JPH0851226A - Integrated photovoltaic device - Google Patents
Integrated photovoltaic deviceInfo
- Publication number
- JPH0851226A JPH0851226A JP6185662A JP18566294A JPH0851226A JP H0851226 A JPH0851226 A JP H0851226A JP 6185662 A JP6185662 A JP 6185662A JP 18566294 A JP18566294 A JP 18566294A JP H0851226 A JPH0851226 A JP H0851226A
- Authority
- JP
- Japan
- Prior art keywords
- photovoltaic device
- integrated photovoltaic
- dividing lines
- electrode
- transparent electrode
- 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.)
- Granted
Links
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 abstract description 6
- 238000010248 power generation Methods 0.000 description 11
- 229910021417 amorphous silicon Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910006404 SnO 2 Inorganic materials 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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
- H01L31/0248—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 characterised by their semiconductor bodies
- H01L31/0352—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 characterised by their semiconductor bodies characterised by their shape or by the shapes, relative sizes or disposition of the semiconductor regions
- H01L31/035272—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 characterised by their semiconductor bodies characterised by their shape or by the shapes, relative sizes or disposition of the semiconductor regions characterised by at least one potential jump barrier or surface barrier
-
- 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
- H01L31/0445—PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells
- H01L31/046—PV modules composed of a plurality of thin film solar cells deposited on the same substrate
- H01L31/0463—PV modules composed of a plurality of thin film solar cells deposited on the same substrate characterised by special patterning methods to connect the PV cells in a module, e.g. laser cutting of the conductive or active layers
-
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光起電力装置に係り、
特に、透明電極の抵抗ロスを減少させて特性を高められ
るようにした光起電力装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photovoltaic device,
In particular, the present invention relates to a photovoltaic device in which the resistance loss of the transparent electrode is reduced to improve the characteristics.
【０００２】[0002]
【従来の技術】合金型アモルファスシリコン半導体を含
むアモルファスシリコン半導体を発電層に用いる光起電
力装置は、半導体層がガス反応で形成されること、結晶
のようにグレイダウンバウンダリングがないことなどか
ら大面積化が比較的容易である。しかし、面積が大きく
なるにつれて入射側電極、すなわち、透明電極の抵抗に
よる電力損失が主な原因となって変換効率は減少する傾
向にある。2. Description of the Related Art A photovoltaic device using an amorphous silicon semiconductor including an alloy type amorphous silicon semiconductor for a power generation layer has a problem that a semiconductor layer is formed by gas reaction and there is no gray down boundary like a crystal. It is relatively easy to increase the area. However, as the area becomes larger, the conversion efficiency tends to decrease mainly due to the power loss due to the resistance of the incident side electrode, that is, the transparent electrode.
【０００３】一方、所定の電圧をとるため、１枚の基板
上に複数の分割線で縞状に分割された多数の光起電力素
子を形成し、相隣接する光起電力間を順次直列接続（カ
スケード接続）した集積型光起電力装置が実用化されて
いる。On the other hand, in order to obtain a predetermined voltage, a large number of photovoltaic elements, which are divided into stripes by a plurality of dividing lines, are formed on a single substrate, and the photovoltaic elements adjacent to each other are sequentially connected in series. (Cascade connection) integrated photovoltaic devices have been put to practical use.
【０００４】図６及び図７は従来の集積型光起電力装置
を示し、図６は断面図、図７は平面図である。図６に示
すように、この集積型光起電力装置１０１は、酸化錫
（ＳｎＯ2 ）などからなる透明電極層をガラス基板１０
２に積層し、所定の分割線１０３ａに沿ってレーザ等で
除去して複数の縞状の透明電極１０４を形成した後、ｐ
ｉｎ接合の非晶質シリコンからなる発電層１０５を形成
し、分割線１０３ｂに沿ってレーザ等でこの発電層１０
５の一部分を除去し、更にこの後、加熱蒸着法により銀
からなる裏面電極層を形成してから、分割線３ｃに沿っ
てレーザ等で裏面電極１０６を形成するという手順で作
られる。尚、図中１０３は、加工部であり、分割線３
ａ，３ｂ，３ｃを含めて、ここでは分割線という。6 and 7 show a conventional integrated photovoltaic device, FIG. 6 is a sectional view, and FIG. 7 is a plan view. As shown in FIG. 6, the integrated photovoltaic device 101 includes a glass substrate 10 and a transparent electrode layer made of tin oxide (SnO 2 ).
2 and laminated with a predetermined dividing line 103a by a laser or the like to form a plurality of striped transparent electrodes 104, and then p
A power generation layer 105 made of in-junction amorphous silicon is formed, and the power generation layer 10 is formed along the dividing line 103b with a laser or the like.
A part of 5 is removed, and after that, a back electrode layer made of silver is formed by a heating vapor deposition method, and then the back electrode 106 is formed by a laser or the like along the dividing line 3c. Reference numeral 103 in the drawing denotes a processing portion, which is the dividing line 3
Here, a, 3b, and 3c are referred to as dividing lines.
【０００５】図７に示すように、この分割線１０３は光
起電力装置１０１の面に直角な方向から見て互いに平行
に配置される直線状に形成される。尚、１０８は、この
集積型光起電力の端縁部であって、最左端の光起電力素
子の透明電極１０４に連なる電極１０６に相当する部分
であり、このためプラス側電極となる。As shown in FIG. 7, the dividing lines 103 are formed in straight lines arranged in parallel to each other when viewed from a direction perpendicular to the surface of the photovoltaic device 101. Reference numeral 108 denotes an edge portion of this integrated photovoltaic, which is a portion corresponding to the electrode 106 connected to the transparent electrode 104 of the leftmost photovoltaic element, and is therefore a positive electrode.
【０００６】又、例えば図８に示すように、透明電極１
０４に接するように形成された、この透明電極１０４よ
りも低抵抗材料からなるくし型の集電電極１０７を設け
た集積型光起電力装置１１１がある。この集電電極１０
７に依り光起電力装置としての抵抗損失を低減すること
が可能となる。Also, as shown in FIG. 8, for example, the transparent electrode 1
There is an integrated photovoltaic device 111 provided with a comb-shaped collector electrode 107 made of a material having a resistance lower than that of the transparent electrode 104 and formed so as to contact with 04. This collector electrode 10
7 makes it possible to reduce resistance loss as a photovoltaic device.
【０００７】[0007]
【発明が解決しようとする課題】上記透明電極１０４は
導電性が低いＳｎＯ2 、ＩＴＯ、ＺｎＯなどで構成され
ているが、光起電力装置の大面積化における抵抗損失増
大の主な原因になっており、集積型構造をする際の大き
な制限となっている。The transparent electrode 104 [0005] The low conductivity SnO 2, ITO, has been configured by a ZnO, become a major cause of resistive losses increase in a large area of the photovoltaic device Therefore, it is a big limitation in forming an integrated structure.
【０００８】又、集電電極１０７を設けた場合には、透
明電極に基づく抵抗損失は低減できるが、この集電電極
１０７が発電層への入射光を遮光することとなり、光起
電力装置の受光面積を狭くするという問題がある。Further, when the current collecting electrode 107 is provided, the resistance loss due to the transparent electrode can be reduced, but the current collecting electrode 107 shields the incident light to the power generation layer, so that the photovoltaic device There is a problem of narrowing the light receiving area.
【０００９】本発明の第１の集積型光起電力装置は、上
記の事情を鑑みて、透明電極の抵抗損失を減少させて特
性を高められるようにした集積型光起電力装置を提供す
ることを目的とするものである。In view of the above circumstances, the first integrated photovoltaic device of the present invention provides an integrated photovoltaic device in which the resistance loss of the transparent electrode is reduced to improve the characteristics. The purpose is.
【００１０】又、本発明の第２の集積型光起電力装置
は、上記の目的に加えて、集電電極による受光面積の減
少を少なくさせて更に特性を高められるようにした集積
型光起電力装置を提供することを目的とするものであ
る。The second integrated photovoltaic device according to the present invention is, in addition to the above object, an integrated photovoltaic device in which the reduction of the light receiving area due to the collector electrode is reduced to further improve the characteristics. It is intended to provide a power device.
【００１１】[0011]
【課題を解決するための手段】本発明の第１の集積型光
起電力装置は、絶縁基板上に分割線で縞状に分割されて
なる複数の光起電力素子を、直列接続した集積型光起電
力装置において、上記の目的を達成するため、上記分割
線が１本置きに、又は全て波形状に形成され、隣接する
分割線の間隔が繰り返し拡縮されることを特徴とするも
のである。A first integrated photovoltaic device according to the present invention is an integrated photovoltaic device in which a plurality of photovoltaic elements, which are divided into stripes by dividing lines on an insulating substrate, are connected in series. In order to achieve the above object, the photovoltaic device is characterized in that the dividing lines are formed every other line or all in a wavy shape, and intervals between adjacent dividing lines are repeatedly expanded and contracted. .
【００１２】又、本発明の第２の集積型光起電力装置
は、上記目的を達成するために、上記の構成に加えて、
隣接する分割線の間隔が最短間隔となる部分またはその
近傍にくし歯が位置するように光入射側電極に接して集
電電極が設けられたことを特徴とする。Further, in order to achieve the above-mentioned object, the second integrated photovoltaic device of the present invention has, in addition to the above structure,
A current collecting electrode is provided in contact with the light incident side electrode so that the comb teeth are located at or near the portion where the distance between the adjacent dividing lines is the shortest.
【００１３】[0013]
【作用】１本置きの分割線、又は全ての分割線を波形状
に形成し、隣接する分割線の間隔が繰り返し拡縮される
ようにすれば、分割線の間隔が縮小された部分では透明
電極の距離が短くなり、その抵抗値が分割線の間隔が拡
大された部分よりも小さくなる。これにより、電流は抵
抗値が小さい分割線の間隔が縮小された部分により多く
流れ、収集するキャリアの量が大きくなり全体的な抵抗
損失が減少することになる。If every other dividing line is formed in a corrugated shape and the intervals between the adjacent dividing lines are repeatedly expanded and contracted, the transparent electrode is provided in the portion where the intervals between the dividing lines are reduced. Becomes shorter, and the resistance value becomes smaller than that in the portion where the interval between the dividing lines is enlarged. As a result, a larger amount of current flows in the portion where the distance between the dividing lines having a small resistance value is reduced, the amount of carriers to be collected increases, and the overall resistance loss decreases.
【００１４】又、集電電極を設ける場合には、この電流
が集中する分割線の間隔が縮小された部分に集電電極を
配置することにより、集電電極が占める面積を小さくす
ることができ、光起電力装置の有効面積の減少、即ち、
受光面積の減少を小さくできる。Further, when the current collecting electrode is provided, the area occupied by the current collecting electrode can be reduced by arranging the current collecting electrode in a portion where the interval between the dividing lines on which the current is concentrated is reduced. , The reduction of the effective area of the photovoltaic device, ie
The reduction of the light receiving area can be reduced.
【００１５】[0015]
【実施例】本発明の実施例を図面に基づいて具体的に説
明すれば、以下の通りである。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１６】図１に示すように、本発明の一実施例に係
る集積型光起電力装置１は、１枚のガラス基板２上に分
割線３で縞状に分割された多数の光起電力素子Ｃからな
り、この光起電力素子Ｃ自体は、図２に示すように、ガ
ラス基板２上透明電極４、発電層５及び裏面電極６を順
次積層形成した点では従来の集積型光起電力装置と同様
である。As shown in FIG. 1, an integrated photovoltaic device 1 according to an embodiment of the present invention comprises a large number of photovoltaics divided into stripes on a glass substrate 2 by a dividing line 3. As shown in FIG. 2, the photovoltaic element C itself is composed of an element C. The photovoltaic element C itself has a structure in which a transparent electrode 4, a power generation layer 5 and a back surface electrode 6 on a glass substrate 2 are sequentially laminated to form a conventional integrated photovoltaic element. It is similar to the device.
【００１７】この集積型光起電力装置１の製造方法とし
ては、酸化錫（ＳｎＯ2 ）からなる透明電極層をガラス
基板２に積層し、この透明電極層を所定の分割線３ａに
沿ってＱスイッチ付Ｎｄ：ＹＡＧレーザ（５Ｊ／ｃｍ2
のエネルギー密度）を照射することにより、その部分の
透明電極層を除去する。これにより、複数の縞状の透明
電極４を形成できる。次に、表１に示す条件で通常のプ
ラズマＣＶＤ法により、基板２上に分割された透明電極
４を覆うようにｐ／ｉ間にカーボン量をグレーデッドさ
せたｐ−ＳｉＣバッファ層を備えたｐｉｎ接合の非晶質
シリコンからなる発電層５を形成する。続いて、分割線
３ｂに沿ってＱスイッチ付Ｎｄ：ＹＡＧレーザ（０．２
Ｊ／ｃｍ2 のエネルギー密度）をこの発電層５に照射す
ることにより、その照射された領域を除去し、光起電力
素子ごとにこの発電層５を分割する。更にこの後、加熱
蒸着法により銀からなる裏面電極層を形成してから、分
割線３ｃに沿ってＱスイッチ付Ｎｄ：ＹＡＧレーザ（３
Ｊ／ｃｍ2 のエネルギー密度）を照射し、その照射され
た領域の裏面電極層と発電層５を除去して裏面電極６を
形成するという手順で作ったものである。尚、この実施
例では、上記分割線３ａ，３ｂ，３ｃを含めた部分を加
工部とし、分割線３として示している。As a method of manufacturing the integrated photovoltaic device 1, a transparent electrode layer made of tin oxide (SnO 2 ) is laminated on a glass substrate 2, and the transparent electrode layer is formed along a predetermined dividing line 3a with Q. Nd: YAG laser with switch (5 J / cm 2
Energy density) to remove the transparent electrode layer at that portion. Thereby, a plurality of striped transparent electrodes 4 can be formed. Next, a p-SiC buffer layer having a carbon amount graded between p / i was provided so as to cover the transparent electrode 4 divided on the substrate 2 by the usual plasma CVD method under the conditions shown in Table 1. A power generation layer 5 made of amorphous silicon having a pin junction is formed. Then, an Nd: YAG laser with a Q switch (0.2
By irradiating this power generation layer 5 with an energy density (J / cm 2 ), the irradiated region is removed, and this power generation layer 5 is divided for each photovoltaic element. Further, after this, a back electrode layer made of silver is formed by a heating vapor deposition method, and then a Nd: YAG laser (3
(J / cm 2 energy density), the back electrode layer and the power generation layer 5 in the irradiated region are removed, and the back electrode 6 is formed. In this embodiment, the part including the dividing lines 3a, 3b and 3c is used as the processing portion and is shown as the dividing line 3.
【００１８】[0018]
【表１】 [Table 1]
【００１９】さて、この発明は、図１に示すように、こ
の集積型光起電力装置１の分割線３は全て三角波形状に
屈曲して形成され、かつ、隣接する分割線３を半波長ず
つずらすことにより隣接する分割線３の間隔が互いに繰
り返し拡縮されるようにしていることが従来の集積型光
起電力装置１０１・１１１と異なる。According to the present invention, as shown in FIG. 1, all the division lines 3 of the integrated photovoltaic device 1 are formed by bending in a triangular wave shape, and the adjacent division lines 3 are divided by half wavelength. This is different from the conventional integrated photovoltaic devices 101 and 111 in that the spacing between the adjacent dividing lines 3 is repeatedly expanded and contracted by shifting.
【００２０】各分割線３の平均間隔は特に限定されない
が、従来例との比較を容易にするため、この実施例では
隣接する分割線３の平均間隔Ｗave.を図１に破線で示す
従来例の一例としての分割線１０５の間隔と同じ間隔の
９．９ｍｍとしている。又、分割線３の最大間隔Ｗmax.
と最小間隔Ｗmin.との差は１２ｍｍとし、光起電力素子
Ｃの集積数は１０段としている。The average interval between the dividing lines 3 is not particularly limited, but in order to facilitate comparison with the conventional example, in this embodiment, the average interval W ave. Between the adjacent dividing lines 3 is shown by a broken line in FIG . The interval is 9.9 mm, which is the same as the interval between the dividing lines 105 as an example. In addition, the maximum spacing W max.
And the minimum distance W min. Is 12 mm, and the number of integrated photovoltaic elements C is 10.
【００２１】この集積型光起電力装置１のＡＭ１．５、
１００ｍＷ／ｃｍ2 照射光下での出力電力を測定する
と、図３に示すように、約１１８５ｍＷであった。比較
のため、同様にして作られ、平行な直線状の分割線１０
３が９．９ｍｍ間隔で設けられ、セルＣの集積数が１０
である従来例のＡＭ１．５、１００ｍＷ／ｃｍ2 照射光
下での出力電力を測定すると約１０９２ｍＷであり、分
割線３の間隔が繰り返し拡縮されるようにしたこの実施
例は、従来例を基準にすれば約８．９％出力が高められ
ていることが分かる。AM1.5 of this integrated photovoltaic device 1,
When the output power under the irradiation light of 100 mW / cm 2 was measured, it was about 1185 mW as shown in FIG. For comparison, parallel linear dividing lines 10 made in the same manner
3 are provided at intervals of 9.9 mm, and the number of cells C integrated is 10
The output power under irradiation light of AM 1.5 and 100 mW / cm 2 of the conventional example is about 1092 mW, and this embodiment in which the interval of the dividing line 3 is repeatedly expanded and contracted is a standard example. It can be seen that the output is increased by about 8.9%.
【００２２】この実施例において、分割線３の最大間隔
Ｗmax.と最小間隔Ｗmin.との差を５ｍｍ、８ｍｍ、１８
ｍｍと異ならせた各変形例につきＡＭ１．５、１００ｍ
Ｗ／ｃｍ2 照射光下での出力電力を測定したところ、図
３に示すようにそれぞれ約１１３９ｍＷ、約１１７９ｍ
Ｗ、約１１７４ｍＷであり、前記従来例に比べて出力電
力が高められていることと、上記一実施例のように分割
線３の最大間隔Ｗmax.と最小間隔Ｗmin.との差を１２ｍ
ｍとした時が最適であることとが分かる。In this embodiment, the difference between the maximum distance W max. And the minimum distance W min. Of the dividing line 3 is 5 mm, 8 mm, 18
AM 1.5, 100m for each modified example different from mm
Output power under W / cm 2 irradiation light was measured, and as shown in FIG. 3, about 1139 mW and about 1179 mW, respectively.
W, about 1174 mW, which is higher in output power than the conventional example, and the difference between the maximum interval W max. And the minimum interval W min.
It can be seen that the optimum value is m.
【００２３】更に、比較のために、分割線３の最大間隔
Ｗmax.と最小間隔Ｗmin.との差を２ｍｍとした場合につ
いて出力電力を測定したところ従来例とほとんど変わり
がないことが分かった。Further, for comparison, the output power was measured when the difference between the maximum distance W max. And the minimum distance W min. Of the dividing line 3 was 2 mm, and it was found that there was almost no difference from the conventional example. It was
【００２４】分割線３の平均間隔Ｗave.を９．９ｍｍと
する場合には、分割線３の最大間隔Ｗmax.と最小間隔Ｗ
min.との差を１９．８ｍｍ以上にすることはできないの
で、結局、分割線３の最大間隔Ｗmax.と最小間隔Ｗmin.
との差が２ｍｍ以上、１９．８ｍｍ未満の範囲で出力電
力が増加する効果が得られることになり、図３によれば
特に４ｍｍから１８ｍｍの範囲で顕著な効果が得られ、
１２ｍｍで最も顕著な効果が得られることが分かる。When the average spacing W ave. Between the dividing lines 3 is 9.9 mm, the maximum spacing W max.
Since the difference from the min. cannot be 19.8 mm or more, the maximum distance W max. and the minimum distance W min.
The effect that the output power is increased is obtained in the range of 2 mm or more and less than 19.8 mm, and according to FIG. 3, a remarkable effect is obtained particularly in the range of 4 mm to 18 mm.
It can be seen that the most remarkable effect is obtained at 12 mm.
【００２５】この出力電力の増大の主な原因は、分割線
３の間隔が平均間隔よりも縮小された部分では透明電極
４の距離が短くなり、透明電極４の抵抗値が分割線３の
間隔が拡大された部分よりも小さくなる結果、電流が抵
抗値が小さい分割線３の間隔が縮小された部分を通って
多く流れ、全体的な抵抗損失が減少するためであると思
われる。The main cause of the increase in the output power is that the distance between the transparent electrodes 4 becomes shorter in the portion where the distance between the dividing lines 3 is smaller than the average distance, and the resistance value of the transparent electrode 4 becomes the distance between the dividing lines 3. It is considered that as a result of being smaller than the enlarged portion, a large amount of current flows through the portion of the dividing line 3 having a small resistance value where the distance between the dividing lines 3 is reduced, and the overall resistance loss is reduced.
【００２６】また、分割線３の最大間隔Ｗmax.と最小間
隔Ｗmin.との差が１２ｍｍの場合に比べて１８ｍｍの場
合の方が出力が低下しているのは加工精度が低下したた
めであると思われる。Further, the output is lower when the difference between the maximum distance W max. And the minimum distance W min. Of the dividing line 3 is 18 mm than when it is 12 mm, because the machining accuracy is lowered. It appears to be.
【００２７】本発明の又他の実施例では、例えば図４に
示すように、上記分割線３が正弦波状に形成され、隣接
する分割線３が半波長ずつずらして配置される。この分
割線３の最大間隔Ｗmax.と最小間隔Ｗmin.との差は１２
ｍｍとしてあり、この実施例についてＡＭ１．５、１０
０ｍＷ／ｃｍ2 照射光下での出力電力を測定したとこ
ろ、表２に示すように、１１７９ｍＷであった。このこ
とから、分割線３の波形は最小間隔Ｗmin.の近傍で変化
率が急である場合の方が有利であることが分かった。In another embodiment of the present invention, for example, as shown in FIG. 4, the dividing lines 3 are formed in a sinusoidal shape, and the adjacent dividing lines 3 are arranged so as to be shifted by a half wavelength. The difference between the maximum distance W max. And the minimum distance W min. Of the dividing line 3 is 12
mm, and AM 1.5, 10 for this example.
When the output power under irradiation with 0 mW / cm 2 was measured, it was 1179 mW as shown in Table 2. From this, it was found that the waveform of the dividing line 3 is more advantageous when the rate of change is steep in the vicinity of the minimum interval W min .
【００２８】[0028]
【表２】 [Table 2]
【００２９】本発明の更に他の実施例では、ＳｉＯ2 で
絶縁コートしたステンレス基板の上に銀からなる裏面電
極６が形成され、その上に表１と同じ条件で上記各実施
例とは逆にｎ型ａ−Ｓｉ層、ｉ型ａ−Ｓｉ層、ｐ型ａ−
ＳｉＣ層の順に発電層５が形成され、更にその上に公知
のスパッタ法によってＩＴＯからなる透明電極４が形成
される。図５に示すように、この実施例の分割線３の形
状は上記の一実施例と同じであり、その分割線３の間隔
が最小間隔Ｗmin.となる位置にくしの歯が位置するくし
状の集電電極７が透明電極４に接して形成される。In still another embodiment of the present invention, a back electrode 6 made of silver is formed on a stainless steel substrate which is insulation-coated with SiO 2 , and under the same conditions as in Table 1 the reverse of the above-mentioned embodiments. N-type a-Si layer, i-type a-Si layer, p-type a-
The power generation layer 5 is formed in the order of the SiC layer, and the transparent electrode 4 made of ITO is further formed thereon by a known sputtering method. As shown in FIG. 5, the shape of the dividing line 3 of this embodiment is the same as that of the above-described embodiment, and the comb teeth are located at the position where the distance between the dividing lines 3 becomes the minimum distance W min. The current collecting electrode 7 is formed in contact with the transparent electrode 4.
【００３０】なお、この集電電極７のくしの間隔、すな
わち、分割線３の波形の波長は３〜１５ｍｍとしてい
る。The distance between the combs of the collector electrodes 7, that is, the wavelength of the waveform of the dividing line 3 is 3 to 15 mm.
【００３１】この実施例のＡＭ１．５、１００ｍＷ／ｃ
ｍ2 照射光下での出力電力を測定したところ、表３に示
すように１１４５ｍＷであった。AM1.5 of this embodiment, 100 mW / c
When the output power under irradiation with m 2 was measured, it was 1145 mW as shown in Table 3.
【００３２】比較のために、同じような手順にしたがっ
て形成され、図８に示すように、９．９ｍｍ間隔で平行
な直線状に分割線１０３を配置し、透明電極１０４に接
するように、くし型の集電電極１０７を設けたセル数１
０段の他の従来例についてＡＭ１．５、１００ｍＷ／ｃ
ｍ2 照射光下での出力電力を測定したところ、表３に示
すように１０２２ｍＷであった。For comparison, as shown in FIG. 8, the dividing lines 103 are formed in parallel with each other at intervals of 9.9 mm, and are formed so as to be in contact with the transparent electrode 104. Number of cells provided with a collector electrode 107 of a mold
AM1.5, 100mW / c for another conventional example of 0 stage
When the output power under m 2 irradiation light was measured, it was 1022 mW as shown in Table 3.
【００３３】[0033]
【表３】 [Table 3]
【００３４】他の従来例に出力電力が集電電極１０７を
設けない従来例に比べて出力電力が小さくなっているの
は集電電極１０７によって光起電力装置の有効面積が狭
められたためと思われる。又、この実施例の出力電圧が
上記一実施例にくらべて小さくなっているのも同じ理由
によるものと思われる。The output power of the other conventional example is smaller than that of the conventional example in which the collector electrode 107 is not provided, which is probably because the effective area of the photovoltaic device is narrowed by the collector electrode 107. Be done. Further, it is considered that the output voltage of this embodiment is smaller than that of the above embodiment for the same reason.
【００３５】しかし、集電電極１０７を設けない従来例
に比べて上記一実施例の出力増加が約８．９％であるの
に対して、この実施例によれば上記他の従来例に比べ
て、他の従来例を基準にすれば約１２％の出力増加が見
られる。However, compared with the conventional example in which the collector electrode 107 is not provided, the output increase of the above-mentioned one example is about 8.9%, whereas this example shows the increase of the output in comparison with the other conventional examples. Then, based on the other conventional examples, an output increase of about 12% is seen.
【００３６】したがって、この出力増加は、分割線３の
間隔が縮小された部分を通ってより多くの電流が流れ、
全体的な抵抗損失が減少することと、集電電極７が分割
線３の間隔が最小間隔Ｗmin.となる位置にくしの歯が位
置するように形成されているため、上記他の従来例に比
べて集電電極７の面積が小さくなり、光起電力装置の有
効面積が狭められたこととの相乗作用の結果であると思
われる。Therefore, this increase in output causes a larger amount of current to flow through the portion of the dividing line 3 in which the interval is reduced,
Since the overall resistance loss is reduced, and the current collecting electrode 7 is formed such that the comb teeth are located at the position where the distance between the dividing lines 3 is the minimum distance W min. It is considered that this is a result of a synergistic effect that the area of the collecting electrode 7 is smaller than that of the above and the effective area of the photovoltaic device is narrowed.
【００３７】上記の各実施例では、全ての分割線３が波
形状に形成されているが、分割線３を１本置きに波形状
に形成しても分割線３の間隔が繰り返し拡縮されるので
同様の効果が得られる。In each of the above embodiments, all the dividing lines 3 are formed in a corrugated shape, but even if every other dividing line 3 is formed in a corrugated shape, the intervals between the dividing lines 3 are repeatedly expanded and contracted. Therefore, the same effect can be obtained.
【００３８】[0038]
【発明の効果】以上に説明したように、本発明は集積型
光起電力装置の分割線が波形状に形成され、隣接する分
割線の間隔が互いに繰り返し拡縮されるので、分割線の
間隔が平均間隔よりも縮小された部分の抵抗値が減少
し、その部分に電流が集中して全体的な抵抗損失が減少
し、特性を高めることができるという効果が得られる。As described above, according to the present invention, the dividing lines of the integrated photovoltaic device are formed in a corrugated shape, and the intervals between the adjacent dividing lines are repeatedly expanded and reduced. The resistance value of the portion that is smaller than the average interval is reduced, current concentrates on the portion, the overall resistance loss is reduced, and the effect that the characteristics can be improved is obtained.
【００３９】また、本発明において、特に隣接する分割
線の間隔が最短間隔となる部分またはその近傍にくし歯
が位置するように光入射側電極に接して集電電極が設け
られる場合には、集電電極のくし歯が透明電極を覆う面
積が小さくなるので、集電電極による光起電力装置の有
効面積の減少、即ち、受光面積の減少を減少させること
ができ、これにより、更に特性を高めることができる。Further, in the present invention, in particular, when the current collecting electrode is provided in contact with the light incident side electrode so that the comb teeth are located at or near the portion where the distance between the adjacent dividing lines is the shortest distance, Since the area where the comb teeth of the collecting electrode cover the transparent electrode becomes small, the reduction of the effective area of the photovoltaic device by the collecting electrode, that is, the reduction of the light receiving area can be reduced, which further improves the characteristics. Can be increased.
【図１】本発明の一実施例の平面図である。FIG. 1 is a plan view of an embodiment of the present invention.
【図２】本発明の一実施例の要部の断面模式図である。FIG. 2 is a schematic sectional view of an essential part of an embodiment of the present invention.
【図３】本発明の一実施例及びその変形例並びに従来例
の特性図である。FIG. 3 is a characteristic diagram of an embodiment of the present invention, a modification thereof, and a conventional example.
【図４】本発明の又他の実施例の平面図である。FIG. 4 is a plan view of another embodiment of the present invention.
【図５】本発明の更に他の実施例の平面図である。FIG. 5 is a plan view of still another embodiment of the present invention.
【図６】従来例の要部の断面模式図である。FIG. 6 is a schematic sectional view of a main part of a conventional example.
【図７】従来例の平面図である。FIG. 7 is a plan view of a conventional example.
【図８】他の従来例の平面図である。FIG. 8 is a plan view of another conventional example.
２ ガラス基板 ３ 分割線 ４ 透明電極 ５ 発電層 ６ 裏面電極 ７ 集電電極 2 glass substrate 3 dividing line 4 transparent electrode 5 power generation layer 6 back electrode 7 current collecting electrode
Claims (2)
光起電力素子を、直列接続した集積型光起電力装置にお
いて、 上記分割線が１本置きに、又は全て波形状に形成され、
隣接する分割線の間隔が互いに繰り返し拡縮されること
を特徴とする集積型光起電力装置。1. An integrated photovoltaic device in which photovoltaic elements divided into stripes on an insulating substrate by stripes are connected in series to each other, and the split lines are formed every other wave or all in a wavy shape. Is
An integrated photovoltaic device, wherein the spacing between adjacent dividing lines is repeatedly expanded and reduced.
部分またはその近傍にくし歯が位置するように光入射側
電極に接して集電電極が設けられたことを特徴とする請
求項１に記載の集積型光起電力装置。2. The current collecting electrode is provided in contact with the light incident side electrode so that the comb teeth are located at or near a portion where the distance between adjacent dividing lines is the shortest. The integrated photovoltaic device according to.
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|---|---|---|---|
| JP18566294A JP3172369B2 (en) | 1994-08-08 | 1994-08-08 | Integrated photovoltaic device |
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