CN201859882U - Solar cell - Google Patents
Solar cell Download PDFInfo
- Publication number
- CN201859882U CN201859882U CN2010202199731U CN201020219973U CN201859882U CN 201859882 U CN201859882 U CN 201859882U CN 2010202199731 U CN2010202199731 U CN 2010202199731U CN 201020219973 U CN201020219973 U CN 201020219973U CN 201859882 U CN201859882 U CN 201859882U
- Authority
- CN
- China
- Prior art keywords
- solar cell
- plain conductor
- breach
- cell according
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004020 conductor Substances 0.000 claims abstract description 54
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 210000004027 cell Anatomy 0.000 description 24
- 238000000034 method Methods 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- H01L31/022433—Particular geometry of the grid contacts
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The utility model relates to a solar cell, which resolves the technical problem of a common solar cell that the efficiency is low, the cost is high and the consumption of conductive material is in a large amount. The solar cell comprises a first metal lead and at least a second metal lead, which are electrically connected and are used as bus. At least one split used for reducing the cross section is disposed in the first and/or the second metal lead. As the split does not have conductive material, the use of conductive material is reduced and the expenditure is saved. The split does not cover the surface of the solar cell, thereby the solar cell can use more light to achieve higher efficiency under the circumstance that the external size of the solar cell is equal.
Description
Technical field
The utility model relates to a kind of solar cell, and it has first plain conductor and at least one second plain conductor, and described second plain conductor and described first plain conductor electrically contact and serve as bus.
Background technology
In the solar cell with n type doped layer, p type doped layer and pn knot layer, the light that projects n type doped layer makes and produces voltage that between n type doped layer and p type doped layer this voltage generates electric current on the electrical appliance that has connected.For can output voltage, on the surface of p type doped layer, metallic plate be installed, and on the surface of n type doped layer, plain conductor be installed.These plain conductors are very thin metal wire or so-called finger-like lines (Finger) usually on the one hand, and they for example are provided with in parallel with each other.On the other hand, these plain conductors are buses (Sammelleitung) of at least one relative broad, and this bus is connected with these finger-like lines, wherein, can set up and the electrically contacting of electrical appliance by means of bus.These doped layers also can be with other orders, have other thickness or exist with other quantity, to form solar cell.In order to connect electrical appliance,, must have all the time to electrically contact with the structure-irrelevant of solar cell.
For the function of solar cell, finger-like line and bus are essential.Yet their shortcoming is that it has covered the n type doped layer that is positioned at the lead below.Thereby only a part of solar cell surface to be used for transform light energy be electric energy.If successfully realize a kind of finger-like line and bus, its solar cell surface of covering is less, will improve the solar cell usefulness of every square measure so.
Yet should not construct these buses arbitrarily smallly, thereby realize contacting, and the line resistance can not become excessive yet with the good of metal connecting line.Thereby wish to realize a kind of solar cell, it can be realized good electrical contact and have the less lead of line resistance under the situation that seldom adopts expensive electric conducting material (for example silver).
The utility model content
Therefore task of the present utility model is to realize a kind of solar cell, and the efficiency ratio of described solar cell was higher in the past, and was more cheap, and the wiring conductive material that needs still less and is realized good electrical contact.
This task is resolved by the theme of independent claims.Favourable improved procedure of the present utility model is the theme of dependent claims.
This task solves by a kind of like this solar cell, this solar cell has first plain conductor and at least one second plain conductor, described second plain conductor and described first plain conductor electrically contact and serve as bus, wherein, in described first and/or second plain conductor, at least one breach is set and is used to dwindle cross section.
In this breach, there is not electric conducting material, thereby still less uses electric conducting material.This not only can save material, but also reduces expenses.
Because described breach does not cover the surface of solar cell on these positions,, thereby under the situation that the solar cell external dimensions equates, can reach higher usefulness so solar cell can utilize more light.
Described first and/or second plain conductor preferably has breach along its whole length.Each breach on wire termination can be combined with recognition structure (Identifikationsstruktur) for mark, thereby needn't leave no choice but occupy the surface that should be used for transform light energy for this reason.Utilize the additional breach in the lead remaining area can obviously save conductor material in addition.Described breach can dwindle 5% to 100% by the cross section of described first and/or second plain conductor transmission of electricity so that be used for.Can realize in second plain conductor that particularly cross section dwindles less relatively breach, and can not significantly improve line resistance.Dwindled 100% o'clock at cross section, described plain conductor interrupts, thereby electric current no longer can pass through.The electric conducting material of conserve expensive quite significantly.Two parts that have second plain conductor in said embodiment.
Yet this situation is favourable when two parts of described plain conductor are utilized attached with metal strip (it is in parallel with described plain conductor) bridge joint.Described metal tape for example can be connected with described plain conductor by welding.This attached with metal strip preferably has a cross section, and this cross section equates with the cross section of the plain conductor that is bridged at least.This bridge joint by means of attached with metal strip also can make a plurality of solar cell interconnects become module.
Described first plain conductor preferably has 30 microns to 130 microns width.Utilize described size, described first plain conductor covers the surface of solar cell considerably lessly.Described second plain conductor preferably has maximum 2.5 millimeters width, thereby the line resistance on bus is very little, and provides enough width to come the welded bridge tape splicing.
Described breach can have circle, hexagon or rectangular cross section.This geometry for example can be made simply by etch process.
Description of drawings
Other advantages of the utility model and feature are described in conjunction with the following drawings, among the figure:
Fig. 1 illustrates the vertical view according to solar cell of the present utility model.
Embodiment
Utilize printed medium 10 to first plain conductor 1 of the printing of solar cell 100 printing widths 2 and second plain conductor 3 of width 4.First plain conductor 1 is thinner lead, and it can serve as the finger-like line in solar cell.Second plain conductor 3 is leads of broad, and itself and first plain conductor 1 electrically contact and serve as bus.In solar cell shown in Figure 1 100, second plain conductor 3 has circular breach 11 and rectangle breach 13.Breach 14 is set in addition, and it interrupts second plain conductor 3.This also can utilize breach 15 to realize.At breach 14, printed medium 10 forms line of demarcation 16.In execution mode shown in Figure 1, this line extends as the crow flies.Certainly line of demarcation 16 equally also can form agley.In the honeycomb fashion breach, extend in line of demarcation 16 only part orthoscopic.Printed medium 10 also can apply according to circle, rectangle or hexagonal geometries, thereby zone on every side forms breach.This breach also can be described to " negative pole ", and wherein, printed medium 10 forms " positive pole ". Breach 14 and 15 can occupy bigger surface, covers thereby only there is very little zone to be printed medium 10.These zones are enough to make the cheap metal band of bridge joint second plain conductor 3 can be disposed thereon, thereby can save the expensive raw material that is used for second plain conductor 3.
Solar cell can be made by means of screen printing technique, wherein, adopts screen printing stencil.For example etched screen printing stencil can so be constructed, that is, printed medium can not in- position 11,13,14 or 15, thereby forms breach in plain conductor.
Claims (7)
1. solar cell, it has first plain conductor and at least one second plain conductor, described second plain conductor and described first plain conductor electrically contact and serve as bus, it is characterized in that, in described first and/or second plain conductor, at least one breach is set and is used to dwindle cross section.
2. solar cell according to claim 1 is characterized in that, described first and/or second plain conductor has breach along its whole length.
3. solar cell according to claim 1 and 2 is characterized in that, at least one in these breaches makes the cross section that is used for by the transmission of electricity of described first and/or second plain conductor dwindle 5% to 100%.
4. solar cell according to claim 3 is characterized in that, utilizes additional metal to bring bridge joint to be provided with the described plain conductor of at least one breach, and described metal tape is in parallel with described plain conductor.
5. solar cell according to claim 1 and 2 is characterized in that, described first plain conductor has 30 microns to 130 microns width.
6. solar cell according to claim 1 and 2 is characterized in that, described second plain conductor has maximum 2.5 millimeters width.
7. solar cell according to claim 1 and 2 is characterized in that described breach has circle, hexagon or rectangular cross section.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009024876 | 2009-06-09 | ||
| DE102009024876.5 | 2009-06-09 | ||
| DE102009030498.3 | 2009-06-24 | ||
| DE102009030498 | 2009-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201859882U true CN201859882U (en) | 2011-06-08 |
Family
ID=42932800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202199731U Expired - Fee Related CN201859882U (en) | 2009-06-09 | 2010-06-09 | Solar cell |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3162103U (en) |
| CN (1) | CN201859882U (en) |
| DE (1) | DE202010007772U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5687506B2 (en) * | 2011-01-28 | 2015-03-18 | 三洋電機株式会社 | Solar cell and solar cell module |
-
2010
- 2010-06-09 CN CN2010202199731U patent/CN201859882U/en not_active Expired - Fee Related
- 2010-06-09 DE DE202010007772U patent/DE202010007772U1/en not_active Expired - Lifetime
- 2010-06-09 JP JP2010003919U patent/JP3162103U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3162103U (en) | 2010-08-19 |
| DE202010007772U1 (en) | 2010-10-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20130609 |