WO2005106968A1 - カルコパイライト型太陽電池 - Google Patents
カルコパイライト型太陽電池 Download PDFInfo
- Publication number
- WO2005106968A1 WO2005106968A1 PCT/JP2005/007783 JP2005007783W WO2005106968A1 WO 2005106968 A1 WO2005106968 A1 WO 2005106968A1 JP 2005007783 W JP2005007783 W JP 2005007783W WO 2005106968 A1 WO2005106968 A1 WO 2005106968A1
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- WO
- WIPO (PCT)
- Prior art keywords
- layer
- solar cell
- substrate
- electrode
- chalcopyrite
- 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.)
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Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F10/00—Individual photovoltaic cells, e.g. solar cells
- H10F10/10—Individual photovoltaic cells, e.g. solar cells having potential barriers
- H10F10/16—Photovoltaic cells having only PN heterojunction potential barriers
- H10F10/167—Photovoltaic cells having only PN heterojunction potential barriers comprising Group I-III-VI materials, e.g. CdS/CuInSe2 [CIS] heterojunction photovoltaic cells
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/10—Semiconductor bodies
- H10F77/16—Material structures, e.g. crystalline structures, film structures or crystal plane orientations
- H10F77/169—Thin semiconductor films on metallic or insulating substrates
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/10—Semiconductor bodies
- H10F77/16—Material structures, e.g. crystalline structures, film structures or crystal plane orientations
- H10F77/169—Thin semiconductor films on metallic or insulating substrates
- H10F77/1694—Thin semiconductor films on metallic or insulating substrates the films including Group I-III-VI materials, e.g. CIS or CIGS
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/10—Semiconductor bodies
- H10F77/16—Material structures, e.g. crystalline structures, film structures or crystal plane orientations
- H10F77/169—Thin semiconductor films on metallic or insulating substrates
- H10F77/1696—Thin semiconductor films on metallic or insulating substrates the films including Group II-VI materials, e.g. CdTe or CdS
-
- 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
- Y02E10/541—CuInSe2 material PV cells
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a chalcopyrite solar cell having an insulating substrate containing a my force.
- a chalcopyrite-type solar cell is a solar cell that includes a chalcopyrite conjugate as typified by Cu (inGa) Se (hereinafter also referred to as CIGS! As a light absorbing layer, and has a high energy conversion efficiency. It has attracted particular attention because it has various advantages such as high light resistance, little light degradation due to aging, excellent radiation resistance, a wide light absorption wavelength range, and a large light absorption coefficient. Various considerations have been made to! /
- this type of chalcopyrite solar cell 10 is provided by stacking a laminate 14 on a glass substrate 12.
- the laminated body 14 has a first electrode 16 made of Mo, a light absorption layer 18 made of CIGS, and a light absorption layer 18 having a basic structure of a transparent second electrode 20 made of ZnOZAl.
- a buffer layer 22 and a high-resistance layer (semi-insulating layer) 24 for achieving band gap matching with the light absorption layer 18 are interposed between the second electrode 20 and the second electrode 20.
- an anti-reflection layer 26 is provided for preventing light incident on the light absorption layer 18 from being reflected and leaking to the outside.
- Each of the buffer layer 22, the high-resistance layer 24, and the antireflection layer 26 is made of, for example, CdS, ZnO, or MgF.
- any one of the buffer layer 22 and the high-resistance layer 24 can be formed.
- a part of the first electrode 16 is also exposed to a laminate 14 force, and a first lead portion 28 is provided at the exposed portion.
- a part of the second electrode 20 is also exposed from the antireflection layer 26, and a second lead portion 30 is provided in the exposed part.
- the chalcopyrite solar cell 10 configured as described above When the chalcopyrite solar cell 10 configured as described above is irradiated with light such as sunlight, a pair of electrons and holes is generated in the light absorption layer 18.
- a pair of electrons and holes At the bonding interface between the CIGS light absorbing layer 18 as a P-type semiconductor and the second electrode 20 as an N-type semiconductor, electrons The holes collect at the interface of the light absorbing layer 18 (P-type side) while being collected at the interface of the 20 (N-type side).
- an electromotive force is generated between the light absorbing layer 18 and the second electrode 20.
- the electric energy generated by the electromotive force is taken out as an electric current from the first lead portion 28 and the second lead portion 30 connected to the first electrode 16 and the second electrode 20, respectively.
- the chalcopyrite solar cell 10 shown in Fig. 5 is usually manufactured as follows. That is, first, the first electrode 16 made of Mo is formed on the glass substrate 12 having the same strength as soda lime glass by sputtering film formation.
- the first electrode 16 is divided by irradiating a laser beam. This operation is called scribe.
- Cu, In, and Ga are deposited on the first electrode 16 by sputtering film formation to provide a precursor.
- This precursor is accommodated in a heat treatment furnace together with the substrate and the first electrode 16, and annealed in a HSe gas atmosphere.
- the precursor is selenized at the time of the neal, and the light absorbing layer 18 made of CIGS is formed.
- an N-type buffer layer 22 of CdS, ZnO, InS or the like is provided on the light absorption layer 18.
- the buffer layer 22 is formed by, for example, sputtering film formation or chemical bath deposition (CBD).
- the high-resistance layer 24 of ZnO or the like by sputtering film formation or the like, scribe the high-resistance layer 24, the buffer layer 22, and the light absorption layer 18 using a laser beam or a metal needle. I do. That is, the high resistance layer 24, the buffer layer 22, and the light absorption layer 18 are divided.
- the second electrode 20 made of ZnOZAl is provided by sputtering film formation, the second electrode 20, the high resistance layer 24, the buffer layer 22, and the light absorption layer 18 are formed using laser light or a metal needle. Perform a scribe.
- first lead portion 28 and a second lead portion 30 are provided on the exposed portions of the first electrode 16 and the second electrode 20, respectively. Thereby, the chalcopyrite solar cell 10 is obtained.
- the chalcopyrite-type solar cell 10 obtained in this manner is a cell.
- a cell in which a plurality of cells are electrically connected to each other and are enlarged in a panel shape is used for practical use. Is done.
- glass is selected as the material of the substrate. This is because it is easily available and inexpensive, and the surface is smooth, so that the surface of the film deposited on the substrate can be made relatively smooth, and moreover, the sodium in the glass is reduced. This is because energy conversion efficiency increases as a result of diffusion to the light absorption layer.
- Patent Document 1 proposes a chalcopyrite solar cell using a polymer film as a substrate.
- Patent Document 2 discloses stainless steel as a material for a substrate of a chalcopyrite fuel cell
- Patent Document 3 discloses glass, alumina, my force, polyimide, molybdenum, tungsten, nickel, and graphite. Ait and stainless steel are listed.
- this stainless steel substrate is provided with a protective layer made of SiO or FeF to prevent the selenium force from being attacked during selenium bonding.
- Patent Document 1 Japanese Patent Application Laid-Open No. 5-259494
- Patent Document 2 JP 2001-339081 A
- Patent Document 3 Japanese Patent Application Laid-Open No. 2000-58893
- Patent Document 2 has an aspect that it is difficult to say that the protection of the stainless steel substrate by the protective layer is sufficient. That is, in some cases, the stainless substrate may be corroded during selenization, and the first electrode may fall off. In addition, since the conductive layer is exposed and the conductive stainless steel substrate is exposed, scribing using a metal needle cannot be performed.
- Patent Document 3 various materials are listed as the material of the substrate, but the substrates of the chalcopyrite solar cell disclosed in Patent Document 3 are all glass substrates. For this reason, it is not clear whether corrosion can be avoided at the time of selenium even if other materials are used. For example, when a laminated body is provided using a laminated my force in which my force particles are bonded by resin as a substrate, it is recognized that the laminated body easily falls off the laminated my force substrate force, and that the energy conversion efficiency decreases.
- a general object of the present invention is to provide a chalcopyrite solar cell that can be mass-produced.
- a main object of the present invention is to provide a chalcopyrite type solar cell having high energy conversion efficiency and high open circuit voltage.
- Another object of the present invention is to provide a chalcopyrite solar cell that can prevent the substrate laminate from falling off.
- a first electrode made of a metal, a light absorbing layer formed on the first electrode and made of a chalcopyrite compound which is a P-type semiconductor, and a light absorbing layer
- a chalcopyrite solar cell having a laminate with a second electrode formed of an N-type semiconductor thereon,
- My force is included in the insulating substrate holding the laminate
- a chalcopyrite solar cell in which at least a binder layer functioning as a binder is interposed between the insulating substrate and the laminate.
- My power is rich in flexibility. For this reason, for example, it is possible to form a substrate by winding and sending out a mica to be described later and cutting it into a predetermined size. In other words, it is possible to wind the collected my strength into a roll, so that the roll-to- It is easy to adopt a process. That is, mass production of chalcopyrite solar cells can be achieved.
- the precursor of Cu, In, and Ga adhered on the first electrode to form the light absorbing layer has a higher H resistance.
- Selenization can be performed at about 600 to 700 ° C. Under such conditions, the precursor can be surely advanced, so that a chalcopyrite solar cell having a large open circuit voltage (open voltage) can be constructed.
- the binder layer is interposed between the my-force substrate and the laminate, the bonding strength between the my-force substrate and the laminate is ensured. For this reason, it is possible to prevent the stacked body from falling off the my-force substrate.
- the presence of the binder layer prevents impurities contained in the my-force substrate from diffusing into the light absorbing layer. For this reason, the energy conversion efficiency of the chalcopyrite solar cell can be improved.
- a material containing TiN or TaN can be mentioned.
- the thickness of the binder layer is preferably 0.5 to 1 ⁇ m.
- suitable materials for the insulating substrate include powdery and granular My powers and integrated My powers that are fired after the resin is mixed.
- FIG. 1 is a schematic longitudinal sectional view of a chalcopyrite solar cell according to the present embodiment.
- FIG. 2 is an enlarged view of a main part of FIG. 1.
- FIG. 3 is a schematic longitudinal sectional view of a chalcopyrite solar cell according to another embodiment.
- FIG. 4 is a schematic longitudinal sectional view of a chalcopyrite solar cell according to another embodiment.
- FIG. 5 is a schematic longitudinal sectional view of a chalcopyrite solar cell according to a conventional technique.
- FIG. 1 is a schematic longitudinal sectional view of chalcopyrite solar cell 50 according to the present embodiment.
- the chalcopyrite solar cell 50 includes a substrate 52, a laminate 14, a smoothing layer 54 and a binder layer 56 interposed between the substrate 52 and the laminate 14.
- the substrate 52 is formed by an integrated my force.
- the integrated mica refers to one that is fired after mixing the powdered and granular my power and the resin.
- assembly Mai force has a resistance value is significantly greater insulators and 10 12 to 10 16 Omega, The acid, alkali, a property that resistance is high with respect to H Se gas.
- insulators 10 12 to 10 16 Omega
- the acid, alkali a property that resistance is high with respect to H Se gas.
- the my assemblage shows a relatively high heat resistance temperature of 600 to 800 ° C.
- a concave portion 58 and a convex portion 60 are present on the upper end surface of the substrate 52 composed of the integrated my force. That is, the upper end surface of the integrated my-force board 52 is greatly undulated.
- the undulation is also transferred to the upper end surface of the first electrode 16.
- the light absorbing layer 18 is provided on such a first electrode 16, the open circuit voltage of the chalcopyrite solar cell 50 as a final product tends to decrease.
- a smoothing layer 54 having smaller undulations than the integrated my-force substrate 52 is interposed.
- the smooth ridge layer 54 with smaller undulations will be interposed Thus, undulations transferred to the upper end surfaces of the first electrode 16 and the light absorbing layer 18 are reduced. Therefore, it is possible to avoid a decrease in the open circuit voltage of the fulcopyrite solar cell 50.
- the smoothing layer 54 for example, SiN or SiO is selected. in this case,
- the binder layer 56 provided on the smoothing layer 54 is a layer for firmly joining both the laminated substrate 52 and the smoothing layer 54. In addition, it functions as a diffusion preventing layer for preventing further diffusion of the impurities diffused from the integrated substrate 52. In other words, the presence of the binder layer 56 prevents the impurities contained in the integrated my substrate 52 from diffusing into the light absorbing layer 18.
- Suitable materials for the binder layer 56 include TiN or TaN. Such a material may be as good as SiN or SiO as the material of the smoothing layer 54 or Mo as the material of the first electrode 16.
- the laminated body 14 can be held on the mica substrate 52 with good bonding strength via the smoothing layer 54.
- the thickness of the binder layer 56 is preferably 0.5 to 1 m. 0.5 m
- the laminated body 14 includes a first electrode 16 made of Mo, a light absorption layer 18 made of CIGS, a buffer layer 22 made of CdS, a high resistance layer 24 made of ZnO, a transparent second electrode 20 made of ⁇ , M
- the antireflection layer 26 which also has a gF force is formed by laminating the binder layer 56 side force in this order.
- first electrode 16 and the second electrode 20 are exposed, and a first lead portion 28 and a second lead portion 30 are provided at each of the exposed portions.
- the chalcopyrite-type solar cell 50 according to the present embodiment thus configured is rich in flexibility because the substrate 52 is formed by the my-assembly force as described above. For this reason, it is easy to adopt the roll-to-roll process, which is a mass-production method, because the assembled force can be wound in a roll and sent out. That is, mass production of chalcopyrite solar cell 50 can be achieved.
- the integrated my power is cheaper and lighter than soda lime glass.
- the manufacturing cost of the rucopyrite-type solar cell 50 can be reduced, and the mass of the chalcopyrite-type solar cell 50 can be reduced.
- the heat resistance of the laminated force is significantly superior to that of the glass substrate 12.
- the precursor of Cu, In, and Ga adhered on the first electrode 16 to provide the light absorbing layer 18 is subjected to selenium dying at about 600 to 700 ° C using H Se gas. Can be.
- the selenium sintering of the precursor can proceed reliably, and thus the chalcopyrite solar cell 50 as the final product has an extremely large open circuit voltage.
- the solder layer 56 is interposed between the laminated my-force substrate 52 and the laminated body 14, the bonding strength between the laminated my-force substrate 52 and the laminated body 14 is improved. Is secured. Therefore, the stacked body 14 is prevented from falling off from the integrated my-force board 52.
- a force binder layer 56 containing impurities such as Al, K, Li, Na, Mg, and F on the integrated substrate 52 allows these impurities to enter the light absorbing layer 18. Spreading is prevented. Therefore, a chalcopyrite solar cell 50 excellent in energy conversion efficiency can be obtained.
- the upper end surface of the integrated my force substrate 52 is so smooth that the energy conversion efficiency of the force chalcopyrite solar cell 50 in which the smoothing layer 54 is provided is not reduced.
- the binder layer 56 may be provided directly on the assembled my power substrate 52 without providing the smoothing layer 54.
- TiN or TaN which is the material of the binder layer 56, is also satisfactorily bonded to the assembled force, which is the material of the substrate 52. Therefore, in this case, the bonding strength between the substrate 52 and the laminate 14 can be ensured even in this case.
- the thickness of the binder layer 56 is preferably set to 0.5 to 1 ⁇ m.
- TiN or TaN has a larger bonding compared to SiN or SiO, which is the material of the smoothing layer 54.
- a binder layer 56 is further provided between the integrated my strength substrate 52 and the smoothing layer 54 to secure further bonding strength because the bonding is performed with the integrated my strength substrate 52 with strength. Just like that.
- the laminate 14 may be formed without providing the buffer layer 22, the high-resistance layer 24, and the antireflection layer 26.
- the first electrode 16 may be made of titanium Ti or tungsten W.
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Abstract
Description
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112005000948T DE112005000948B4 (de) | 2004-04-28 | 2005-04-25 | Solarzelle vom Chalcopyrit-Typ mit einem Glimmer enthaltenden isolierenden Substrat |
| US10/599,896 US7663056B2 (en) | 2004-04-28 | 2005-04-25 | Chalcopyrite type solar cell |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-133292 | 2004-04-28 | ||
| JP2004133292A JP4695850B2 (ja) | 2004-04-28 | 2004-04-28 | カルコパイライト型太陽電池 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005106968A1 true WO2005106968A1 (ja) | 2005-11-10 |
Family
ID=35241941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/007783 Ceased WO2005106968A1 (ja) | 2004-04-28 | 2005-04-25 | カルコパイライト型太陽電池 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7663056B2 (ja) |
| JP (1) | JP4695850B2 (ja) |
| DE (1) | DE112005000948B4 (ja) |
| WO (1) | WO2005106968A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007049384A1 (ja) * | 2005-10-27 | 2007-05-03 | Honda Motor Co., Ltd. | 太陽電池 |
| US7741560B2 (en) | 2005-07-22 | 2010-06-22 | Honda Motor Co., Ltd. | Chalcopyrite solar cell |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE112005000948B4 (de) | 2012-07-12 |
| JP4695850B2 (ja) | 2011-06-08 |
| US20070209700A1 (en) | 2007-09-13 |
| US7663056B2 (en) | 2010-02-16 |
| JP2005317728A (ja) | 2005-11-10 |
| DE112005000948T5 (de) | 2007-02-15 |
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