JPH084147B2 - Solar cell - Google Patents
Solar cellInfo
- Publication number
- JPH084147B2 JPH084147B2 JP62033689A JP3368987A JPH084147B2 JP H084147 B2 JPH084147 B2 JP H084147B2 JP 62033689 A JP62033689 A JP 62033689A JP 3368987 A JP3368987 A JP 3368987A JP H084147 B2 JPH084147 B2 JP H084147B2
- Authority
- JP
- Japan
- Prior art keywords
- wavelength
- photoelectric conversion
- solar cell
- light
- transparent
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/547—Monocrystalline silicon PV cells
Landscapes
- Photovoltaic Devices (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、太陽電池に係り、特に太陽光の広いスペク
トル範囲の光を効率よく電気に変換するのに好適な、波
長変換を利用した太陽電池に関する。The present invention relates to a solar cell, and more particularly to a solar cell utilizing wavelength conversion, which is suitable for efficiently converting light in a wide spectral range of sunlight into electricity. Regarding batteries.
波長変換を利用した従来の太陽電池（特開昭57−9567
5参照）は、第２図のように、波長変換体である螢光体
入りのプラスチック板８の端面に太陽電池素子９を配置
し、プラスチック板８で太陽光等の外部光を波長変換し
て太陽電池素子９に集光入射させて電力に変換する構成
となっている。A conventional solar cell utilizing wavelength conversion (Japanese Patent Application Laid-Open No. 57-9567).
As shown in FIG. 2, a solar cell element 9 is arranged on the end face of a fluorescent substance-containing plastic plate 8 which is a wavelength converter, and the plastic plate 8 converts the wavelength of external light such as sunlight. The solar cell element 9 is condensed and incident on the solar cell element 9 to be converted into electric power.
上記従来技術は、単位電気出力当りに必要な太陽電池
素子の面積を小さくできるが、螢光体入りのプラスチッ
ク板を含む太陽電池全体の変換効率は大きくなかった。
すなわち、螢光体の吸収及び発光特性を考慮すると、外
部光が太陽光の場合には螢光体入りのプラスチック板の
端面に集光できる太陽光エネルギーの割合は、入射太陽
光エネルギーの高々10〜20％である。そのため、太陽電
池素子の効率を30％としても、入射太陽光エネルギーの
３〜６％を電気に変換できるのみである。そのため、上
記従来技術では、プラスチック板単位面積当りの電力変
換効率が低く、単位電気出力当りに必要な螢光体入りの
プラスチック板を含む太陽電池全体の面積が大きくなる
という問題があった。Although the above-mentioned conventional technique can reduce the area of the solar cell element required per unit of electric output, the conversion efficiency of the entire solar cell including the plastic plate containing the fluorescent material is not large.
That is, considering the absorption and emission characteristics of the phosphor, when the external light is sunlight, the ratio of the sunlight energy that can be condensed on the end surface of the plastic plate containing the phosphor is at most 10 of the incident solar energy. ~ 20%. Therefore, even if the efficiency of the solar cell element is set to 30%, only 3 to 6% of incident solar energy can be converted into electricity. Therefore, in the above-mentioned conventional technique, there is a problem that the power conversion efficiency per unit area of the plastic plate is low and the area of the entire solar cell including the plastic plate containing the fluorescent material required per unit electric output becomes large.
本発明の目的は、単位面積当りの効率の高い太陽電池
を提供することにある。An object of the present invention is to provide a solar cell with high efficiency per unit area.
上記目的を達成するため、本発明の太陽電池は、波長
変換体を含有する透明体３、透明電極５、光電変換層６
および裏面電極７の積層体からなる太陽電池において、
前記波長変換体を含有する透明体３は、光電変換に利用
できない短波長側の光を吸収して光電変換に利用可能な
波長の光を発光するストークス型の波長変換体を含有す
る透明体3aと、光電変換に利用できない長波長側の光を
吸収して光電変換に利用可能な波長の光を発光するアン
チストークス型の波長変換体を含有する透明体3bとの積
層体で構成されていることを特徴とするものである。In order to achieve the above object, the solar cell of the present invention includes a transparent body 3 containing a wavelength conversion body, a transparent electrode 5, and a photoelectric conversion layer 6.
And a solar cell comprising a laminated body of the back electrode 7,
The transparent body 3 containing the wavelength converter is a transparent body 3a containing a Stokes type wavelength converter that absorbs light on the short wavelength side that cannot be used for photoelectric conversion and emits light of a wavelength that can be used for photoelectric conversion. And a transparent body 3b containing an anti-Stokes wavelength converter that absorbs light on the long wavelength side that cannot be used for photoelectric conversion and emits light of a wavelength that can be used for photoelectric conversion. It is characterized by that.
第３図は太陽光スペクトルと光電変換層の光電変換効
率の波長依存性とを示したものである。同図に示すよう
に光電変換効率は太陽光スペクトルの一部波長範囲に限
って高いだけである。FIG. 3 shows the solar spectrum and the wavelength dependence of the photoelectric conversion efficiency of the photoelectric conversion layer. As shown in the figure, the photoelectric conversion efficiency is high only in a partial wavelength range of the sunlight spectrum.
しかるに本発明では光電変換効率の低い波長範囲に吸
収波長を持ち光電変換効率の高い波長範囲に発光波長を
もつ波長変換体の層が光電変換層の光入射側に設けられ
ている。これにより、光電変換に寄与できなかった波長
範囲の光も光電変換に有効に寄与できるようになるの
で、入射太陽光に対して単位面積当りの効率が高くな
る。However, in the present invention, the layer of the wavelength converter having the absorption wavelength in the wavelength range of low photoelectric conversion efficiency and the emission wavelength in the wavelength range of high photoelectric conversion efficiency is provided on the light incident side of the photoelectric conversion layer. As a result, light in the wavelength range that could not contribute to photoelectric conversion can also contribute effectively to photoelectric conversion, and the efficiency per unit area with respect to incident sunlight increases.
第１図は本発明の実施例を示す太陽電池の断面図であ
る。第１図において、反射防止膜１、透明保護カバー
２、ストークス型の波長変換体を含む透明体3a、アンチ
ストークス型の波長変換体を含む透明体3b、透明接着材
４、透明電極５、光電変換層６、裏面電極７が順に層状
に積層されている。すなわち、第１図に示した本実施例
では、波長変換体の層を、短い波長の光を吸収して長い
波長の光を発光するタイプすなわちストークス型の波長
変換体（ZnS等）の層3aと、上記と逆の波長変換をする
アンチストークス型の波長変換体（YbEr,YbTm等）の層3
bとの２層構造としている。ストークス型の波長変換体
の層3aは光電変換に利用できなかった波長0.5μｍ以下
の短波長の光を光電変換に利用可能な長波長の光に変換
する。アンチストークス型の波長変換体は従来波長が長
すぎて光電変換に利用できなかった波長1.0μｍ以上の
光を光電変換に利用可能な波長1.0μｍ以下の波長に変
換する。そのため、本実施例では、太陽光の従来利用で
きなかった短波長側の光と長波長側の光の両方を光電変
換に利用できるようになり、さらに効率を向上させるこ
とができるという効果がある。FIG. 1 is a sectional view of a solar cell showing an embodiment of the present invention. In FIG. 1, an antireflection film 1, a transparent protective cover 2, a transparent body 3a containing a Stokes type wavelength conversion body, a transparent body 3b containing an anti-Stokes type wavelength conversion body, a transparent adhesive 4, a transparent electrode 5, a photoelectric converter. The conversion layer 6 and the back electrode 7 are sequentially laminated in layers. That is, in the present embodiment shown in FIG. 1, the layer of the wavelength converter is a layer 3a of a Stokes type wavelength converter (ZnS etc.) which absorbs light of a short wavelength and emits light of a long wavelength. And a layer 3 of an anti-Stokes wavelength converter (YbEr, YbTm, etc.) that performs wavelength conversion opposite to the above.
It has a two-layer structure with b. The Stokes-type wavelength converter layer 3a converts short-wavelength light having a wavelength of 0.5 μm or less that could not be used for photoelectric conversion into long-wavelength light that can be used for photoelectric conversion. The anti-Stokes wavelength converter converts light having a wavelength of 1.0 μm or more, which cannot be used for photoelectric conversion due to its long wavelength, to a wavelength of 1.0 μm or less, which can be used for photoelectric conversion. Therefore, in the present embodiment, it becomes possible to utilize both the light on the short wavelength side and the light on the long wavelength side, which cannot be conventionally used for sunlight, for photoelectric conversion, and there is an effect that the efficiency can be further improved. .
本発明の実施において短波長の光を吸収し長波長の光
を発光する波長変換体としては、ZnS:Ag（300〜400nmの
光を吸収し400〜500nmの光を発光する）や、ZnS:Cu（30
0〜450nmの光を吸収し450〜600nmの光を発光する）を好
適に用いられるものとして挙げることができる。In the practice of the present invention, as a wavelength converter that absorbs light of short wavelength and emits light of long wavelength, ZnS: Ag (absorbs light of 300 to 400 nm and emits light of 400 to 500 nm) and ZnS: Cu (30
Light that absorbs light of 0 to 450 nm and emits light of 450 to 600 nm) can be preferably used.
波長変換体の層を真空蒸着法や気相反応法によって透
明保護カバー（ガラス）の裏面等に形成する場合には、
その層の厚さは、波長変換体の吸収率に応じ実験等によ
り最適厚さを設定するが、通常数μｍ〜数十μｍが適当
である。When the layer of the wavelength conversion body is formed on the back surface of the transparent protective cover (glass) by a vacuum deposition method or a gas phase reaction method,
The thickness of the layer is set to an optimum thickness by experiments or the like in accordance with the absorptance of the wavelength conversion body, but is usually several μm to several tens μm.
光電変換層の材質，厚さとしては、単結晶シリコン太
陽電池…厚さ50μｍ〜300μm,ガリウム−ヒ素太陽電池
…厚さ50μｍ〜200μｍ、又はアモルファスシリコン太
陽電池…厚さ数μｍが適当である。As the material and thickness of the photoelectric conversion layer, a monocrystalline silicon solar cell ... thickness 50 μm to 300 μm, gallium-arsenic solar cell ... thickness 50 μm to 200 μm, or amorphous silicon solar cell ... thickness several μm is suitable.
透明電極は単結晶シリコンやガリウム−ヒ素太陽電池
では必ずしも必要でなく、グリッド電極でもよい。アモ
ルファスシリコン太陽電池では透明電極は必要である。
透明電極の材質はSnO2又はITO（インジウム錫酸化物）
を用い得る。The transparent electrode is not always necessary in single crystal silicon or gallium-arsenide solar cells, and may be a grid electrode. Amorphous silicon solar cells require transparent electrodes.
The material of the transparent electrode is SnO 2 or ITO (indium tin oxide)
Can be used.
本発明によれば、太陽光のうち従来利用していた波長
範囲の光の他に、従来利用できなかった波長範囲の光を
利用可能な波長範囲に波長変換して利用できるので、太
陽電池の効率を10％以上向上させることができる。According to the present invention, in addition to light in the wavelength range that has been conventionally used in sunlight, light in the wavelength range that could not be conventionally used can be converted into a usable wavelength range and can be used. The efficiency can be improved by 10% or more.
第１図は本発明の一実施例の太陽電池の断面図、第２図
は従来の太陽電池の外観図、第３図は太陽光スペクトル
と光電変換層の光電変換効率の波長依存性とを示す図で
ある。 １……反射防止膜、２……透明保護カバー 3a……ストークス型の波長変換体を含む透明体 3b……アンチストークス型の波長変換体を含む透明体 ４……透明接着材、５……透明電極 ６……光電変換層、７……裏面電極FIG. 1 is a sectional view of a solar cell according to an embodiment of the present invention, FIG. 2 is an external view of a conventional solar cell, and FIG. 3 is a solar spectrum and wavelength dependence of photoelectric conversion efficiency of a photoelectric conversion layer. FIG. 1 ... Antireflection film, 2 ... Transparent protective cover 3a .. Transparent body containing Stokes-type wavelength converter 3b .. Transparent body containing anti-Stokes wavelength converter. 4 ... Transparent adhesive, 5 ... Transparent electrode 6 ... Photoelectric conversion layer, 7 ... Backside electrode
Claims (1)
電極（５）、光電変換層（６）および裏面電極（７）の
積層体からなる太陽電池において、 前記波長変換体を含有する透明体（３）は、光電変換に
利用できない短波長側の光を吸収して光電変換に利用可
能な波長の光を発光するストークス型の波長変換体を含
有する透明体（3a）と、光電変換に利用できない長波長
側の光を吸収して光電変換に利用可能な波長の光を発光
するアンチストークス型の波長変換体を含有する透明体
（3b）との積層体で構成されていることを特徴とする太
陽電池。1. A solar cell comprising a laminate of a transparent body (3) containing a wavelength converter, a transparent electrode (5), a photoelectric conversion layer (6) and a back electrode (7), which contains the wavelength converter. A transparent body (3a) containing a Stokes type wavelength conversion body that absorbs light on the short wavelength side that cannot be used for photoelectric conversion and emits light of a wavelength that can be used for photoelectric conversion; It is composed of a laminate with a transparent body (3b) containing an anti-Stokes wavelength converter that absorbs light on the long wavelength side that cannot be used for photoelectric conversion and emits light of a wavelength that can be used for photoelectric conversion. A solar cell characterized by that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62033689A JPH084147B2 (en) | 1987-02-17 | 1987-02-17 | Solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62033689A JPH084147B2 (en) | 1987-02-17 | 1987-02-17 | Solar cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63200576A JPS63200576A (en) | 1988-08-18 |
| JPH084147B2 true JPH084147B2 (en) | 1996-01-17 |
Family
ID=12393393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62033689A Expired - Fee Related JPH084147B2 (en) | 1987-02-17 | 1987-02-17 | Solar cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084147B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011040391A1 (en) | 2009-09-29 | 2011-04-07 | 日立化成工業株式会社 | Fluorescent material for converting wavelengths, resin composition for converting wavelengths containing the fluorescent material, solar cell module produced using the fluorescent material or the resin composition, process for producing resin composition for converting wavelengths, and process for producing solar cell module |
| JP2011165754A (en) * | 2010-02-05 | 2011-08-25 | Denso Corp | Solar cell module |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2664371B2 (en) * | 1987-03-30 | 1997-10-15 | 三洋電機株式会社 | Photovoltaic element |
| US5782995A (en) * | 1993-11-05 | 1998-07-21 | Citizen Watch Co., Ltd. | Solar battery device and method of fabricating the same |
| WO1995017015A1 (en) * | 1993-12-14 | 1995-06-22 | Citizen Watch Co., Ltd. | Solar battery device |
| DE19954954A1 (en) * | 1999-11-16 | 2001-05-23 | Hne Elektronik Gmbh & Co Satel | Photovoltaic transducer for obtaining energy from sunlight, uses fluorescent layer to match spectral range of sunlight to sensitivity of photocells |
| JP4923232B2 (en) * | 2004-07-07 | 2012-04-25 | 国立大学法人東北大学 | Solar panel |
| JP2007027271A (en) * | 2005-07-13 | 2007-02-01 | Univ Of Electro-Communications | Solar power module |
| JP2008130801A (en) * | 2006-11-21 | 2008-06-05 | Masataka Murahara | Solar power generation system |
| JP2008311604A (en) * | 2007-02-06 | 2008-12-25 | Hitachi Chem Co Ltd | Solar cell module and wavelength conversion type condensing film for solar cell module |
| US20090084963A1 (en) * | 2007-10-01 | 2009-04-02 | David, Joseph And Negley | Apparatus and methods to produce electrical energy by enhanced down-conversion of photons |
| JP2010141297A (en) * | 2008-11-14 | 2010-06-24 | Nippon Leiz Co Ltd | Light guide, photoelectric converter, and flat surface photoelectric conversion device |
| EP2581943A1 (en) * | 2010-06-11 | 2013-04-17 | Asahi Glass Company, Limited | Translucent laminate and solar cell module using same |
| JP2012025870A (en) * | 2010-07-26 | 2012-02-09 | Akita Univ | Method for shielding ultraviolet radiation and intensifying visible light, and ultraviolet-radiation-shielding, visible-light-intensifying material capable of achieving the method |
| JP2012069865A (en) * | 2010-09-27 | 2012-04-05 | Toppan Printing Co Ltd | Solar cell sealant and solar cell module using the same |
| JP2012109414A (en) * | 2010-11-17 | 2012-06-07 | Toppan Printing Co Ltd | Solar cell module |
| JP5476290B2 (en) * | 2010-12-28 | 2014-04-23 | 株式会社日立製作所 | Solar cell module |
| JP6034569B2 (en) * | 2012-02-06 | 2016-11-30 | 日東電工株式会社 | Adhesive sheet, protection unit and solar cell module |
| JP2013161982A (en) * | 2012-02-06 | 2013-08-19 | Nitto Denko Corp | Adhesive sheet and solar cell module |
| JP5929578B2 (en) * | 2012-07-13 | 2016-06-08 | 株式会社デンソー | Solar cell module and solar cell module assembly |
| JP5989536B2 (en) * | 2012-12-21 | 2016-09-07 | 京セラ株式会社 | Solar cell and solar cell module |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5333592A (en) * | 1976-09-09 | 1978-03-29 | Seiko Epson Corp | Solar battery |
| US4202704A (en) * | 1978-12-13 | 1980-05-13 | International Business Machines Corporation | Optical energy conversion |
| JPS5678564U (en) * | 1979-11-20 | 1981-06-25 | ||
| JPS5832476A (en) * | 1981-08-20 | 1983-02-25 | Sanyo Electric Co Ltd | photovoltaic device |
-
1987
- 1987-02-17 JP JP62033689A patent/JPH084147B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011040391A1 (en) | 2009-09-29 | 2011-04-07 | 日立化成工業株式会社 | Fluorescent material for converting wavelengths, resin composition for converting wavelengths containing the fluorescent material, solar cell module produced using the fluorescent material or the resin composition, process for producing resin composition for converting wavelengths, and process for producing solar cell module |
| JP2011165754A (en) * | 2010-02-05 | 2011-08-25 | Denso Corp | Solar cell module |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63200576A (en) | 1988-08-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |