TWI636577B - Solar cell and module comprising the same - Google Patents
Solar cell and module comprising the same Download PDFInfo
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- TWI636577B TWI636577B TW102104839A TW102104839A TWI636577B TW I636577 B TWI636577 B TW I636577B TW 102104839 A TW102104839 A TW 102104839A TW 102104839 A TW102104839 A TW 102104839A TW I636577 B TWI636577 B TW I636577B
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- 239000000758 substrate Substances 0.000 claims abstract description 78
- 238000002161 passivation Methods 0.000 claims abstract description 35
- 229910052732 germanium Inorganic materials 0.000 claims description 8
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 5
- 239000005022 packaging material Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 11
- 230000005684 electric field Effects 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000008393 encapsulating agent Substances 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- KODMFZHGYSZSHL-UHFFFAOYSA-N aluminum bismuth Chemical compound [Al].[Bi] KODMFZHGYSZSHL-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0216—Coatings
- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02167—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/06—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by potential barriers
- H01L31/068—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by potential barriers the potential barriers being only of the PN homojunction type, e.g. bulk silicon PN homojunction solar cells or thin film polycrystalline silicon PN homojunction solar cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/547—Monocrystalline silicon PV cells
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Abstract
一種太陽能電池及其模組，該電池包含：一具有相反的一受光面與一背面的基板、一位於該背面上並具有一開口部的鈍化層，及一位於該鈍化層上並經由該開口部接觸該背面的背面電極。其中，該開口部具有一沿該基板的周緣延伸並呈環狀的第一開口圖案，以及一被該第一開口圖案所環繞並具有數個子開口的第二開口圖案，該第一開口圖案與該基板周緣的距離小於5mm。藉由在該第二開口圖案的外圍設置該第一開口圖案，而且第一開口圖案鄰近該基板的周緣而配置，可提升該背面電極與該基板之間的導電接觸面積，進而提升電流收集效果與光電轉換效率。 A solar cell and a module thereof, comprising: a substrate having an opposite light receiving surface and a back surface; a passivation layer on the back surface and having an opening portion; and a passivation layer on the passivation layer and passing through the opening The portion contacts the back electrode of the back surface. The opening portion has a first opening pattern extending along a circumference of the substrate and being annular, and a second opening pattern surrounded by the first opening pattern and having a plurality of sub-openings, the first opening pattern and The distance from the periphery of the substrate is less than 5 mm. By disposing the first opening pattern on the periphery of the second opening pattern, and the first opening pattern is disposed adjacent to the periphery of the substrate, the conductive contact area between the back surface electrode and the substrate can be improved, thereby improving the current collecting effect. With photoelectric conversion efficiency.
Description
本發明是有關於一種太陽能電池及其模組，特別是指一種矽晶太陽能電池及其模組。 The invention relates to a solar cell and a module thereof, in particular to a twin solar cell and a module thereof.
參閱圖1、2，已知的矽晶太陽能電池主要包含：一具有相反的一受光面911與一背面912的基板91、一位於該受光面911上的正面電極92、數個位於該背面912的局部背表面電場(Local Back Surface Field，簡稱LBSF)93、一位於該背面912上並具有數個開口941的鈍化層94，以及一位於該鈍化層94上並可經由該數個開口941接觸該背面912的背面電極95。 Referring to FIGS. 1 and 2, a known twin solar cell mainly comprises: a substrate 91 having an opposite light receiving surface 911 and a back surface 912, a front surface electrode 92 on the light receiving surface 911, and a plurality of the front surface 912. a local back surface field (LBSF) 93, a passivation layer 94 on the back surface 912 and having a plurality of openings 941, and a passivation layer 94 on the passivation layer 94 and contact through the plurality of openings 941 The back surface electrode 95 of the back surface 912.
該鈍化層94用於填補、降低該基板91的表面缺陷，進而降低載子在該基板91的背面912處的複合速率，以提升電池的轉換效率。該數個局部背表面電場93分別對應該數個開口941地位於該背面912處，局部背表面電場93的載子濃度大於該基板91的載子濃度，可幫助提升載子收集效率及光電轉換效率。此種具有鈍化層94與局部背表面電場93的電池稱為PERC電池(Passivated Emitter and Rear Contact Solar Cell)，相較於傳統未設有鈍化層94的電池而言，具有較高的轉換效率。 The passivation layer 94 is used to fill and reduce surface defects of the substrate 91, thereby reducing the recombination rate of the carrier at the back surface 912 of the substrate 91 to improve the conversion efficiency of the battery. The plurality of partial back surface electric fields 93 are respectively located at the back surface 912 corresponding to the plurality of openings 941. The carrier concentration of the partial back surface electric field 93 is greater than the carrier concentration of the substrate 91, which can improve the carrier collection efficiency and photoelectric conversion. effectiveness. Such a battery having a passivation layer 94 and a partial back surface electric field 93 is called a PERC (Passivated Emitter and Rear Contact Solar Cell), and has a higher conversion efficiency than a conventional battery in which the passivation layer 94 is not provided.
而該PERC電池的背面電極95與該基板91的背面912接觸的面積，相當於該鈍化層94的該數個開口941的面積，由於該數個開口941的面積有限，導致該背面電極95與 該背面912接觸的面積較少，因而造成該電池之串聯電阻(Rs)過大，電流收集效果不佳。而且根據期刊IEEE JOURNAL OF PHOTOVOLTAICS,VOL.1,NO.1,JULY 2011，「Evaluation of Series Resistance Losses in Screen-Printed Solar Cells With Local Rear Contacts」一文記載，該電池之背面912的四角部位913更容易發生高阻抗的問題，即期刊所提到的Redge較高，而且當該背面電極95之透過該數個開口941而接觸該背面912的面積愈小時，上述的高Redge現象愈顯著，如此會導致填充因子(Fill Factor)下降並影響電池的轉換效率，因此已知的PERC太陽能電池有待改良。 The area of the back surface electrode 95 of the PERC battery contacting the back surface 912 of the substrate 91 corresponds to the area of the plurality of openings 941 of the passivation layer 94. Since the area of the plurality of openings 941 is limited, the back surface electrode 95 is The back surface 912 has a small contact area, which causes the series resistance (Rs) of the battery to be too large, and the current collection effect is not good. Moreover, according to the article IEEE FORUM OF PHOTOVOLTAICS, VOL.1, NO.1, JULY 2011, "Evaluation of Series Resistance Losses in Screen-Printed Solar Cells With Local Rear Contacts", the four corners 913 of the back surface 912 of the battery are easier. The problem of high impedance occurs, that is, the Redge mentioned in the journal is high, and the smaller the area of the back surface electrode 95 that passes through the plurality of openings 941 and contacts the back surface 912, the more significant the above-mentioned high Redge phenomenon, which may result in The Fill Factor drops and affects the conversion efficiency of the battery, so the known PERC solar cells need to be improved.
因此，本發明之目的，即在提供一種可降低電池之串聯電阻並提升光電轉換效率的太陽能電池及其模組。 Accordingly, it is an object of the present invention to provide a solar cell and a module thereof which can reduce the series resistance of a battery and improve the photoelectric conversion efficiency.
於是，本發明太陽能電池，包含：一具有相反的一受光面與一背面的基板、一位於該受光面上的正面電極、一位於該背面上並具有一開口部的鈍化層，及一位於該鈍化層上並經由該開口部接觸該基板的背面的背面電極。其中，該開口部具有一沿該基板的周緣延伸並呈環狀的第一開口圖案，以及一被該第一開口圖案所環繞並具有數個子開口的第二開口圖案，該第一開口圖案與該基板周緣的距離小於5mm。 Therefore, the solar cell of the present invention comprises: a substrate having an opposite light receiving surface and a back surface, a front electrode on the light receiving surface, a passivation layer on the back surface and having an opening portion, and a The back surface electrode of the back surface of the substrate is contacted through the opening on the passivation layer. The opening portion has a first opening pattern extending along a circumference of the substrate and being annular, and a second opening pattern surrounded by the first opening pattern and having a plurality of sub-openings, the first opening pattern and The distance from the periphery of the substrate is less than 5 mm.
本發明提供的另一種太陽能電池，包含：一基板、一正面電極、一鈍化層，及一背面電極。該基板為單晶矽基 板，並具有相反的一受光面與一背面、四個間隔的長側邊，以及四個與該四個長側邊交錯配置的短側邊。該正面電極位於該受光面上。該鈍化層位於該背面上並具有一開口部。該背面電極位於該鈍化層上並經由該開口部接觸該基板的背面。 Another solar cell provided by the present invention comprises: a substrate, a front electrode, a passivation layer, and a back electrode. The substrate is a single crystal ruthenium The plate has an opposite light receiving surface and a back surface, four spaced long sides, and four short sides arranged in a staggered manner with the four long sides. The front electrode is located on the light receiving surface. The passivation layer is on the back surface and has an opening. The back electrode is located on the passivation layer and contacts the back surface of the substrate via the opening.
其中，該開口部包括一第一開口圖案與一第二開口圖案，該第一開口圖案包括四個分別鄰近該基板之該四個短側邊的第一線狀開口，每一第一線狀開口的任一部位和與其對應的該短側邊的距離小於8mm，該第二開口圖案包括數個子開口，每一子開口和該四個短側邊之任一短側邊的最短距離大於8mm。 The opening portion includes a first opening pattern and a second opening pattern, the first opening pattern includes four first linear openings respectively adjacent to the four short sides of the substrate, each of the first lines The distance between any portion of the opening and the corresponding short side is less than 8 mm, the second opening pattern includes a plurality of sub-openings, and the shortest distance of each of the short sides of each of the four short sides is greater than 8 mm .
本發明太陽能電池模組，包含：相對設置的一第一板材與一第二板材、數個如上述且排列於該第一板材與該第二板材之間的太陽能電池，及一封裝材。該封裝材位於該第一板材與該第二板材之間，並包覆在該數個太陽能電池的周圍。 The solar cell module of the present invention comprises: a first plate and a second plate disposed oppositely, a plurality of solar cells as described above and arranged between the first plate and the second plate, and a package. The encapsulant is located between the first plate and the second plate and is wrapped around the plurality of solar cells.
本發明之功效：藉由在該第二開口圖案的外圍設置該第一開口圖案，而且第一開口圖案鄰近該基板的周緣或四角而配置，從而可提升該背面電極與該基板之間的導電接觸面積，以降低電池之串聯電阻、提升電流收集效果與提升光電轉換效率。 The effect of the present invention is that the first opening pattern is disposed on the periphery of the second opening pattern, and the first opening pattern is disposed adjacent to the circumference or the four corners of the substrate, thereby improving the conductivity between the back surface electrode and the substrate Contact area to reduce the series resistance of the battery, improve current collection and improve photoelectric conversion efficiency.
有關本發明之前述及其他技術內容、特點與功效，在以下配合參考圖式之十一個較佳實施例的詳細說明中，將 可清楚的呈現。在本發明被詳細描述前，要注意的是，在以下的說明內容中，類似的元件是以相同的編號來表示。 The foregoing and other technical contents, features, and effects of the present invention will be described in the following detailed description of the eleven preferred embodiments with reference to the drawings. Can be clearly presented. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.
參閱圖3、4、5，本發明太陽能電池模組之第一較佳實施例包含：上下相對設置的一第一板材1與一第二板材2、數個陣列式排列於該第一板材1與該第二板材2間的太陽能電池3，及至少一位於該第一板材1及該第二板材2間，並包覆在該數個太陽能電池3周圍的封裝材4。 Referring to FIG. 3, FIG. 4, the first preferred embodiment of the solar cell module of the present invention comprises: a first plate 1 and a second plate 2 disposed opposite each other, and a plurality of arrays arranged on the first plate 1 The solar cell 3 between the second plate 2 and at least one of the first plate 1 and the second plate 2 are wrapped around the plurality of solar cells 3.
該第一板材1與該第二板材2在實施上沒有特殊限制，可以使用玻璃或塑膠板材，而且位於電池受光面的一側的板材必須為可透光。該封裝材4的材質例如可透光的乙烯醋酸乙烯共聚物(EVA)，或其他可用於太陽能電池模組封裝的相關材料。 The first plate 1 and the second plate 2 are not particularly limited in implementation, and a glass or plastic plate may be used, and the plate on one side of the light receiving surface of the battery must be permeable to light. The material of the encapsulant 4 is, for example, a light transmissive ethylene vinyl acetate copolymer (EVA), or other related materials that can be used for solar cell module packaging.
該數個太陽能電池3透過圖未示出的焊帶導線(ribbon)電連接。該數個太陽能電池3的結構都相同，以下僅以其中一個為例來進行說明。 The plurality of solar cells 3 are electrically connected through ribbons not shown. The structures of the plurality of solar cells 3 are the same, and only one of them will be described below as an example.
該太陽能電池3包含：一基板31、一正面電極32、數個局部背表面電場33、一鈍化層34，以及一背面電極35。 The solar cell 3 includes a substrate 31, a front electrode 32, a plurality of partial back surface electric fields 33, a passivation layer 34, and a back surface electrode 35.
該基板31具有相反的一受光面311與一背面312，在該受光面311處的內側可設置一射極層313，而該射極層313上可設置一圖未示出的抗反射層。其中，該基板31例如矽基板，且該基板31與該射極層313中的其中一個為n型半導體，另一個為p型半導體，進而形成p-n接面。本實施例是以單晶矽基板為例，因此該基板31的四邊受到裁切而使該基板31類似於八邊形，且該基板31之四個短側邊 316呈弧線，但本發明實施時也可以使用多晶矽基板，多晶矽基板是呈現四邊形。該抗反射層的材料例如氮化矽(SiNx)，可用於降低光反射，以提高光線入射量。 The substrate 31 has an opposite light receiving surface 311 and a back surface 312. An emitter layer 313 may be disposed on the inner side of the light receiving surface 311, and an antireflection layer (not shown) may be disposed on the emitter layer 313. The substrate 31 is, for example, a germanium substrate, and one of the substrate 31 and the emitter layer 313 is an n-type semiconductor, and the other is a p-type semiconductor, thereby forming a pn junction. In this embodiment, a single crystal germanium substrate is taken as an example. Therefore, the four sides of the substrate 31 are cut so that the substrate 31 is similar to an octagon, and the four short sides 316 of the substrate 31 are curved, but the present invention is implemented. A polycrystalline germanium substrate can also be used, and the polycrystalline germanium substrate exhibits a quadrangular shape. The material of the anti-reflection layer such as tantalum nitride (SiN x ) can be used to reduce light reflection to increase the amount of light incident.
該正面電極32位於該受光面311上，並與該背面電極35配合用於傳導電池之電能，由於該正面電極32非本發明的改良重點，在此不再說明。 The front surface electrode 32 is located on the light receiving surface 311 and cooperates with the back surface electrode 35 for conducting electric energy of the battery. Since the front surface electrode 32 is not a modification of the present invention, it will not be described here.
該數個局部背表面電場33位於該基板31的背面312處，本實施例的局部背表面電場33為鋁矽(Al-Si)混合材料所形成的p型半導體，其導電形式與該基板31相同且其載子濃度大於該基板31的載子濃度，藉由局部背表面電場33的電場作用阻擋電子朝該背面312的方向移動，使電子被收集於該射極層313，以提升載子收集效率及轉換效率。 The plurality of partial back surface electric fields 33 are located at the back surface 312 of the substrate 31. The partial back surface electric field 33 of the present embodiment is a p-type semiconductor formed of an aluminum-bismuth (Al-Si) mixed material, and the conductive form thereof and the substrate 31 The same and the carrier concentration is greater than the carrier concentration of the substrate 31, and the electric field of the partial back surface electric field 33 blocks the movement of electrons toward the back surface 312, so that electrons are collected in the emitter layer 313 to lift the carrier. Collect efficiency and conversion efficiency.
該鈍化層34位於該背面312上，用於填補、降低該基板31的表面缺陷，進而降低載子在該背面312處的複合速率，可提升電池的開路電壓、短路電流及轉換效率。該鈍化層34的材料例如氧化物、氮化物，或氧化物與氮化物等的複合材料。 The passivation layer 34 is located on the back surface 312 for filling and reducing surface defects of the substrate 31, thereby reducing the recombination rate of the carrier at the back surface 312, and improving the open circuit voltage, short circuit current and conversion efficiency of the battery. The material of the passivation layer 34 is, for example, an oxide, a nitride, or a composite of an oxide and a nitride.
該鈍化層34具有一開口部36，該開口部36具有一沿該基板31的周緣延伸並呈環狀的第一開口圖案37，以及一被該第一開口圖案37所環繞並具有數個子開口381的第二開口圖案38。本實施例的第一開口圖案37為一個連續且呈封閉狀的環狀開口371，該環狀開口371的延伸形態與該基板31的周緣形狀相同。該第二開口圖案38的該數個子開口381為相互平行的直線狀開口，該數個子開口381沿一 第一方向51延伸並且沿一垂直該第一方向51的第二方向52間隔排列。該第一開口圖案37的寬度w1與該數個子開口381的寬度w2可以相同或不同。較佳地，該第一開口圖案37與該第二開口圖案38的總面積佔該背面312面積的0.5%~20%之間，在此面積範圍內，可保留足夠大的鈍化層34面積，以提供良好的鈍化效果，同時也能形成面積足夠的背面電極35，以提供良好電性。雖然本實施例的每一子開口381的兩端與該第一開口圖案37之間未連接，但實施時也可以連接。 The passivation layer 34 has an opening portion 36 having a first opening pattern 37 extending along the circumference of the substrate 31 and being annular, and a plurality of sub-openings surrounded by the first opening pattern 37. a second opening pattern 38 of 381. The first opening pattern 37 of the present embodiment is a continuous and closed annular opening 371 having an extended shape identical to the peripheral shape of the substrate 31. The plurality of sub-openings 381 of the second opening pattern 38 are linear openings parallel to each other, and the plurality of sub-openings 381 are along a The first direction 51 extends and is spaced apart along a second direction 52 that is perpendicular to the first direction 51. The width w1 of the first opening pattern 37 and the width w2 of the plurality of sub-openings 381 may be the same or different. Preferably, the total area of the first opening pattern 37 and the second opening pattern 38 is between 0.5% and 20% of the area of the back surface 312, and a sufficiently large area of the passivation layer 34 can be retained in the area. In order to provide a good passivation effect, it is also possible to form a back electrode 35 having a sufficient area to provide good electrical properties. Although the two ends of each sub-opening 381 of the present embodiment are not connected to the first opening pattern 37, they may be connected during implementation.
補充說明的是，由於從該基板31的周緣至基板31周緣往內5mm的範圍內為該鈍化層34鍍膜之均勻度較差的區域，同時也是基板31的受光面311上的抗反射層(SiNx)之易回鍍的區域，因此該範圍內的鈍化層34的鈍化效果有限，所以將該第一開口圖案37設置在該範圍內的鈍化層34上，對於鈍化層34的效能影響並不大，因此較佳地，該第一開口圖案37與該基板31周緣的距離d1小於5mm，如此可在較不破壞鈍化層34品質及較不影響開路電壓的情況下，降低串聯電阻與提升填充因子(Fill Factor)。需要說明的是，該第一開口圖案37上的各個部位與該基板31周緣的距離不一定相同，但是各部位的上述距離都小於5mm。 It is to be noted that the region where the uniformity of the coating of the passivation layer 34 is poor in the range of 5 mm from the periphery of the substrate 31 to the periphery of the substrate 31 is also an anti-reflection layer (SiN) on the light-receiving surface 311 of the substrate 31. The region of x ) which is easy to be plated, so that the passivation effect of the passivation layer 34 in the range is limited, so that the first opening pattern 37 is disposed on the passivation layer 34 in the range, and the effect on the passivation layer 34 is not Preferably, the distance d1 between the first opening pattern 37 and the periphery of the substrate 31 is less than 5 mm, so that the series resistance and the lifting filling can be reduced without damaging the quality of the passivation layer 34 and less affecting the open circuit voltage. Factor (Fill Factor). It should be noted that the distance between each part of the first opening pattern 37 and the periphery of the substrate 31 is not necessarily the same, but the distance of each part is less than 5 mm.
該背面電極35位於該鈍化層34上並經由該開口部36接觸該基板31的背面312。該背面電極35包括數個分別填充於該第一開口圖案37之環狀開口371及該數個子開口381中的第一導電部351，以及一位於該鈍化層34的表面 上且連接該數個第一導電部351的第二導電部352。實際上該背面電極35還可包括至少一沿該第二方向52延伸的匯流電極，但由於該匯流電極非本發明的改良重點，因此不再說明。此外，本實施例的背面電極35的周緣大致順著該基板31的周緣形狀延伸，因此該背面電極35的周緣包含有數個直線段與數個弧線段。 The back surface electrode 35 is located on the passivation layer 34 and contacts the back surface 312 of the substrate 31 via the opening portion 36. The back surface electrode 35 includes a plurality of first conductive portions 351 respectively filled in the annular opening 371 of the first opening pattern 37 and the plurality of sub- openings 381, and a surface on the passivation layer 34. The second conductive portions 352 of the plurality of first conductive portions 351 are connected to each other. In fact, the back electrode 35 may further include at least one bus electrode extending in the second direction 52, but since the bus electrode is not a modification of the present invention, it will not be described. Further, since the peripheral edge of the back surface electrode 35 of the present embodiment extends substantially along the peripheral edge shape of the substrate 31, the peripheral edge of the back surface electrode 35 includes a plurality of straight segments and a plurality of arc segments.
綜上所述，本發明藉由該第一開口圖案37與該第二開口圖案38的配合設計，使該背面電極35可同時經由該第一開口圖案37與該第二開口圖案38之孔洞而接觸該基板31的背面312，進而增加該背面電極35與該背面312的導電接觸面積，從而降低電池之串聯電阻，提升電流收集效率與提高填充因子，並能有效提升電池的光電轉換效率。其中，由於該第一開口圖案37鄰近且沿著該基板31的周緣而設置，可提高該基板31的周緣部位表面與該背面電極35的導電接觸面積，可減輕以往電池之邊緣部位的高阻抗問題。 In summary, the back surface electrode 35 can simultaneously pass through the holes of the first opening pattern 37 and the second opening pattern 38 by the cooperation design of the first opening pattern 37 and the second opening pattern 38. Contacting the back surface 312 of the substrate 31 further increases the conductive contact area of the back surface electrode 35 and the back surface 312, thereby reducing the series resistance of the battery, improving current collection efficiency and increasing the fill factor, and effectively improving the photoelectric conversion efficiency of the battery. The first opening pattern 37 is disposed adjacent to and along the circumference of the substrate 31, thereby improving the conductive contact area between the surface of the peripheral portion of the substrate 31 and the back surface electrode 35, thereby reducing the high impedance of the edge portion of the conventional battery. problem.
參閱圖6，本發明太陽能電池模組之第二較佳實施例，與該第一較佳實施例的結構大致相同，不同的地方在於：本實施例的太陽能電池3的第一開口圖案37包括數個間隔的島狀開口372，該數個島狀開口372的配置方式使該第一開口圖案37整體形成虛線狀且不連續的環狀開口，所述的虛線狀的環狀開口是指該數個島狀開口372沿著該基板31的周緣而間隔配置，使該第一開口圖案37整體可包圍該第二開口圖案38的該數個子開口381。其中，所述的島狀主 要是為了與該第一較佳實施例之連續未間斷的開口圖案作區分，該島狀可以為圓形、半圓形、多邊形、方形或其他形狀。 Referring to FIG. 6, a second preferred embodiment of the solar cell module of the present invention is substantially the same as that of the first preferred embodiment, except that the first opening pattern 37 of the solar cell 3 of the present embodiment includes a plurality of spaced island openings 372, wherein the plurality of island openings 372 are arranged such that the first opening pattern 37 is integrally formed with a broken line and a discontinuous annular opening, and the dotted annular opening means The plurality of island-shaped openings 372 are spaced apart along the circumference of the substrate 31 such that the first opening pattern 37 as a whole can surround the plurality of sub-openings 381 of the second opening pattern 38. Among them, the island-shaped master In order to distinguish from the continuous uninterrupted opening pattern of the first preferred embodiment, the island shape may be circular, semi-circular, polygonal, square or other shape.
參閱圖7，本發明太陽能電池模組之第三較佳實施例，與該第一較佳實施例的結構大致相同。其中，該太陽能電池3的該基板31的周緣包括兩個相對且沿該第一方向51延伸的第一側邊314，以及兩個相對且位於該兩個第一側邊314之間並沿該第二方向延伸52的第二側邊315，每一第一側邊314與每一第二側邊315之間透過一短側邊316相連接。而本實施例與該第一較佳實施例不同的地方主要在於：該第一開口圖案37具有兩個分別鄰近該兩個第一側邊314的第一圖案部373，以及兩個分別鄰近該兩個第二側邊315的第二圖案部374。該兩個第一圖案部373分別為一沿該第一方向51連續延伸的直線狀開口375。該兩個第二圖案部374為虛線狀開口，每一第二圖案部374包括數個間隔的島狀開口376，而且每一第二圖案部374可以延伸對應於該數個短側邊316，亦即在對應每一短側邊316處也可以配置有至少一島狀開口376。 Referring to Figure 7, a third preferred embodiment of the solar cell module of the present invention is substantially identical in construction to the first preferred embodiment. The peripheral edge of the substrate 31 of the solar cell 3 includes two first side edges 314 opposite and extending along the first direction 51, and two opposite and located between the two first side edges 314 along the The second side 315 of the second direction extension 52 is connected between each of the first side edges 314 and each of the second side edges 315 through a short side 316. The difference between the embodiment and the first preferred embodiment is that the first opening pattern 37 has two first pattern portions 373 adjacent to the two first side edges 314, and two adjacent to the first opening portion 314. The second pattern portion 374 of the two second side edges 315. The two first pattern portions 373 are respectively a linear opening 375 extending continuously in the first direction 51. The two second pattern portions 374 are dotted-shaped openings, each of the second pattern portions 374 includes a plurality of spaced island-shaped openings 376, and each of the second pattern portions 374 may extend corresponding to the plurality of short sides 316. That is, at least one island-shaped opening 376 may be disposed at each short side 316.
補充說明的是，若使用多晶矽基板時，則不會有該數個短側邊316之設計，此時第一側邊314與第二側邊315直接相連。 It should be noted that, when a polycrystalline germanium substrate is used, there is no design of the plurality of short sides 316, and the first side 314 is directly connected to the second side 315.
參閱圖8，本發明太陽能電池模組之第四較佳實施例，與該第三較佳實施例的結構大致相同，不同的地方在於：本實施例的第一開口圖案37的第二圖案部374包括數個間 隔的連接開口377，每一連接開口377連接在該第二開口圖案38的兩相鄰的子開口381之端點，或者連接在第一圖案部373的直線狀開口375之端點及相鄰的子開口381之端點。該數個連接開口377間隔設置，實際上也相當於島狀開口的形式。 Referring to FIG. 8, a fourth preferred embodiment of the solar cell module of the present invention is substantially the same as the structure of the third preferred embodiment, and the difference is that the second pattern portion of the first opening pattern 37 of the embodiment is 374 includes several rooms Each of the connection openings 377 is connected to the end of the two adjacent sub-openings 381 of the second opening pattern 38, or is connected to the end of the linear opening 375 of the first pattern portion 373 and adjacent thereto. The end of the child opening 381. The plurality of connection openings 377 are spaced apart and actually correspond to the form of island openings.
參閱圖9，本發明太陽能電池模組之第五較佳實施例，與該第一較佳實施例的結構大致相同，不同的地方在於：本實施例之第二開口圖案38的該數個子開口381為島狀開口，該數個子開口381的位置皆互相對應。所述的島狀可以為圓形、半圓形、多邊形、方形或其他形狀。 Referring to FIG. 9, the fifth preferred embodiment of the solar cell module of the present invention is substantially the same as the structure of the first preferred embodiment, and the difference is that the plurality of sub-openings of the second opening pattern 38 of the embodiment 381 is an island-shaped opening, and the positions of the plurality of sub-openings 381 correspond to each other. The island shape may be circular, semi-circular, polygonal, square or other shape.
參閱圖10，本發明太陽能電池模組之第六較佳實施例，與該第五較佳實施例的結構大致相同，不同的地方在於：本實施例之該數個子開口381的位置交錯排列。 Referring to FIG. 10, the sixth preferred embodiment of the solar cell module of the present invention is substantially the same as the structure of the fifth preferred embodiment, except that the positions of the plurality of sub-openings 381 of the present embodiment are staggered.
參閱圖11，本發明太陽能電池模組之第七較佳實施例，與該第一較佳實施例的結構大致相同，不同的地方在於：該第二開口圖案38除了包括數個沿該第一方向51延伸的子開口381之外，還包括數個沿該第二方向52延伸的子開口382，且該數個子開口381與該數個子開口382縱橫交錯排列而構成網格狀。而且本實施例的該第一開口圖案37連接該數個子開口381、382，藉此使該背面電極35可形成連續的導電網路，可更進一步提升電流收集效果。 Referring to FIG. 11, a seventh preferred embodiment of the solar cell module of the present invention is substantially the same as the first preferred embodiment, except that the second opening pattern 38 includes a plurality of along the first In addition to the sub-opening 381 extending in the direction 51, a plurality of sub-openings 382 extending along the second direction 52 are further included, and the plurality of sub-openings 381 and the plurality of sub-openings 382 are arranged in a crisscross manner to form a grid shape. Moreover, the first opening pattern 37 of the embodiment connects the plurality of sub-openings 381, 382, thereby forming the back electrode 35 to form a continuous conductive network, which can further improve the current collecting effect.
參閱圖12，本發明太陽能電池模組之第八較佳實施例，與該第一較佳實施例的結構大致相同，不同的地方在於：本實施例的該第一開口圖案37的寬度w1大於該第二開 口圖案38的該數個子開口381的寬度w2。而且本實施例的該第一開口圖案37連接該數個子開口381，藉由上述設計使該背面電極(圖未示)與該基板31之間的導電接觸面積增加，並可形成連續的導電網路，有助於提升電流收集效果及光電轉換效率。本實施例的背面電極的邊界大致沿著該第一開口圖案37的外圍邊緣形狀延伸，並且該背面電極可以完全覆蓋該第一開口圖案37與該第二開口圖案38。 Referring to FIG. 12, the eighth preferred embodiment of the solar cell module of the present invention is substantially the same as the structure of the first preferred embodiment, except that the width w1 of the first opening pattern 37 of the embodiment is greater than The second opening The width w2 of the plurality of sub-openings 381 of the mouth pattern 38. Moreover, the first opening pattern 37 of the embodiment is connected to the plurality of sub-openings 381, and the conductive contact area between the back surface electrode (not shown) and the substrate 31 is increased by the above design, and a continuous conductive mesh can be formed. The road helps to improve current collection and photoelectric conversion efficiency. The boundary of the back surface electrode of the present embodiment extends substantially along the peripheral edge shape of the first opening pattern 37, and the back surface electrode can completely cover the first opening pattern 37 and the second opening pattern 38.
需要說明的是，上述第一~第八較佳實施例的該第一開口圖案的局部對應該基板的四個短側邊而呈弧形延伸，使該第一開口圖案的各部位與該基板周緣的距離皆小於5mm。而該背面電極的局部周緣亦對應該四個短側邊而呈弧形。但本發明不以上述設計為限，以下透過其他實施例來說明。 It should be noted that the first opening pattern of the first to eighth preferred embodiments partially extends in a curved shape corresponding to the four short sides of the substrate, so that the portions of the first opening pattern and the substrate The distance between the circumferences is less than 5mm. The partial periphery of the back electrode also has an arc shape corresponding to the four short sides. However, the present invention is not limited to the above design, and will be described below by way of other embodiments.
參閱圖13，本發明太陽能電池模組之第九較佳實施例，與該第一較佳實施例的結構大致相同，本實施例的基板31同樣為單晶矽基板，該基板31的周緣具有四個間隔且呈直線延伸的長側邊317，以及四個與該四個長側邊317交錯配置並呈弧線延伸的短側邊316。其中兩個長側邊317沿該第一方向51延伸並沿該第二方向52相對，另外兩個長側邊317沿該第二方向52延伸並沿該第一方向51相對，該四個短側邊316分別連接在任兩相鄰的長側邊317之間，且該四個短側邊316不平行於該第一方向51與該第二方向52。 Referring to FIG. 13, a ninth preferred embodiment of the solar cell module of the present invention is substantially the same as that of the first preferred embodiment. The substrate 31 of the present embodiment is also a single crystal germanium substrate, and the periphery of the substrate 31 has Four spaced apart and linearly extending long sides 317, and four short sides 316 that are staggered with the four long sides 317 and extend in an arc. Two of the long sides 317 extend along the first direction 51 and are opposite to the second direction 52. The other two long sides 317 extend along the second direction 52 and are opposite along the first direction 51. The four short The side edges 316 are respectively connected between any two adjacent long side edges 317, and the four short side edges 316 are not parallel to the first direction 51 and the second direction 52.
本實施例的鈍化層34的開口部36同樣包括一第一開 口圖案37與一第二開口圖案38。本實施例與該第一較佳實施例的主要不同處在於：本實施例的第一開口圖案37包括四個分別鄰近該基板31之該四個短側邊316的第一線狀開口378，每一第一線狀開口378的任一部位和與其對應的該短側邊316的距離小於8mm，當然，第一線狀開口378上的不同部位和與其對應的該短側邊316的距離不一定相同，但各部位的該距離恆小於8mm，例如圖13標示的d2、d3、d4皆小於8mm。本實施例設定8mm的原因在於，因為第一線狀開口378為直線延伸，與弧線延伸的短側邊316之間會有局部部位的距離較大，並且超過該第一較佳實施例設定的5mm。 The opening portion 36 of the passivation layer 34 of the present embodiment also includes a first opening The mouth pattern 37 and a second opening pattern 38. The main difference between this embodiment and the first preferred embodiment is that the first opening pattern 37 of the embodiment includes four first linear openings 378 adjacent to the four short sides 316 of the substrate 31, respectively. The distance between any portion of each first linear opening 378 and the corresponding short side 316 is less than 8 mm. Of course, the distance between the different portions of the first linear opening 378 and the corresponding short side 316 is not It must be the same, but the distance of each part is always less than 8mm. For example, d2, d3, and d4 indicated in Figure 13 are less than 8mm. The reason why the embodiment is set to 8 mm is that since the first linear opening 378 extends in a straight line, the distance between the short side edges 316 extending from the arc portion is large, and exceeds the setting of the first preferred embodiment. 5mm.
該第二開口圖案38的每一子開口381和該四個短側邊316之任一短側邊316的最短距離大於8mm，當然，每一子開口381的上述最短距離可能各不相同(如圖13標示出其中幾個最短距離分別為d5、d6、d7)，但上述主要用於表示每一子開口381位於該四個第一線狀開口378所包圍的範圍之內，所以每一子開口381與每一第一線狀開口378相比較，較為遠離該基板31的周緣。 The shortest distance between each sub-opening 381 of the second opening pattern 38 and any short side 316 of the four short sides 316 is greater than 8 mm. Of course, the shortest distance of each sub-opening 381 may be different (eg, Figure 13 shows that some of the shortest distances are d5, d6, d7), but the above is mainly used to indicate that each sub-opening 381 is within the range enclosed by the four first linear openings 378, so each sub- The opening 381 is farther from the periphery of the substrate 31 than each of the first linear openings 378.
更進一步地，本發明的每一第一線狀開口378的任一部位和與其對應的該短側邊316的距離可以小於5mm。該第二開口圖案38的每一子開口381和該四個短側邊316之任一短側邊316的最短距離大於5mm。較佳地，該第一開口圖案37與該第二開口圖案38的總面積佔該基板31的背面面積的0.5%~20%。 Furthermore, the distance between any portion of each of the first linear openings 378 of the present invention and the corresponding short sides 316 may be less than 5 mm. The shortest distance between each of the sub-openings 381 of the second opening pattern 38 and any of the short sides 316 of the four short sides 316 is greater than 5 mm. Preferably, the total area of the first opening pattern 37 and the second opening pattern 38 accounts for 0.5%-20% of the back surface area of the substrate 31.
本實施例在該基板31的該四個短側邊316分別設置該四個第一線狀開口378，藉此增加該背面電極35與該基板31之間的接觸導電面積，可改善單晶矽電池在電池的四角部位容易產生高阻抗的問題，從而可提升電流收集效果及光電轉換效率。 In this embodiment, the four first linear openings 378 are respectively disposed on the four short sides 316 of the substrate 31, thereby increasing the contact conductive area between the back surface electrode 35 and the substrate 31, thereby improving the single crystal germanium. The battery is prone to high impedance at the four corners of the battery, thereby improving current collection and photoelectric conversion efficiency.
補充說明的是，該第一開口圖案37的第一線狀開口378的寬度w3與該第二開口圖案38的該數個子開口381的寬度w2可以相同也可以不同，其中若第一線狀開口378的寬度w3加大並且大於該數個子開口381的寬度w2，更有助於降低電池四角部位的高阻抗問題。此外，本實施例的該數個子開口381除了可以為互相平行的線狀開口之外，也可以如圖9或圖10所示為島狀開口，或如圖11所示為網格狀分布，或者可以為其他設計。 It is to be noted that the width w3 of the first linear opening 378 of the first opening pattern 37 and the width w2 of the plurality of sub-openings 381 of the second opening pattern 38 may be the same or different, wherein the first linear opening The width w3 of 378 is increased and larger than the width w2 of the plurality of sub-openings 381, which helps to reduce the high impedance problem at the four corners of the battery. In addition, the plurality of sub-openings 381 of the embodiment may be island-shaped openings as shown in FIG. 9 or FIG. 10, or may be grid-like as shown in FIG. Or it can be designed for other purposes.
本實施例與該第一較佳實施例的另一個不同點在於：本實施例的背面電極35的周緣在對應於該基板31的該四個短側邊316的部位呈直線延伸。本實施例之背面電極35及該數個第一線狀開口378未順應該四個短側邊316之弧線，而是呈直線延伸的設計，相對於該第一較佳實施例而言，有利於簡化製程。但本實施例的背面電極35的局部周緣實際上也可以順應該四個短側邊316呈弧線延伸。 Another difference between this embodiment and the first preferred embodiment is that the peripheral edge of the back surface electrode 35 of the present embodiment extends in a straight line at a portion corresponding to the four short side edges 316 of the substrate 31. The back electrode 35 of the embodiment and the plurality of first linear openings 378 do not conform to the arc of the four short sides 316, but have a linearly extending design, which is advantageous with respect to the first preferred embodiment. To simplify the process. However, the partial periphery of the back surface electrode 35 of the present embodiment may actually extend in an arc conforming to the four short side edges 316.
參閱圖14，本發明太陽能電池模組之第十較佳實施例，與該第九較佳實施例的結構大致相同，不同的地方在於：本實施例的該第二開口圖案38的該數個子開口381的延伸長度較長，而且其中幾個子開口381連接該第一開口圖 案37的第一線狀開口378，如此可增加該背面電極35與該基板31之間的接觸導電面積，從而可提升電流收集效果及光電轉換效率。 Referring to FIG. 14, a tenth preferred embodiment of the solar cell module of the present invention is substantially the same as the structure of the ninth preferred embodiment, and the difference is that the plurality of sub-opening patterns 38 of the embodiment are The opening 381 has a long extension length, and wherein the plurality of sub-openings 381 are connected to the first opening The first linear opening 378 of the case 37 can increase the contact conductive area between the back surface electrode 35 and the substrate 31, thereby improving the current collecting effect and the photoelectric conversion efficiency.
參閱圖15，本發明太陽能電池模組之第十一較佳實施例，與該第十較佳實施例的結構大致相同，不同的地方在於：該第一開口圖案37還包括兩個沿該第一方向51延伸且沿該第二方向52相對的第二線狀開口379，而且該兩個第二線狀開口379分別沿該基板31之該四個長側邊317中的其中兩個延伸，每一第二線狀開口379和與其對應的該長側邊317的距離d7小於5mm。 Referring to FIG. 15, an eleventh preferred embodiment of the solar cell module of the present invention is substantially the same as the structure of the tenth preferred embodiment. The difference is that the first opening pattern 37 further includes two along the first a second linear opening 379 extending in a direction 51 and opposite the second direction 52, and the two second linear openings 379 respectively extending along two of the four long sides 317 of the substrate 31, The distance d7 of each of the second linear openings 379 and the corresponding long side 317 is less than 5 mm.
此外，每一第一線狀開口378的寬度w3大於每一第二線狀開口379的寬度w4，每一第一線狀開口378的寬度w3也大於該數個子開口381的寬度w2，藉此可提升電池之四角部位的電極接觸面積，以降低電池四角部位的高阻抗問題，從而提升電流收集效果。但在實施時，每一第一線狀開口378的寬度w3也可以等於或小於每一第二線狀開口379的寬度w4。 In addition, the width w3 of each of the first linear openings 378 is greater than the width w4 of each of the second linear openings 379, and the width w3 of each of the first linear openings 378 is also greater than the width w2 of the plurality of sub-openings 381, thereby It can raise the electrode contact area at the four corners of the battery to reduce the high impedance problem at the four corners of the battery, thereby improving the current collecting effect. However, in implementation, the width w3 of each of the first linear openings 378 may also be equal to or smaller than the width w4 of each of the second linear openings 379.
由上述說明可知，本發明的精神主要在於：藉由在該第二開口圖案38的外圍設置該第一開口圖案37，而且第一開口圖案37鄰近基板31的周緣或四角而配置，從而可提升背面電極35與基板31之間的導電接觸面積，提升電流收集效果與光電轉換效率。至於第一開口圖案37與第二開口圖案38的形狀、寬度以及連接關係等設計，則可有多種型態。 As can be seen from the above description, the spirit of the present invention mainly lies in that the first opening pattern 37 is disposed on the periphery of the second opening pattern 38, and the first opening pattern 37 is disposed adjacent to the circumference or the four corners of the substrate 31, thereby being The conductive contact area between the back electrode 35 and the substrate 31 improves the current collecting effect and the photoelectric conversion efficiency. As for the design of the shape, width, and connection relationship of the first opening pattern 37 and the second opening pattern 38, there are many types.
惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及發明說明內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。 The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.
1‧‧‧第一板材 1‧‧‧ first plate
2‧‧‧第二板材 2‧‧‧Second plate
3‧‧‧太陽能電池 3‧‧‧Solar battery
31‧‧‧基板 31‧‧‧Substrate
311‧‧‧受光面 311‧‧‧Stained surface
312‧‧‧背面 312‧‧‧ back
313‧‧‧射極層 313‧‧ ‧ emitter layer
314‧‧‧第一側邊 314‧‧‧ first side
315‧‧‧第二側邊 315‧‧‧ second side
316‧‧‧短側邊 316‧‧‧ Short side
317‧‧‧長側邊 317‧‧‧Long side
32‧‧‧正面電極 32‧‧‧ front electrode
33‧‧‧局部背表面電場 33‧‧‧Partial back surface electric field
34‧‧‧鈍化層 34‧‧‧ Passivation layer
35‧‧‧背面電極 35‧‧‧Back electrode
351‧‧‧第一導電部 351‧‧‧First Conductive Department
352‧‧‧第二導電部 352‧‧‧Second Conductive Department
36‧‧‧開口部 36‧‧‧ openings
37‧‧‧第一開口圖案 37‧‧‧First opening pattern
371‧‧‧環狀開口 371‧‧‧Aperture opening
372‧‧‧島狀開口 372‧‧‧ island opening
373‧‧‧第一圖案部 373‧‧‧First Pattern Department
374‧‧‧第二圖案部 374‧‧‧Second Pattern Department
375‧‧‧直線狀開口 375‧‧‧Linear opening
376‧‧‧島狀開口 376‧‧‧ island opening
377‧‧‧連接開口 377‧‧‧Connecting opening
378‧‧‧第一線狀開口 378‧‧‧First line opening
379‧‧‧第二線狀開口 379‧‧‧Second wire opening
38‧‧‧第二開口圖案 38‧‧‧Second opening pattern
381‧‧‧子開口 381‧‧‧ child opening
382‧‧‧子開口 382‧‧‧ child opening
4‧‧‧封裝材 4‧‧‧Package
51‧‧‧第一方向 51‧‧‧First direction
52‧‧‧第二方向 52‧‧‧second direction
d1~d7‧‧‧距離 D1~d7‧‧‧distance
w1~w4‧‧‧寬度 W1~w4‧‧‧Width
圖1是一種已知太陽能電池的背面示意圖，圖中將數個開口的所在區域以點狀區域表示以方便辨識；圖2是沿圖1的A-A線所取的局部剖視圖；圖3是本發明太陽能電池模組之一第一較佳實施例的局部剖視示意圖；圖4是該第一較佳實施例的一太陽能電池的背面示意圖，主要示意一鈍化層的一開口部的圖案設計，並且以點狀區域示意該開口部以方便辨識；圖中的假想線示意一背面電極；圖5是沿圖4之B-B線所取的局部剖視圖；圖6是本發明太陽能電池模組之一第二較佳實施例的一太陽能電池的背面示意圖；圖7是本發明太陽能電池模組之一第三較佳實施例的一太陽能電池的背面示意圖；圖8是本發明太陽能電池模組之一第四較佳實施例的一太陽能電池的背面示意圖；圖9是本發明太陽能電池模組之一第五較佳實施例的一太陽能電池的背面示意圖；圖10是本發明太陽能電池模組之一第六較佳實施例的 一太陽能電池的背面示意圖；圖11是本發明太陽能電池模組之一第七較佳實施例的一太陽能電池的背面示意圖；圖12是本發明太陽能電池模組之一第八較佳實施例的一太陽能電池的背面示意圖；圖13是本發明太陽能電池模組之一第九較佳實施例的一太陽能電池的背面示意圖；圖14是本發明太陽能電池模組之一第十較佳實施例的一太陽能電池的背面示意圖；及圖15是本發明太陽能電池模組之一第十一較佳實施例的一太陽能電池的背面示意圖。 1 is a schematic rear view of a known solar cell, in which a plurality of openings are indicated by dot-like regions for easy identification; FIG. 2 is a partial cross-sectional view taken along line AA of FIG. 1; FIG. A schematic cross-sectional view of a first preferred embodiment of a solar cell module; FIG. 4 is a schematic rear view of a solar cell of the first preferred embodiment, mainly illustrating a pattern design of an opening of a passivation layer, and The opening portion is indicated by a dot-like area for easy identification; the imaginary line in the figure indicates a back electrode; FIG. 5 is a partial cross-sectional view taken along line BB of FIG. 4; and FIG. 6 is a second of the solar cell module of the present invention. FIG. 7 is a schematic rear view of a solar cell according to a third preferred embodiment of the solar cell module of the present invention; FIG. 8 is a fourth embodiment of the solar cell module of the present invention. FIG. 9 is a schematic rear view of a solar cell according to a fifth preferred embodiment of the solar cell module of the present invention; FIG. 10 is a solar energy of the present invention; a sixth preferred embodiment of the battery module FIG. 11 is a schematic rear view of a solar cell according to a seventh preferred embodiment of the solar cell module of the present invention; and FIG. 12 is an eighth preferred embodiment of the solar cell module of the present invention. FIG. 13 is a schematic rear view of a solar cell according to a ninth preferred embodiment of the solar cell module of the present invention; and FIG. 14 is a tenth preferred embodiment of the solar cell module of the present invention. A rear view of a solar cell; and FIG. 15 is a schematic rear view of a solar cell according to an eleventh preferred embodiment of the solar cell module of the present invention.
Claims (14)
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| TWI552361B (en) * | 2015-12-28 | 2016-10-01 | 茂迪股份有限公司 | Solar cell and module comprising the same |
| JP6691215B2 (en) | 2016-07-28 | 2020-04-28 | 京セラ株式会社 | Solar cell element |
| WO2018180441A1 (en) * | 2017-03-27 | 2018-10-04 | 東洋アルミニウム株式会社 | Paste composition for solar battery |
| TWI658603B (en) * | 2017-07-04 | 2019-05-01 | 茂迪股份有限公司 | Mono-facial solar cell and method for manufacturing the same |
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| CN1274032C (en) * | 2001-01-31 | 2006-09-06 | 信越半导体株式会社 | Solar cell and method for producing same |
| TW201208098A (en) * | 2010-05-31 | 2012-02-16 | Dainippon Printing Co Ltd | Sealing material for solar cell modules, and manufacturing method thereof |
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| CN101447532A (en) * | 2008-12-22 | 2009-06-03 | 上海晶澳太阳能光伏科技有限公司 | Method for preparing crystalline silicon solar cell with passivation on double surfaces |
| KR20100119293A (en) * | 2009-04-30 | 2010-11-09 | 주식회사 효성 | Solar cell manufactured by aao and the method for manufacturing |
| KR101579318B1 (en) * | 2010-04-29 | 2015-12-21 | 엘지전자 주식회사 | Solar cell and method for manufacturing the same |
| CN202275838U (en) * | 2011-09-27 | 2012-06-13 | 新日光能源科技股份有限公司 | Solar cell and back electrode structure thereof |
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| CN1274032C (en) * | 2001-01-31 | 2006-09-06 | 信越半导体株式会社 | Solar cell and method for producing same |
| TW201208098A (en) * | 2010-05-31 | 2012-02-16 | Dainippon Printing Co Ltd | Sealing material for solar cell modules, and manufacturing method thereof |
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