CN202268364U - Light transmission type thin film solar cell - Google Patents
Light transmission type thin film solar cell Download PDFInfo
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- CN202268364U CN202268364U CN2011202931226U CN201120293122U CN202268364U CN 202268364 U CN202268364 U CN 202268364U CN 2011202931226 U CN2011202931226 U CN 2011202931226U CN 201120293122 U CN201120293122 U CN 201120293122U CN 202268364 U CN202268364 U CN 202268364U
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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
Abstract
The utility model provides a light transmission type thin film solar cell. The thin film solar cell at least comprises a substrate, a front electrode layer, a light absorption layer, a back electrode layer, a light transmittance augmentation layer, an encapsulation layer and a plurality of light transmission areas which are stavked in sequence, wherein any light transmission area at least passes through the back electrode layer and at most passes through the back electrode layer and the photoelectric absorption layer; the light transmittance augmentation layer and the encapsulation layer extend into the light transmission areas; the light transmission areas are filled by the encapsulation layer positioned in the light transmission areas; and the refractive index of the light transmittance augmentation layer is positioned between the refractive index of media covered by the light transmittance augmentation layer in the light transmission areas and the refractive index of media covering the light transmittance augmentation layer. The light transmission type thin film solar cell has the advantages that the light transmittance of the solar cell is increased, the photoelectric conversion efficiency of the light absorption layer can be maintained within a needed range, the purpose of giving consideration to both the light transmittance and the photoelectric conversion efficiency is achieved, the problem of application restriction caused by restricted light transmittance of the conventional light transmission type solar cell is solved, and the applicability and the use popularization rate of the light transmission type thin film solar cell are expanded.
Description
Technical field
The utility model belongs to the photovoltaic power generation technology field, particularly relates to a kind of translucent thin-film solar Battery And Its Manufacturing Methods, and especially a kind of nationality promotes the translucent thin-film solar battery of light transmittance by promoting the transmission region light transmittance.
Background technology
Solar cell (SOLAR CELL) is the energy conversion apparatus of a kind of cleaning and environmental protection, and the kind of solar cell can be divided into solar cells made of crystalline silicon, non-crystal silicon solar cell, III-V compounds of group solar cell and II-VI compounds of group solar cell etc. haply according to its material at present.The structure of solar cell mainly comprises substrate, preceding electrode layer; Absorbed layer and dorsum electrode layer, the material of preceding electrode layer can be TCO, and the material of dorsum electrode layer can be metal etc.; Absorbed layer is essentially the structure of a p-n diode; In incident light gets into the p-n diode, produce electron hole pair, and the past opposite direction in electronics and hole is moved by the internal electric field effect, and two termination electrode output voltage volt separately.
Solar cell can be arranged on top of building or other are prone to receive the place of sunlight; Yet when solar cell is arranged at glass curtain wall etc. when having light to get into the place of interior of building; If the back electrode of solar cell is a metal material; Intercepted by metal back electrode or because of metallic reflection can't the penetrating metal back electrode and inlet chamber in, cause the solar cell application scope extremely to limit.
Though existing technological nationality can be promoted the light transmittance of solar cell by offering groove or cavity; Yet the increase of light transmittance is limited like this; In addition; Because groove or being provided with of hole possibly remove part photoelectricity conversion coating, offer too much groove or hole for promoting light transmittance, can reduce the photoelectric conversion efficiency of solar cell on the contrary.Therefore keep certain electricity conversion, the face of the offering number needs of groove or hole is wanted certain limitation, so present stage is promoted the still extremely restriction of light transmittance of light-transmission type solar cell.
The utility model content
The purpose of the utility model is to design a kind of novel translucent thin-film solar battery, utilizes the printing opacity place to have the setting of specific refractive index material layer, addresses the above problem, and reaches the purpose of effective lifting light transmittance.
To achieve these goals, the technical scheme of the utility model employing is following:
A kind of translucent thin-film solar battery comprises the substrate that piles up formation in regular turn, preceding electrode layer, light absorbing zone, dorsum electrode layer, light transmittance enhancement layer, encapsulated layer and several transmission regions at least; Any said transmission region runs through said dorsum electrode layer at least; Run through said dorsum electrode layer and said photoelectric absorption layer at the most; Said light transmittance enhancement layer and said encapsulated layer extend in the said transmission region, the refractive index of the said light transmittance enhancement layer institute overwrite media of the refractive index of said light transmittance enhancement layer in said transmission region and covering between the refractive index of medium of said light transmittance enhancement layer.
The said encapsulated layer that is positioned at said transmission region fills up said transmission region, and the medium that covers said light transmittance enhancement layer is said encapsulated layer;
When said transmission region runs through said dorsum electrode layer and said photoelectric absorption layer simultaneously, be positioned at medium that the said light transmittance enhancement layer of said transmission region covered and be said before electrode layer; Otherwise being positioned at the medium that the said light transmittance enhancement layer of said transmission region covered is said light absorbing zone.
The material of said light transmittance enhancement layer is an insulator; The material of said encapsulated layer is a material one; The material of said light absorbing zone is a material two; The material of electrode layer is a transparent conductive oxide before said, and said transparent conductive oxide is a material three; The material of said substrate is a material four; Comprise metal in the material of said dorsum electrode layer, said metal is a material five.
The material of said light absorbing zone is a cadmium telluride.
Said substrate is a transparency carrier.
The material of said substrate is a material six.
Electrode layer is a transparent conductive material layer before said; Said light absorbing zone is the material layer that can be used in cladding plate type thin-film solar cells and have opto-electronic conversion usefulness; Said dorsum electrode layer is the material layer of conductivity.
The refractive index of said light transmittance enhancement layer is 1～4.
The so-called material one of the utility model is selected from the group that is made up of ethyl acetate and polyethylene butyraldehyde; The so-called material two of the utility model is selected from the group that is made up of amorphous silicon, polysilicon, microcrystal silicon and crystallite SiGe; The so-called material three of the utility model is selected from by tin indium oxide, indium zinc oxide, aluminum zinc oxide, boron oxide zinc, the group that gallium oxide zinc and zinc oxide (ZNO) are formed; The so-called material four of the utility model is selected from the group that is made up of glass, quartz, perspex, transparent polymer and pliability plastic cement; The so-called material five of the utility model is selected from the group that is made up of aluminium, nickel, gold, silver, chromium, titanium and palladium; The so-called material six of the utility model is selected from the group that is made up of soda-lime glass, low-white glass and other unorganic glasses.
In the utility model, the material of light transmittance enhancement layer is insulator (insulation); The material of encapsulated layer be selected from by ethyl acetate (ethylene vinyl acetate copolymer, EVA) and polyethylene butyraldehyde (polyviny butyral, the group that PVB) is formed.
The material of light absorbing zone be selected from by amorphous silicon (a-Si), polysilicon, microcrystal silicon (microcrystalline silicon, mc-Si) and crystallite SiGe (microcrysatlline silicon germanium; Mc-SiGe) group that is formed, the material of preferred light absorbing zone is cadmium telluride (CdTe).
Material transparent conductive oxide (the transparent conducting oxide of preceding electrode layer; TCO); Wherein this transparent conductive oxide is selected from by tin indium oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO); Boron oxide zinc (BZO), the group that gallium oxide zinc (GZO) and zinc oxide (ZNO) are formed.
The material of substrate is selected from the group that is made up of glass, quartz, perspex, transparent polymer and pliability plastic cement; When substrate was transparency carrier, its material was selected from by soda-lime glass (SLG), the group that low-white glass and other unorganic glasses are formed.
To achieve these goals; The utility model provides a kind of translucent thin-film solar battery; At least comprise the substrate that piles up formation in regular turn, preceding electrode layer, light absorbing zone, dorsum electrode layer, light transmittance enhancement layer and the encapsulated layer of setting; At least in said dorsum electrode layer, be provided with several transmission regions and can further extend to light absorbing zone or preceding electrode layer from dorsum electrode layer; Wherein part light transmittance enhancement layer and part encapsulated layer are positioned at these transmission regions, and the encapsulated layer that is positioned at this transmission region fills up those transmission regions; Between the medium refraction index of the refractive index of the refractive index of this light transmittance enhancement layer this light transmittance enhancement layer institute overwrite media in these transmission regions and this light transmittance enhancement layer of covering; Wherein the medium that covered of light transmittance enhancement layer comprises light absorbing zone or preceding electrode layer; The medium that covers the light transmittance enhancement layer comprises encapsulated layer; That is the refractive index of light transmittance enhancement layer can be 1-4, and nationality can promote that by the setting of the light transmittance enhancement layer with specific refractive index the incident light in the transmission region penetrates light absorbing zone or dorsum electrode layer; And in the inlet chamber, with the light transmittance of effective lifting translucent thin-film solar battery
In addition, the material of light transmittance enhancement layer can be insulator (insulation), and nationality is with the protection dorsum electrode layer, and can provide and encapsulated layer between good adhesiveness (adhesion), to promote packaging effect.
Enhancement layer of light transmittance described in the utility model and said encapsulated layer extend in the said transmission region; And the said encapsulated layer that is positioned at said transmission region fills up said transmission region, the refractive index of the said light transmittance enhancement layer institute overwrite media of the refractive index of said light transmittance enhancement layer in said transmission region and covering between the refractive index of medium of said light transmittance enhancement layer.
The material of this each structure sheaf of thin-film solar cells of the utility model is respectively: the material of encapsulated layer is selected from by ethyl acetate (ethylene vinyl acetate copolymer; EVA) and polyethylene butyraldehyde (polyvinyl butyral, PVB) group that is formed; Light absorbing zone 230 materials be selected from by non-crystalline silicon (a-Si), polysilicon, microcrystal silicon (microcrystalline silicon, mc-Si) and crystallite SiGe (microcrysatlline silicon germanium; Mc-SiGe) group that is formed, or can be cadmium telluride materials such as (CdTe), but be not limited thereto, all materials that can be applicable to cladding plate type (superstrate) thin-film solar cells and have opto-electronic conversion usefulness all can be applicable to this; The material of preceding electrode layer is transparent conductive oxide (TCO), and this transparent conductive oxide is selected from by tin indium oxide (ITO), selenium oxide zinc (IZO), aluminum zinc oxide (AZO), boron oxide zinc (BZO), the group that gallium oxide zinc (GZO) and zinc oxide (ZNO) are formed; The material of substrate is selected from the group that is made up of glass, quartz, transparent plastic, transparent polymer and pliability plastics, and when substrate is a transparent glass substrate, its material is selected from soda-lime glass, low-white glass, and the group that forms of no soda-lime glass; The material of dorsum electrode layer 240 comprises metal, for example is selected from the group that is made up of aluminium, nickel, gold, silver, chromium, titanium and palladium; But not as limit, every light-permeable and the material with electric conductivity all can be applicable to this.
Because the refractive index of light transmittance enhancement layer can be adjusted according to the refractive index of the material kind of its overwrite media and the refractive index that is covered in the material kind of medium on the light transmittance enhancement layer; Nationality is by the setting of the light transmittance enhancement layer with specific refractive index; Can promote the incident light in the transmission region to penetrate light absorbing zone or dorsum electrode layer, with the light transmittance of effective lifting translucent thin-film solar battery.The setting that has the light transmittance enhancement layer of specific refractive index in the utility model translucent thin-film solar battery; The feelings that can reduce the light absorbing zone absorptivity not offering too much transmission region are avaled; Increase the light transmittance of solar cell; The photoelectric transformation efficiency of light absorbing zone can be kept within the required range; Reach the purpose of taking into account light transmittance and opto-electronic conversion usefulness, and solve the limited use problem that the existing limited light transmittance of light-transmission type solar cell is caused, expanded the application and use popularity rate of translucent thin-film solar battery.
The utility model is a kind of translucent thin-film solar battery that is applied to field of photovoltaic power generation, can be used in BIPV etc. and require light to inject indoor place; The utility model utilizes the printing opacity place to have the setting of special refraction materials layer, reaches the purpose of effective lifting light transmittance.
The beneficial effect of the utility model is following:
(1) setting that has the light transmittance enhancement layer of specific refractive index in the translucent thin-film solar battery of the utility model; The feelings that can reduce the light absorbing zone absorptivity not offering too much transmission region are avaled; Increase the light transmittance of solar cell; The photoelectric transformation efficiency of light absorbing zone can be kept within the required range; Reach the purpose of taking into account light transmittance and opto-electronic conversion usefulness, and solve the limited use problem that the existing limited light transmittance of light-transmission type solar cell is caused, expanded the application and use popularity rate of translucent thin-film solar battery.
(2) the utility model can be taken into account light transmittance and opto-electronic conversion usefulness, increases the light transmittance of solar cell, and the photoelectric conversion efficiency of light absorbing zone can be kept within the required range.
(3) the utility model is simple in structure, and manufacturing process is simple, and manufacturing cost is lower.
Description of drawings
Fig. 1 is the structural representation of translucent thin-film solar battery in the utility model.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with accompanying drawing and embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
A kind of translucent thin-film solar battery as shown in Figure 1; Be the preferred embodiment of one of the utility model translucent thin-film solar battery structure; This thin-film solar cells comprises substrate 210, preceding electrode layer 220, light absorbing zone 230, dorsum electrode layer 240, light transmittance enhancement layer 250 and an encapsulated layer 260 that stacks gradually formation from the incident light side at least; On the encapsulated layer 260 a packaged glass layer can be set again; At least in said back electrode 240, offer and be formed with a plurality of transmission regions 280; Wherein part light transmittance enhancement layer 250 and part encapsulated layer position 260 be in these transmission regions 280, and the encapsulated layer 260 that is positioned at this transmission region 280 fills up into a little transmission regions 280.The refractive index of light rate enhancement layer 250 can its overwrite media material kind refractive index and the refractive index that covers the material kind of medium on the light rate enhancement layer 250 adjust; The refractive index of light transmittance enhancement layer 250 250 overwrite medias of this light transmittance enhancement layer in these transmission regions 280 are that the medium that covers this light transmittance enhancement layer 250 in 230 tool refractive indexes of light absorbing zone and this transmission region 280 is between 260 tool refractive indexes of encapsulated layer in the example therewith, that is the refractive index of light transmittance enhancement layer 250 is between 230 tool refractive indexes of light absorbing zone and 260 tool refractive indexes of encapsulated layer.
In addition; Those transmission regions 280 can further extend to light absorbing zone 230 or extend and offer to preceding electrode layer 220 from dorsum electrode layer 240; In addition; The refractive index of light transmittance enhancement layer 250 covers this light transmittance enhancement layer 250 in this light transmittance enhancement layer 250 overwrite media institutes tool refractive index and this transmission region 280 in these transmission regions 280 medium is between 260 tool refractive indexes of encapsulated layer; That is the refractive index of light transmittance enhancement layer 250 is between 220 tool refractive indexes of preceding electrode layer and 260 tool refractive indexes of encapsulated layer, and nationality is to promote the penetrance of incident light.
The material of this each structure sheaf of thin-film solar cells is respectively:
The material of substrate 210 is selected from the group that is made up of glass, quartz, transparent plastic, transparent polymer and pliability plastics, and when substrate is a transparent glass substrate, its material is selected from soda-lime glass, low-white glass, and the group that forms of no soda-lime glass.
The material of preceding electrode layer 220 is transparent conductive oxide (TCO); This transparent conductive oxide is selected from by tin indium oxide (ITO), selenium oxide zinc (IZO); Aluminum zinc oxide (AZO), boron oxide zinc (BZO), the group that gallium oxide zinc (GZO) and zinc oxide (ZNO) are formed; But not as limit, every light-permeable and the material with conductivity all can be applicable to this.
Light absorbing zone 230 materials be selected from by non-crystalline silicon (a-Si), polysilicon, microcrystal silicon (microcrystalline silicon, mc-Si) and crystallite SiGe (microcrysatlline silicon germanium; Mc-SiGe) group that is formed, or can be cadmium telluride materials such as (CdTe), but be not limited thereto, all materials that can be applicable to cladding plate type (superstrate) thin-film solar cells and have opto-electronic conversion usefulness all can be applicable to this.
The material of dorsum electrode layer 240 comprises metal, for example is selected from the group that is made up of aluminium, nickel, gold, silver, chromium, titanium and palladium, and other materials with conductivity also can be applicable to this.
The material of encapsulated layer 260 be selected from by ethyl acetate (ethylene vinyl acetate copolymer, EVA) and polyethylene butyraldehyde (polyvinyl butyral, the group that PVB) is formed.
The material of light transmittance enhancement layer 250 has specific refractive index, and the refractive index of the light transmittance enhancement layer institute overwrite media of the numerical value of this refractive index in transmission region and cover the light transmittance enhancement layer the refractive index that medium had between.The refractive index of light transmittance enhancement layer can be between 1-4, and used material also can be the material with refractive index 1-4, for example comprises the material of silicon dioxide (SiO2) etc.
Above-mentioned each coating systems of translucent thin-film solar battery can successively pile up formation with existing method in regular turn; This method can comprise sputter, aumospheric pressure cvd, low-pressure chemical vapor deposition; The electron cyclotron resonace method; The direct current glow discharge method, rf glow discharge method etc., but not as limit.Every method that can on one deck body, form another layer body all can be applicable to this; In addition; Those transmission regions can be formed by the laser mode, and the mode of the chemical vapour deposition (CVD) then capable of using of light transmittance enhancement layer, physical vapour deposition (PVD) is inserted it in transmission region 280.
In sum; Nationality is by the setting of the light transmittance enhancement layer 250 with specific refractive index; Can promote the light transmittance that gets into the incident light in the transmission region 280; And promote incident light to penetrate the probability of light absorbing zone 230 and back electrode 240, and increase indoor transmittance amount, reach the purpose of effective lifting translucent thin-film solar battery light transmittance.
More than through the detailed description of concrete and preferred embodiment the utility model; But those skilled in the art should be understood that; The utility model is not limited to the above embodiment; In all spirit and principles at the utility model, any modification of being done, be equal to replacement etc., all should be included in the utility model protection range in.
Claims (6)
1. a translucent thin-film solar battery is characterized in that: comprise the substrate that piles up formation in regular turn, preceding electrode layer, light absorbing zone, dorsum electrode layer, light transmittance enhancement layer, encapsulated layer and several transmission regions at least; Any said transmission region runs through said dorsum electrode layer at least; Run through said dorsum electrode layer and said photoelectric absorption layer at the most; Said light transmittance enhancement layer and said encapsulated layer extend in the said transmission region, the refractive index of the said light transmittance enhancement layer institute overwrite media of the refractive index of said light transmittance enhancement layer in said transmission region and covering between the refractive index of medium of said light transmittance enhancement layer.
2. translucent thin-film solar battery according to claim 1 is characterized in that: the said encapsulated layer that is positioned at said transmission region fills up said transmission region, and the medium that covers said light transmittance enhancement layer is said encapsulated layer;
When said transmission region runs through said dorsum electrode layer and said photoelectric absorption layer simultaneously, be positioned at medium that the said light transmittance enhancement layer of said transmission region covered and be said before electrode layer; Otherwise being positioned at the medium that the said light transmittance enhancement layer of said transmission region covered is said light absorbing zone.
3. translucent thin-film solar battery according to claim 2 is characterized in that: the material of said light absorbing zone is a cadmium telluride.
4. translucent thin-film solar battery according to claim 2 is characterized in that: said substrate is a transparency carrier.
5. translucent thin-film solar battery according to claim 1 is characterized in that: electrode layer is a transparent conductive material layer before said; Said light absorbing zone is the material layer that can be used in cladding plate type thin-film solar cells and have opto-electronic conversion usefulness; Said dorsum electrode layer is the material layer of conductivity.
6. translucent thin-film solar battery according to claim 1 is characterized in that: the refractive index of said light transmittance enhancement layer is 1～4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202931226U CN202268364U (en) | 2011-08-11 | 2011-08-11 | Light transmission type thin film solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202931226U CN202268364U (en) | 2011-08-11 | 2011-08-11 | Light transmission type thin film solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202268364U true CN202268364U (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202931226U Expired - Fee Related CN202268364U (en) | 2011-08-11 | 2011-08-11 | Light transmission type thin film solar cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202268364U (en) |
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2011
- 2011-08-11 CN CN2011202931226U patent/CN202268364U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xiao Jun Inventor after: Chai Weichun Inventor before: Xiao Jun Inventor before: Chai Weichun Inventor before: Qiu Litao |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: XIAO JUN CHAI WEICHUN QIU LITAO TO: XIAO JUN CHAI WEICHUN |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20130811 |