CN202049976U - Thin-film photovoltaic device - Google Patents
Thin-film photovoltaic device Download PDFInfo
- Publication number
- CN202049976U CN202049976U CN2010205954314U CN201020595431U CN202049976U CN 202049976 U CN202049976 U CN 202049976U CN 2010205954314 U CN2010205954314 U CN 2010205954314U CN 201020595431 U CN201020595431 U CN 201020595431U CN 202049976 U CN202049976 U CN 202049976U
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- Prior art keywords
- reflector
- photovoltaic device
- sheet material
- film photovoltaic
- reflectivity
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- Expired - Fee Related
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- 239000010409 thin film Substances 0.000 title abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 35
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 239000011521 glass Substances 0.000 claims description 26
- 238000002310 reflectometry Methods 0.000 claims description 21
- 230000000903 blocking effect Effects 0.000 claims description 15
- 239000011888 foil Substances 0.000 abstract description 20
- 239000004065 semiconductor Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract 3
- 238000004806 packaging method and process Methods 0.000 abstract 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000010030 laminating Methods 0.000 description 18
- 239000010408 film Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- 235000014692 zinc oxide Nutrition 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
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- 238000002360 preparation method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 239000005340 laminated glass Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 polyethylene butyraldehyde Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000005728 strengthening 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
- H01L31/0232—Optical elements or arrangements associated with the device
- H01L31/02327—Optical elements or arrangements associated with the device the optical elements being integrated or being directly associated to the device, e.g. back reflectors
-
- 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
- H01L31/048—Encapsulation of modules
- H01L31/049—Protective back sheets
-
- 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
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/056—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means the light-reflecting means being of the back surface reflector [BSR] type
-
- 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
- Y02E10/52—PV systems with concentrators
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The utility model provides a thin-film photovoltaic device which comprises a substrate, a first reflection layer and a second reflection layer, wherein a semiconductor-based photovoltaic conversion layer is arranged on the substrate, the first reflection layer and the second reflection layer are used for reflecting light penetrating through the substrate and the conversion layer back to the conversion layer, the first reflection layer is of a laminate foil with reflection characteristic concentrated in a region with short wavelength, and the second reflection layer has the reflection characteristic concentrated in a region with long wavelength. In the utility model, the thin laminated foil with certain reflection characteristic as well as an additional rear packaging cover is combined with another reflection layer. Most of light with short wavelength is reflected into an active layer of a photovoltaic battery by utilizing the reflection characteristic of the laminate foil, and the light with longer wavelength is reflected by the second reflection layer which is preferably arranged adjacent to the rear packaging cover. Therefore, the material cost can be lowered under the conditions of not damaging the reflection characteristic and the laminate characteristic of the foil.
Description
Technical field
The utility model relates generally to a kind of photovoltaic device.More specifically, the utility model relates to a kind of laminating foil that will have the thinning of some reflection characteristic and adds extra (i.e. independent preparation) combined photovoltaic device of rear seal-cover and another reflector.
Background technology
Photovoltaic solar is converted to people the distant view that generates electricity with a kind of eco-friendly means is provided.Yet, under present state, to compare with the electric power that provides by traditional power station, the electric energy that is provided by the photovoltaic energy converting unit is much still expensive.Therefore, in recent years, exploitation is used to produce the cost-benefit means of having more of photovoltaic energy converting unit and has caused concern.In the distinct methods of producing the low-cost solar battery, thin film silicon solar cell is because can be by for example plasma enhanced chemical vapor deposition (plasma enhanced chemical vapor deposition; PECVD) etc. well-known film deposition techniques preparation and be subjected to people and like.This kind solar panel generally is based on the glass substrate of rigidity and realizes, wherein the photovoltaic active layer is to be applied on the nonbreakable glass substrate by vacuum moulding machine.Because these semiconductor layers are very sensitive to environmental impacts such as for example moisture, thereby must encapsulate them.This is generally by finishing on the coated side that second glass substrate is laminated to described first substrate.In affiliated field, known use laminating foil engages described two glass substrates, and this laminating technology utilizes heat and pressure to finish the sealing assembling.If, then can even help not re-use independent reflector by making it demonstrate white to laminating foil cremasteric reflex white particle.
Main some photovoltaic (PV) manufacturing technology relevant with thin film silicon photovoltaic upper substrate demonstrates the light capture effect of improvement to the reflection of the photon that is not converted/collects by enhancing.Fig. 1 shows this kind layout: glass substrate or front glass 10 demonstrate the semi-conducting material sequence of layer that can realize photovoltaic effect.Described sequence of layer is called absorbed layer 11.Comprise transparent conductive material (transparent conductive material; TCO) transparent back contact 12 plays rear electrode.Reflector blocking 13 can " use " light lead back to again in the absorbed layer and together front glass and back glass laminates.The path of the arrow pilot light among Fig. 1.The incident light 16 that irradiation comes enters base substrate 10 to a great extent; Yet a certain ratio 17 is reflected.Partly be reflected paper tinsel 13 reflection and can reenter absorbed layer 11 of unabsorbed photon 18, thus the efficient of solar panel improved.Yet a certain ratio of light 19 is still by transmission and loss.
Generally speaking, reflection effect can obtain by following mode: utilize the metallization of back contact 12, perhaps utilize for example to be applied with reflecting medium such as reflectivity barrier coating on it or for example to be filled with TiO
2The polyethylene butyraldehyde (polyvinylbutyral, PVB), (ethylene vinyl acetate EVA) waits the transparent back contact 12 of the laminating foil 13 that is colored for paraffin or ethylene-vinyl acetate.These two kinds of solutions are since just going on the market many years ago, yet just recently just as the back reflector in the film photovoltaic (TF PV).
For reducing the material cost of TF PV module, must reduce the volume of material, in this kind situation the thickness of reflective layer blocking.Fig. 5 shows this kind layout with thin reflective layer blocking 13b.
Defective of the prior art
(13, thickness 13b) can cause the reflectivity of paper tinsel to descend and therefore cause transmissivity to raise to reduce laminating foil.Alleviating a kind of of this problem may be the content that increases the reflective pigments of paper tinsel.The shortcoming of this kind program is the restricted charging coefficient (charging factor) of laminating foil itself.In fact, this can cause losing reliability owing to the decline of the adhesion/disposal ability of paper tinsel itself.
The dependency relation of the transmissivity of Fig. 4 display light and wavelength and another parameter " laminating foil thickness ".Show conventional paper tinsel C and two comparisons of thin paper tinsel among the figure, wherein paper tinsel A is the thinnest.
The utility model content
The purpose of this utility model provides a kind of film photovoltaic device, can not damage under the situation of lamination characteristic of paper tinsel and reduce material cost not damaging reflection characteristic.
Film photovoltaic device of the present utility model comprises base substrate or front glass, the active absorbed layer of photovoltaic, back contact, reflection unit and back glass or back sheet material, the characteristics of described film photovoltaic device are that described reflection unit comprises two reflector of layered arrangement in regular turn.
In a preferred embodiment, first reflector in described two reflector comprises mainly at short wavelength zone (UV, the reflector blocking of reflecting blue light), and wherein second reflector comprises in fact in the longer wavelength zone (ruddiness, the reflector of reflecting in IR).
Useful technique effect of the present utility model is: reflection characteristic of the present utility model allows significantly to reduce the thickness of laminating foil under the situation of the encapsulation characteristic of not damaging paper tinsel itself; Paper tinsel and back sheet material/glass or supporting construction integrated can provide end structure behind a kind of complete integral.The utility model will make it possible to adjust by the preferred plan that finds the absorption of costs between laminating foil, back sheet material/glass and reflection characteristic the thickness of laminating foil.
Description of drawings
Fig. 1 shows the layout about thin film silicon photovoltaic upper substrate, and this substrate is by strengthening the light capture effect that the reflection of the photon that is not converted/collects is demonstrated improvement.
Fig. 2 shows the layout that sheet material after glass after the reflectivity or the reflectivity is used in combination with the reflective layer blocking.
Fig. 3 shows the influence of the transmissivity that has functional relation according to integrated back of the present utility model sheet material pair and wavelength.
The dependency relation of the transmissivity of Fig. 4 display light and wavelength and another parameter " laminating foil thickness ".
Fig. 5 shows the layout with laminating foil that thickness reduces.
Embodiment
As shown in Figure 2, film photovoltaic device of the present utility model, comprise base substrate or front glass 10, the active absorbed layer 11 of photovoltaic, back contact 12, reflection unit and back glass or back sheet material 15, the described reflection unit of described film photovoltaic device comprises two reflector 13a of layered arrangement in regular turn, 14.Described two reflector 13a, first reflector in 14 comprises the reflector blocking 13a that mainly reflects in the short wavelength zone, and wherein second reflector comprises the reflector of reflecting in fact 14 in the longer wavelength zone.Different with the reflectivity that wavelength has functional relation with the layer of being considered.In fact, according to reflective layer blocking 13a of the present utility model mainly in the short wavelength zone, to be higher than 85%, preferably greater than 90% reflectivity (mean value in each wave-length coverage) in essence between 400nm and 1100nm, more preferably between 500nm and 800nm, reflect, and reflector 14 or reflectivity sheet material/glass 14/15 in fact in the longer wavelength zone be higher than 95% or preferably greater than 99% reflectivity (being respectively the mean value in the described wave-length coverage) reflecting of 700nm to 1100nm between 500nm and 1400nm or preferably.
This make it possible to customize a kind of comprise with reflectivity after the special-purpose integrated back sheet material of sheet material/ glass 14,15 " lamination " reflective layer blocking 13a together, thereby can reduce operation in the production line.
As the material that is used for laminating foil, can use and all be filled with Chinese white (TiO for example
2EVA or other known white matt pigment), polyolefin, PVB, thermoplastic polyurethane (thermoplastic polyurethane, TPU), silicone, ionomer.Using TiO
2In the situation as Chinese white, according to the utility model, suggestion uses by weight greater than 7%, preferable greater than 9% feeding quantity.
For back sheet material/glass, the reflective material that is used for layer 14 can be Chinese white or the metal sheet that satisfies condition as listed above.
As shown in Figure 4, investigation shows, and reducing the influence of the influence comparison shorter wavelength of the longer wavelength of given spectrum of the thickness of reflective layer blocking is stronger.Therefore, if should use thin reflective layer blocking, then need by in photovoltaic layer piles up, arranging another reflector (for example by with its integration or be applied to sheet material/back glass 15 afterwards) to compensate the especially loss in the longer wavelength zone.This can obtain by sheet material after glass after the reflectivity or the reflectivity is used in combination with the reflective layer blocking.Fig. 2 shows this kind layout, and wherein thin reflective layer blocking and extra reflector 14 are arranged in regular turn.
Fig. 3 shows the influence of this kind according to the present invention integrated back sheet material (sheet material after reflective layer blocking and the reflectivity) to the transmissivity that has functional relation with wavelength.
Should emphasize two aspects:
The reflection characteristic that is customized allows significantly to reduce the thickness of laminating foil under the situation of the encapsulation characteristic of not damaging paper tinsel itself.
Can on the standard laminating apparatus, finish to according to laminating foil of the present utility model and to the back sheet material/glass processing.Need remove the air accumulation in the layered product rightly and enough temperature and pressure is provided, to set up adhesion by laminating foil.Vacuum should be lower than the 10mbar negative pressure; Temperature of heating plate should be in 130 ℃ to 170 ℃ scopes.According to modular design (contact etc.) decide, the pressure of plate need be in 500mbar to 900mbar scope.Can realize 3 minutes to 6 minutes processing time that is used for degasification and 5 minutes to 9 minutes the processing time that is used to pressurize; This makes and can carry out fast processing with short pitch time.After lamination, cool off at cold press or in air cooled buffer and make it possible to proceed next production stage.
Claims (10)
1. film photovoltaic device, comprise base substrate or front glass (10), the active absorbed layer (11) of photovoltaic, back contact (12), reflection unit and back glass or back sheet material (15), described film photovoltaic device (1) is characterised in that, described reflection unit comprises two reflector (13a, 14) of layered arrangement in regular turn.
2. film photovoltaic device as claimed in claim 1, it is characterized in that, described two reflector (13a, 14) first reflector in comprises the reflector blocking (13a) of mainly reflecting in the short wavelength zone, and wherein second reflector comprises the reflector of reflecting in fact (14) in the longer wavelength zone.
3. film photovoltaic device as claimed in claim 2, it is characterized in that, to be higher than 85% reflectivity between 400nm and the 1100nm, reflect between 500nm and 800nm with the reflectivity greater than 90%, described reflectivity is the mean value in each wave-length coverage in fact in described reflector blocking (13a).
4. as each described film photovoltaic device in claim 2 or 3, it is characterized in that, to be higher than 95% reflectivity between 500nm and the 1400nm, reflect between 700nm and 1100nm with the reflectivity greater than 99%, described reflectivity is the mean value in described wave-length coverage in fact in described reflector (14).
5. film photovoltaic device as claimed in claim 2 is characterized in that, described reflector (14) and described back sheet material (15) are combined into sheet material after the reflectivity.
6. film photovoltaic device as claimed in claim 3 is characterized in that, described reflector (14) and described back sheet material (15) are combined into sheet material after the reflectivity.
7. as each described film photovoltaic device in the claim 1,2,3 or 6, it is characterized in that described back sheet material (15) is to be made by glass or multiple field polymeric material.
8. film photovoltaic device as claimed in claim 4 is characterized in that, described reflector (14) and described back sheet material (15) are combined into sheet material after the reflectivity.
9. film photovoltaic device as claimed in claim 4 is characterized in that, described back sheet material (15) is to be made by glass or multiple field polymeric material.
10. film photovoltaic device as claimed in claim 5 is characterized in that, described back sheet material (15) is to be made by glass or multiple field polymeric material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US25280509P | 2009-10-19 | 2009-10-19 | |
| US61/252,805 | 2009-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202049976U true CN202049976U (en) | 2011-11-23 |
Family
ID=43829153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205954314U Expired - Fee Related CN202049976U (en) | 2009-10-19 | 2010-10-19 | Thin-film photovoltaic device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202049976U (en) |
| DE (1) | DE202010008834U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113416501A (en) * | 2021-06-16 | 2021-09-21 | 常州百佳年代薄膜科技股份有限公司 | Composite adhesive film, photovoltaic module and irradiation light reflection method for composite adhesive film |
-
2010
- 2010-10-19 CN CN2010205954314U patent/CN202049976U/en not_active Expired - Fee Related
- 2010-10-19 DE DE202010008834U patent/DE202010008834U1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113416501A (en) * | 2021-06-16 | 2021-09-21 | 常州百佳年代薄膜科技股份有限公司 | Composite adhesive film, photovoltaic module and irradiation light reflection method for composite adhesive film |
Also Published As
| Publication number | Publication date |
|---|---|
| DE202010008834U1 (en) | 2011-03-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: OERLIKON SOLAR AG Free format text: FORMER NAME: OERLIKON SOLAR ENERGY (CHUBEIQU CITY) AG |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Swiss Tur Ray Bbu Bach Patentee after: Oerlikon Solar AG, Truebbach Address before: Swiss Tur Ray Bbu Bach Patentee before: Oerlikon Solar AG, TRUBBACH |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20151019 |
|
| EXPY | Termination of patent right or utility model |