WO2012073802A1 - Solar battery cell and solar battery module - Google Patents

Solar battery cell and solar battery module Download PDF

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Publication number
WO2012073802A1
WO2012073802A1 PCT/JP2011/077133 JP2011077133W WO2012073802A1 WO 2012073802 A1 WO2012073802 A1 WO 2012073802A1 JP 2011077133 W JP2011077133 W JP 2011077133W WO 2012073802 A1 WO2012073802 A1 WO 2012073802A1
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Prior art keywords
transparent conductive
conductive film
photoelectric conversion
finger electrode
solar battery
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PCT/JP2011/077133
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French (fr)
Japanese (ja)
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馬場　俊明
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三洋電機株式会社
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Publication of WO2012073802A1 publication Critical patent/WO2012073802A1/en

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    • 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
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H01L31/022433—Particular geometry of the grid contacts
    • 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

Definitions

  • the present invention relates to a solar battery cell and a solar battery module.
  • the solar battery cell has a photoelectric conversion unit that generates carriers such as electrons and holes by receiving light, and an electrode that collects the carriers generated in the photoelectric conversion unit.
  • an electrode for collecting the carriers for example, as described in Patent Document 1 below, the electrode extends along one direction on the main surface of the photoelectric conversion unit and is perpendicular to the one direction.
  • An electrode including a plurality of linear finger electrode portions arranged along other directions and a bus bar portion electrically connecting the plurality of finger electrodes is widely used.
  • This invention is made
  • the objective is to provide the photovoltaic cell and photovoltaic module which have the improved photoelectric conversion efficiency.
  • the solar battery cell according to the present invention includes a rectangular photoelectric conversion unit, a planar transparent conductive film, and an electrode.
  • the transparent conductive film is provided so as to cover a portion excluding an edge portion of one main surface of the photoelectric conversion portion.
  • the electrode is disposed on the transparent conductive film.
  • the electrode includes a plurality of finger electrode portions. Each of the plurality of finger electrode portions extends along the first direction. The plurality of finger electrode portions are arranged along a second direction perpendicular to the first direction. The finger electrode portion is provided so as to reach the end side of the transparent conductive film.
  • the solar cell module according to the present invention is a solar cell module including a plurality of solar cells and a wiring material that electrically connects the plurality of solar cells.
  • the solar battery cell has a rectangular photoelectric conversion part, a planar transparent conductive film, and an electrode.
  • the transparent conductive film is provided so as to cover a portion excluding an edge portion of one main surface of the photoelectric conversion portion.
  • the electrode is disposed on the transparent conductive film.
  • the electrode includes a plurality of finger electrode portions. Each of the plurality of finger electrode portions extends along the first direction.
  • the plurality of finger electrode portions are arranged along a second direction perpendicular to the first direction.
  • the plurality of finger electrode portions are electrically connected to the wiring material.
  • the finger electrode portion is provided so as to reach the end side of the transparent conductive film.
  • a solar battery cell and a solar battery module having improved photoelectric conversion efficiency can be provided.
  • FIG. 1 is a schematic cross-sectional view of the solar cell module according to the first embodiment.
  • FIG. 2 is a schematic plan view of the light receiving surface of the solar battery cell in the first embodiment.
  • FIG. 3 is a schematic plan view of the back surface of the solar battery cell in the first embodiment.
  • FIG. 4 is a schematic cross-sectional view of the portion indicated by line IV-IV in FIG.
  • FIG. 5 is a schematic enlarged plan view in which a part of the light receiving surface of the solar battery cell in the first comparative example is enlarged.
  • FIG. 6 is a schematic enlarged plan view in which a part of the light receiving surface of the solar battery cell in the first embodiment is enlarged.
  • FIG. 7 is a schematic plan view of the light receiving surface of the solar battery cell in the second embodiment.
  • FIG. 8 is a schematic plan view of the light receiving surface of the solar battery cell in the first modification.
  • FIG. 9 is a schematic plan view of the light receiving surface of the solar battery cell in the second modification.
  • FIG. 1 is a schematic cross-sectional view of the solar cell module according to the first embodiment.
  • the solar cell module 1 includes a plurality of solar cells 10 arranged along the y direction.
  • the plurality of solar cells 10 are electrically connected by the wiring material 11.
  • a plurality of solar battery cells 10 are electrically connected in series or in parallel by electrically connecting adjacent solar battery cells 10 with the wiring material 11.
  • the wiring member 11 and the solar battery cell 10 are bonded with an adhesive.
  • an adhesive solder or a resin adhesive can be used.
  • the resin adhesive may have an insulating property or an anisotropic conductivity.
  • First and second protective members 14 and 15 are disposed on the light receiving surface side and the back surface side of the plurality of solar cells 10.
  • a sealing material 13 is provided between the solar battery cell 10 and the first protective member 14 and between the solar battery cell 10 and the second protective member 15. The plurality of solar cells 10 are sealed with this sealing material 13.
  • the sealing material 13 can be formed of a light-transmitting resin such as ethylene / vinyl acetate copolymer (EVA) or polyvinyl butyral (PVB).
  • EVA ethylene / vinyl acetate copolymer
  • PVB polyvinyl butyral
  • the first and second protective members 14 and 15 can be formed of, for example, glass or resin.
  • the first protective member 14 is disposed on the light receiving surface side of the solar battery cell 10.
  • the first protective member 14 is made of glass or translucent resin.
  • the second protection member 15 is disposed on the back side of the solar battery cell 10.
  • the 2nd protection member 15 is comprised by the resin film which interposed metal foil, such as aluminum foil.
  • the sealing material 13 On the outer periphery of the laminate having the first protective member 14, the sealing material 13, the plurality of solar cells 10, the sealing material 13, and the second protective member 15, if necessary, a metal such as Al is used.
  • a frame (not shown) is attached.
  • the terminal box for taking out the output of the photovoltaic cell 10 outside is provided in the surface of the 1st protection member 14 as needed.
  • FIG. 2 is a schematic plan view of the light receiving surface of the solar battery cell in the first embodiment.
  • FIG. 3 is a schematic plan view of the back surface of the solar battery cell in the first embodiment.
  • FIG. 4 is a schematic cross-sectional view of the portion indicated by line IV-IV in FIG. Next, the configuration of the solar battery cell 10 will be described with reference to FIGS.
  • the solar battery cell 10 has a photoelectric conversion unit 20.
  • the photoelectric conversion unit 20 is a member that generates carriers such as electrons and holes by receiving light.
  • the photoelectric conversion unit 20 may include a crystalline semiconductor substrate having one conductivity type, and may have a semiconductor junction such as a pn junction or a pin junction.
  • the photoelectric conversion unit 20 is disposed on one main surface of the crystalline semiconductor substrate having one conductivity type, and the first amorphous semiconductor layer having another conductivity type. And a second amorphous semiconductor layer having one conductivity type, which is disposed on the other main surface of the crystalline semiconductor substrate.
  • the photoelectric conversion unit 20 may have a semiconductor substrate in which an n-type dopant diffusion region and a p-type dopant diffusion region are exposed on the surface.
  • the photoelectric conversion unit 20 has a rectangular shape.
  • the “rectangular shape” includes a rectangular shape whose corners are chamfered or rounded.
  • the photoelectric conversion unit 20 has a light receiving surface 20a and a back surface 20b.
  • a planar transparent conductive film (TCO: Transparent Conductive Oxide) 25a is provided on the light receiving surface 20a. The portion of the light receiving surface 20a excluding the edge is covered with the transparent conductive film 25a.
  • a planar transparent conductive film 25b is provided on the back surface 20b. The portion excluding the edge portion of the back surface 20b is covered with the transparent conductive film 25b.
  • These transparent conductive films 25a and 25b have a function of assisting current collection by the following electrodes 21a and 21b. By providing the transparent conductive films 25a and 25b, the generated carriers are efficiently collected by the electrodes 21a and 21b before being recombined. Therefore, more improved photoelectric conversion efficiency can be realized.
  • the transparent conductive films 25a and 25b can be formed of, for example, ITO (Indium Tin Oxide).
  • the thickness of the transparent conductive films 25a and 25b can be set to, for example, about 50 nm to 150 nm.
  • the electrode 21a is disposed on the transparent conductive film 25a on the light receiving surface 20a side.
  • the electrode 21b is disposed on the transparent conductive film 25b on the back surface 20b side.
  • the material of the electrodes 21a and 21b is not particularly limited as long as it is a conductive material.
  • Each of the electrodes 21a and 21b can be made of, for example, a metal such as silver, copper, aluminum, titanium, nickel, or chromium, or an alloy containing one or more of these metals.
  • the electrodes 21a and 21b may be configured by, for example, a stacked body of a plurality of conductive layers made of the above metals or alloys.
  • the formation method of the electrodes 21a and 21b is not particularly limited.
  • the electrodes 21a and 21b can be formed using a conductive paste such as an Ag paste, for example.
  • the electrodes 21a and 21b can be formed using, for example, a sputtering method, a vapor deposition method, a screen printing method, a plating method, or the like.
  • the electrode 21b has substantially the same configuration as the electrode 21a. Therefore, here, the configuration of the electrode 21a will be described in detail. For the electrode 21b, the description relating to the electrode 21a is cited.
  • the electrode 21 a includes a plurality of finger electrode portions 31 and at least one bus bar portion 33.
  • two bus bar portions 33 are provided.
  • only one bus bar portion 33 may be provided, or three or more bus bar portions 33 may be provided.
  • four bus bar portions 33 may be provided.
  • Each of the plurality of finger electrode portions 31 extends along the x direction perpendicular to the y direction.
  • the plurality of finger electrode portions 31 are arranged along the y direction.
  • the plurality of finger electrode portions 31 are parallel to each other.
  • Each of the plurality of finger electrode portions 31 is provided so as to reach the end side of the transparent conductive film 25a. That is, one end portion in the x direction of each of the plurality of finger electrode portions 31 reaches an end side located on one side in the x direction of the transparent conductive film 25a. The other end portion in the x direction of each of the plurality of finger electrode portions 31 reaches an end side located on the other side in the x direction of the transparent conductive film 25a. Specifically, in the present embodiment, each of the plurality of finger electrode portions 31 extends beyond the edge of the transparent conductive film 25a and directly above the light receiving surface 20a.
  • one side end portion in the x direction of each of the plurality of finger electrode portions 31 extends to one side in the x direction from an end side located on one side in the x direction of the transparent conductive film 25a.
  • the other end portion in the x direction of each of the plurality of finger electrode portions 31 reaches the other side in the x direction from the end side located on the other side in the x direction of the transparent conductive film 25a.
  • the width of the finger electrode part 31 is not particularly limited, but can be, for example, about 50 ⁇ m to 200 ⁇ m.
  • the pitch along the y direction of the finger electrode portion 31 is not particularly limited, but may be, for example, about 1 mm to 3 mm.
  • the bus bar portion 33 extends along the y direction.
  • the plurality of bus bar portions 33 are arranged along the x direction.
  • Each of the plurality of bus bar portions 33 is electrically connected to the plurality of finger electrode portions 31.
  • the width of the bus bar portion 33 is preferably larger than the width of the finger electrode portion 31, and can be, for example, about 0.5 mm to 2 mm.
  • the wiring member 11 is arranged in parallel with the bus bar portion 33.
  • the wiring member 11 is provided on the bus bar portion 33.
  • bus bar portion 33 is not necessarily required to be linear.
  • the bus bar portion may be in a zigzag shape, for example.
  • the distance that must be traveled before is collected by the finger electrode portion 31 is shortened. For this reason, the current collection resistance in the edge part 25a1 can be made low. As a result, the photoelectric conversion efficiency can be improved.
  • each of the plurality of finger electrode portions 31 extends beyond the edge of the transparent conductive film 25a and directly above the light receiving surface 20a. For this reason, for example, even when the formation position of the finger electrode portion 31 in the x direction is shifted, the end portion of the finger electrode portion 31 can surely reach the end side of the transparent conductive film 25a. Therefore, the solar battery cell 10 having improved photoelectric conversion efficiency can be stably manufactured.
  • both the electrode 21a on the light receiving surface 20a side and the electrode 21b on the back surface 20b side have a plurality of finger electrode portions 31, and the finger electrode portions 31 are edges of the transparent conductive film 25a.
  • the present invention is not limited to this configuration.
  • one of the electrode on the light receiving surface side and the electrode on the back surface side may be an electrode having a different form.
  • the electrode on the back surface side may be a planar electrode made of metal or alloy.
  • FIG. 1 is referred to in common with the first embodiment.
  • FIG. 7 is a schematic plan view of the light receiving surface of the solar battery cell in the second embodiment.
  • the solar cell module of the present embodiment is different from the solar cell module 1 according to the first embodiment only in that the electrodes 21a and 21b of the solar cell 10 do not have a bus bar portion. For this reason, description other than the bus-bar part 33 of the said 1st Embodiment shall be used for this embodiment.
  • the end portion of the finger electrode portion 31 reaches the end side of the transparent conductive film 25a.
  • the solar cell module which concerns on this embodiment also has the photoelectric conversion efficiency selected as well as the solar cell module 1 which concerns on the said 1st Embodiment.
  • the solar cell module according to the present embodiment can also be stably manufactured with improved photoelectric conversion efficiency.
  • FIG. 8 is a schematic plan view of the light receiving surface of the solar battery cell in the first modification.
  • FIG. 9 is a schematic plan view of the light receiving surface of the solar battery cell in the second modification.
  • each of the plurality of finger electrode portions 31 extends beyond the edge of the transparent conductive film 25a and directly above the light receiving surface 20a has been described.
  • the present invention is not limited to this configuration as long as the finger electrode portion reaches the end of the transparent conductive film.
  • the end portions of the plurality of finger electrode portions 31 may coincide with the end sides of the transparent conductive film 25 a.
  • the present invention is not particularly limited as long as some of the plurality of finger electrodes reach the edge of the transparent conductive film.
  • finger electrodes reaching the end sides of the transparent conductive film and finger electrodes not reaching the end sides of the transparent conductive film may be alternately arranged.

Abstract

A solar battery cell with improved photoelectric conversion efficiency and a solar battery module are provided. The solar battery cell (10) comprises a rectangular photoelectric conversion unit (20), a planar transparent conductive film (25a), and an electrode (21a). The transparent conductive film (25a) is disposed so as to cover a section of one main surface (20a) of the photoelectric conversion unit (20) excluding the end edge section thereof. The electrode (21a) is positioned on top of the transparent conductive film (25a). The electrode (21a) includes a plurality of finger electrode sections (31). Each of the plurality of finger electrode sections (31) extends along a first direction (x). The plurality of finger electrode sections (31) are arranged along a second direction (y) that is perpendicular to the first direction (x). The finger electrode sections (31) are disposed so as to reach the end side of the transparent conductive film (25a).

Description

太陽電池セル及び太陽電池モジュールSolar cell and solar cell module
　本発明は太陽電池セル及び太陽電池モジュールに関する。 The present invention relates to a solar battery cell and a solar battery module.
　近年、環境負荷が低いエネルギー源として、太陽電池セルが大いに注目されている。太陽電池セルは、受光することにより電子や正孔などのキャリアを生成させる光電変換部と、光電変換部において生成したキャリアを収集する電極とを有している。このキャリアを収集するための電極としては、例えば、下記の特許文献１などに記載されているように、光電変換部の主面上において、一の方向に沿って延び、一の方向に垂直な他の方向に沿って配列された直線状の複数のフィンガー電極部と、それら複数のフィンガー電極を電気的に接続しているバスバー部とを含む電極が広く用いられている。 In recent years, solar cells have attracted a great deal of attention as an energy source with a low environmental load. The solar battery cell has a photoelectric conversion unit that generates carriers such as electrons and holes by receiving light, and an electrode that collects the carriers generated in the photoelectric conversion unit. As an electrode for collecting the carriers, for example, as described in Patent Document 1 below, the electrode extends along one direction on the main surface of the photoelectric conversion unit and is perpendicular to the one direction. An electrode including a plurality of linear finger electrode portions arranged along other directions and a bus bar portion electrically connecting the plurality of finger electrodes is widely used.
特開２０１０－１８６８６２号公報JP 2010-186862 A
　近年、太陽電池セルの光電変換効率をさらに高めたいという要望が高まってきている。 In recent years, there has been an increasing demand to further increase the photoelectric conversion efficiency of solar cells.
　本発明は、かかる点に鑑みてなされたものであり、その目的は、向上された光電変換効率を有する太陽電池セル及び太陽電池モジュールを提供することにある。 This invention is made | formed in view of this point, The objective is to provide the photovoltaic cell and photovoltaic module which have the improved photoelectric conversion efficiency.
　本発明に係る太陽電池セルは、矩形状の光電変換部と、面状の透明導電膜と、電極とを備えている。透明導電膜は、光電変換部の一主面の端縁部を除いた部分を覆うように設けられている。電極は、透明導電膜の上に配されている。電極は、複数のフィンガー電極部を含む。複数のフィンガー電極部のそれぞれは、第１の方向に沿って延びている。複数のフィンガー電極部は、第１の方向に対して垂直な第２の方向に沿って配列されている。フィンガー電極部は、透明導電膜の端辺に至るように設けられている。 The solar battery cell according to the present invention includes a rectangular photoelectric conversion unit, a planar transparent conductive film, and an electrode. The transparent conductive film is provided so as to cover a portion excluding an edge portion of one main surface of the photoelectric conversion portion. The electrode is disposed on the transparent conductive film. The electrode includes a plurality of finger electrode portions. Each of the plurality of finger electrode portions extends along the first direction. The plurality of finger electrode portions are arranged along a second direction perpendicular to the first direction. The finger electrode portion is provided so as to reach the end side of the transparent conductive film.
　本発明に係る太陽電池モジュールは、複数の太陽電池セルと、複数の太陽電池セルを電気的に接続している配線材とを備える太陽電池モジュールである。太陽電池セルは、矩形状の光電変換部と、面状の透明導電膜と、電極とを有する。透明導電膜は、光電変換部の一主面の端縁部を除いた部分を覆うように設けられている。電極は、透明導電膜の上に配されている。電極は、複数のフィンガー電極部を含む。複数のフィンガー電極部のそれぞれは、第１の方向に沿って延びている。複数のフィンガー電極部は、第１の方向に対して垂直な第２の方向に沿って配列されている。複数のフィンガー電極部は、配線材に電気的に接続されている。フィンガー電極部は、透明導電膜の端辺に至るように設けられている。 The solar cell module according to the present invention is a solar cell module including a plurality of solar cells and a wiring material that electrically connects the plurality of solar cells. The solar battery cell has a rectangular photoelectric conversion part, a planar transparent conductive film, and an electrode. The transparent conductive film is provided so as to cover a portion excluding an edge portion of one main surface of the photoelectric conversion portion. The electrode is disposed on the transparent conductive film. The electrode includes a plurality of finger electrode portions. Each of the plurality of finger electrode portions extends along the first direction. The plurality of finger electrode portions are arranged along a second direction perpendicular to the first direction. The plurality of finger electrode portions are electrically connected to the wiring material. The finger electrode portion is provided so as to reach the end side of the transparent conductive film.
　本発明によれば、向上された光電変換効率を有する太陽電池セル及び太陽電池モジュールを提供することができる。 According to the present invention, a solar battery cell and a solar battery module having improved photoelectric conversion efficiency can be provided.
図１は、第１の実施形態における太陽電池モジュールの略図的断面図である。FIG. 1 is a schematic cross-sectional view of the solar cell module according to the first embodiment. 図２は、第１の実施形態における太陽電池セルの受光面の略図的平面図である。FIG. 2 is a schematic plan view of the light receiving surface of the solar battery cell in the first embodiment. 図３は、第１の実施形態における太陽電池セルの裏面の略図的平面図である。FIG. 3 is a schematic plan view of the back surface of the solar battery cell in the first embodiment. 図４は、図２の線ＩＶ－ＩＶに示す部分の略図的断面図である。FIG. 4 is a schematic cross-sectional view of the portion indicated by line IV-IV in FIG. 図５は、第１の比較例における太陽電池セルの受光面の一部分を拡大した模式的拡大平面図である。FIG. 5 is a schematic enlarged plan view in which a part of the light receiving surface of the solar battery cell in the first comparative example is enlarged. 図６は、第１の実施形態における太陽電池セルの受光面の一部分を拡大した模式的拡大平面図である。FIG. 6 is a schematic enlarged plan view in which a part of the light receiving surface of the solar battery cell in the first embodiment is enlarged. 図７は、第２の実施形態における太陽電池セルの受光面の略図的平面図である。FIG. 7 is a schematic plan view of the light receiving surface of the solar battery cell in the second embodiment. 図８は、第１の変形例における太陽電池セルの受光面の略図的平面図である。FIG. 8 is a schematic plan view of the light receiving surface of the solar battery cell in the first modification. 図９は、第２の変形例における太陽電池セルの受光面の略図的平面図である。FIG. 9 is a schematic plan view of the light receiving surface of the solar battery cell in the second modification.
　以下、本発明を実施した好ましい形態の一例について説明する。但し、以下の実施形態は、単なる例示である。本発明は、以下の実施形態に何ら限定されない。 Hereinafter, an example of a preferable embodiment in which the present invention is implemented will be described. However, the following embodiments are merely examples. The present invention is not limited to the following embodiments.
　また、実施形態等において参照する各図面において、実質的に同一の機能を有する部材は同一の符号で参照することとする。また、実施形態等において参照する図面は、模式的に記載されたものであり、図面に描画された物体の寸法の比率などは、現実の物体の寸法の比率などとは異なる場合がある。図面相互間においても、物体の寸法比率等が異なる場合がある。具体的な物体の寸法比率等は、以下の説明を参酌して判断されるべきである。 In each drawing referred to in the embodiment and the like, members having substantially the same function are referred to by the same reference numerals. The drawings referred to in the embodiments and the like are schematically described, and the ratio of the dimensions of the objects drawn in the drawings may be different from the ratio of the dimensions of the actual objects. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.
　（第１の実施形態）
　図１は、第１の実施形態における太陽電池モジュールの略図的断面図である。太陽電池モジュール１は、ｙ方向に沿って配列された複数の太陽電池セル１０を備えている。複数の太陽電池セル１０は、配線材１１によって電気的に接続されている。具体的には、隣接する太陽電池セル１０間が配線材１１によって電気的に接続されることによって、複数の太陽電池セル１０が直列または並列に電気的に接続されている。 (First embodiment)
FIG. 1 is a schematic cross-sectional view of the solar cell module according to the first embodiment. The solar cell module 1 includes a plurality of solar cells 10 arranged along the y direction. The plurality of solar cells 10 are electrically connected by the wiring material 11. Specifically, a plurality of solar battery cells 10 are electrically connected in series or in parallel by electrically connecting adjacent solar battery cells 10 with the wiring material 11.
　配線材１１と太陽電池セル１０とは、接着剤によって接着されている。接着剤としては、半田または樹脂接着剤を用いることができる。接着剤として樹脂接着剤を用いる場合には、樹脂接着剤は絶縁性を有するものであってもよいし、異方導電性を有するものであってもよい。 The wiring member 11 and the solar battery cell 10 are bonded with an adhesive. As the adhesive, solder or a resin adhesive can be used. When a resin adhesive is used as the adhesive, the resin adhesive may have an insulating property or an anisotropic conductivity.
　複数の太陽電池セル１０の受光面側及び裏面側には、第１及び第２の保護部材１４，１５が配置されている。太陽電池セル１０と第１の保護部材１４との間及び太陽電池セル１０と第２の保護部材１５との間には、封止材１３が設けられている。複数の太陽電池セル１０は、この封止材１３により封止されている。 First and second protective members 14 and 15 are disposed on the light receiving surface side and the back surface side of the plurality of solar cells 10. A sealing material 13 is provided between the solar battery cell 10 and the first protective member 14 and between the solar battery cell 10 and the second protective member 15. The plurality of solar cells 10 are sealed with this sealing material 13.
　なお、封止材１３並びに第１及び第２の保護部材１４，１５の材料は、特に限定されない。封止材１３は、例えば、エチレン・酢酸ビニル共重合体（ＥＶＡ）やポリビニルブチラール（ＰＶＢ）等の透光性を有する樹脂により形成することができる。 In addition, the material of the sealing material 13 and the 1st and 2nd protection members 14 and 15 is not specifically limited. The sealing material 13 can be formed of a light-transmitting resin such as ethylene / vinyl acetate copolymer (EVA) or polyvinyl butyral (PVB).
　第１及び第２の保護部材１４，１５は、例えば、ガラス、樹脂などにより形成することができる。また、例えば、第１及び第２の保護部材１４，１５のうちの一方を、アルミニウム箔などの金属箔を介在させた樹脂フィルムにより構成してもよい。本実施形態では、第１の保護部材１４は、太陽電池セル１０の受光面側に配置されている。第１の保護部材１４は、ガラスまたは透光性樹脂からなる。第２の保護部材１５は、太陽電池セル１０の裏面側に配置されている。第２の保護部材１５は、アルミニウム箔などの金属箔を介在させた樹脂フィルムにより構成されている。 The first and second protective members 14 and 15 can be formed of, for example, glass or resin. For example, you may comprise one of the 1st and 2nd protection members 14 and 15 by the resin film which interposed metal foil, such as aluminum foil. In the present embodiment, the first protective member 14 is disposed on the light receiving surface side of the solar battery cell 10. The first protective member 14 is made of glass or translucent resin. The second protection member 15 is disposed on the back side of the solar battery cell 10. The 2nd protection member 15 is comprised by the resin film which interposed metal foil, such as aluminum foil.
第１の保護部材１４、封止材１３、複数の太陽電池セル１０、封止材１３、第２の保護部材１５を有する積層体の外周には、必要に応じて、Ａｌ等の金属製の枠体（図示しない）が取り付けられる。また、第１の保護部材１４の表面には、必要に応じて、太陽電池セル１０の出力を外部に取り出すための端子ボックスが設けられる。 On the outer periphery of the laminate having the first protective member 14, the sealing material 13, the plurality of solar cells 10, the sealing material 13, and the second protective member 15, if necessary, a metal such as Al is used. A frame (not shown) is attached. Moreover, the terminal box for taking out the output of the photovoltaic cell 10 outside is provided in the surface of the 1st protection member 14 as needed.
　図２は、第１の実施形態における太陽電池セルの受光面の略図的平面図である。図３は、第１の実施形態における太陽電池セルの裏面の略図的平面図である。図４は、図２の線ＩＶ－ＩＶに示す部分の略図的断面図である。次に、図２～図４を参照しながら、太陽電池セル１０の構成について説明する。 FIG. 2 is a schematic plan view of the light receiving surface of the solar battery cell in the first embodiment. FIG. 3 is a schematic plan view of the back surface of the solar battery cell in the first embodiment. FIG. 4 is a schematic cross-sectional view of the portion indicated by line IV-IV in FIG. Next, the configuration of the solar battery cell 10 will be described with reference to FIGS.
　太陽電池セル１０は、光電変換部２０を有する。光電変換部２０は、受光することによって電子や正孔などのキャリアを生成させる部材である。光電変換部２０は、例えば、一の導電型を有する結晶性半導体基板を有し、ｐｎ接合、ｐｉｎ接合等の半導体接合を有するものであってもよい。また、光電変換部２０は、一の導電型を有する結晶性半導体基板と、その結晶性半導体基板の一主面上に配されており、他の導電型を有する第１の非晶質半導体層と、結晶性半導体基板の他の主面上に配されており、一の導電型を有する第２の非晶質半導体層とを有するものであってもよい。また、光電変換部２０は、ｎ型ドーパント拡散領域とｐ型ドーパント拡散領域とが表面に露出している半導体基板を有するものであってもよい。 The solar battery cell 10 has a photoelectric conversion unit 20. The photoelectric conversion unit 20 is a member that generates carriers such as electrons and holes by receiving light. For example, the photoelectric conversion unit 20 may include a crystalline semiconductor substrate having one conductivity type, and may have a semiconductor junction such as a pn junction or a pin junction. In addition, the photoelectric conversion unit 20 is disposed on one main surface of the crystalline semiconductor substrate having one conductivity type, and the first amorphous semiconductor layer having another conductivity type. And a second amorphous semiconductor layer having one conductivity type, which is disposed on the other main surface of the crystalline semiconductor substrate. Further, the photoelectric conversion unit 20 may have a semiconductor substrate in which an n-type dopant diffusion region and a p-type dopant diffusion region are exposed on the surface.
　光電変換部２０は、矩形状である。なお、本発明において、「矩形状」には、角部が面取り状またはＲ面取り状である矩形状も含まれるものとする。 The photoelectric conversion unit 20 has a rectangular shape. In the present invention, the “rectangular shape” includes a rectangular shape whose corners are chamfered or rounded.
　光電変換部２０は、受光面２０ａと、裏面２０ｂとを有する。受光面２０ａの上には、面状の透明導電膜（ＴＣＯ：Ｔｒａｎｓｐａｒｅｎｔ　Ｃｏｎｄｕｃｔｉｖｅ　Ｏｘｉｄｅ）２５ａが設けられている。受光面２０ａの端縁部を除いた部分は、この透明導電膜２５ａにより覆われている。同様に、裏面２０ｂの上には、面状の透明導電膜２５ｂが設けられている。裏面２０ｂの端縁部を除いた部分は、この透明導電膜２５ｂにより覆われている。これら透明導電膜２５ａ、２５ｂは、下記の電極２１ａ、２１ｂによる集電を補助する機能を有している。透明導電膜２５ａ、２５ｂを設けることにより、生成したキャリアが再結合する前に効率的に電極２１ａ、２１ｂに収集される。従って、より改善された光電変換効率を実現することができる。 The photoelectric conversion unit 20 has a light receiving surface 20a and a back surface 20b. A planar transparent conductive film (TCO: Transparent Conductive Oxide) 25a is provided on the light receiving surface 20a. The portion of the light receiving surface 20a excluding the edge is covered with the transparent conductive film 25a. Similarly, a planar transparent conductive film 25b is provided on the back surface 20b. The portion excluding the edge portion of the back surface 20b is covered with the transparent conductive film 25b. These transparent conductive films 25a and 25b have a function of assisting current collection by the following electrodes 21a and 21b. By providing the transparent conductive films 25a and 25b, the generated carriers are efficiently collected by the electrodes 21a and 21b before being recombined. Therefore, more improved photoelectric conversion efficiency can be realized.
　なお、透明導電膜２５ａ、２５ｂは、例えば、ＩＴＯ（Ｉｎｄｉｕｍ　Ｔｉｎ　Ｏｘｉｄｅ）などにより形成することができる。透明導電膜２５ａ、２５ｂの厚みは、例えば、５０ｎｍ～１５０ｎｍ程度とすることができる。 The transparent conductive films 25a and 25b can be formed of, for example, ITO (Indium Tin Oxide). The thickness of the transparent conductive films 25a and 25b can be set to, for example, about 50 nm to 150 nm.
　受光面２０ａ側の透明導電膜２５ａの上には、電極２１ａが配されている。一方、裏面２０ｂ側の透明導電膜２５ｂの上には、電極２１ｂが配されている。 The electrode 21a is disposed on the transparent conductive film 25a on the light receiving surface 20a side. On the other hand, the electrode 21b is disposed on the transparent conductive film 25b on the back surface 20b side.
　電極２１ａ、２１ｂの材質は、導電材料である限りにおいて特に限定されない。電極２１ａ、２１ｂのそれぞれは、例えば、銀、銅、アルミニウム、チタン、ニッケル、クロムなどの金属や、それらの金属のうちの一種以上を含む合金により構成することができる。また、電極２１ａ、２１ｂは、例えば、上記金属や合金からなる複数の導電層の積層体により構成されていてもよい。 The material of the electrodes 21a and 21b is not particularly limited as long as it is a conductive material. Each of the electrodes 21a and 21b can be made of, for example, a metal such as silver, copper, aluminum, titanium, nickel, or chromium, or an alloy containing one or more of these metals. In addition, the electrodes 21a and 21b may be configured by, for example, a stacked body of a plurality of conductive layers made of the above metals or alloys.
　電極２１ａ、２１ｂの形成方法は、特に限定されない。電極２１ａ，２１ｂは、例えば、Ａｇペースト等の導電性ペーストを用いて形成することができる。また、電極２１ａ，２１ｂは、例えば、スパッタ法、蒸着法、スクリーン印刷法或いはメッキ法等を用いて形成することができる。 The formation method of the electrodes 21a and 21b is not particularly limited. The electrodes 21a and 21b can be formed using a conductive paste such as an Ag paste, for example. The electrodes 21a and 21b can be formed using, for example, a sputtering method, a vapor deposition method, a screen printing method, a plating method, or the like.
　なお、本実施形態においては、電極２１ｂは、電極２１ａと実質的に同様の構成を有している。このため、ここでは、電極２１ａの構成について詳細に説明する。電極２１ｂについては、電極２１ａに関する説明を援用することとする。 In the present embodiment, the electrode 21b has substantially the same configuration as the electrode 21a. Therefore, here, the configuration of the electrode 21a will be described in detail. For the electrode 21b, the description relating to the electrode 21a is cited.
　電極２１ａは、複数のフィンガー電極部３１と、少なくともひとつのバスバー部３３とを含む。本実施形態では、バスバー部３３が２本設けられている。しかしながら、バスバー部３３は、１本のみ設けられていてもよいし、３本以上設けられていてもよい。バスバー部３３は、例えば、４本設けられていてもよい。 The electrode 21 a includes a plurality of finger electrode portions 31 and at least one bus bar portion 33. In the present embodiment, two bus bar portions 33 are provided. However, only one bus bar portion 33 may be provided, or three or more bus bar portions 33 may be provided. For example, four bus bar portions 33 may be provided.
　複数のフィンガー電極部３１のそれぞれは、ｙ方向に対して垂直なｘ方向に沿って延びている。複数のフィンガー電極部３１は、ｙ方向に沿って配列されている。複数のフィンガー電極部３１は、互いに平行である。 Each of the plurality of finger electrode portions 31 extends along the x direction perpendicular to the y direction. The plurality of finger electrode portions 31 are arranged along the y direction. The plurality of finger electrode portions 31 are parallel to each other.
　複数のフィンガー電極部３１のそれぞれは、透明導電膜２５ａの端辺に至るように設けられている。すなわち、複数のフィンガー電極部３１のそれぞれのｘ方向の一方側端部が、透明導電膜２５ａのｘ方向の一方側に位置している端辺に至っている。複数のフィンガー電極部３１のそれぞれのｘ方向の他方側端部が、透明導電膜２５ａのｘ方向の他方側に位置している端辺に至っている。具体的には、本実施形態では、複数のフィンガー電極部３１のそれぞれは、透明導電膜２５ａの端辺を超えて、受光面２０ａの直上にまで至っている。すなわち、複数のフィンガー電極部３１のそれぞれのｘ方向の一方側端部が、透明導電膜２５ａのｘ方向の一方側に位置している端辺よりもｘ方向の一方側にまで至っている。複数のフィンガー電極部３１のそれぞれのｘ方向の他方側端部が、透明導電膜２５ａのｘ方向の他方側に位置している端辺よりもｘ方向の他方側にまで至っている。 Each of the plurality of finger electrode portions 31 is provided so as to reach the end side of the transparent conductive film 25a. That is, one end portion in the x direction of each of the plurality of finger electrode portions 31 reaches an end side located on one side in the x direction of the transparent conductive film 25a. The other end portion in the x direction of each of the plurality of finger electrode portions 31 reaches an end side located on the other side in the x direction of the transparent conductive film 25a. Specifically, in the present embodiment, each of the plurality of finger electrode portions 31 extends beyond the edge of the transparent conductive film 25a and directly above the light receiving surface 20a. That is, one side end portion in the x direction of each of the plurality of finger electrode portions 31 extends to one side in the x direction from an end side located on one side in the x direction of the transparent conductive film 25a. The other end portion in the x direction of each of the plurality of finger electrode portions 31 reaches the other side in the x direction from the end side located on the other side in the x direction of the transparent conductive film 25a.
　フィンガー電極部３１の幅は、特に限定されないが、例えば、５０μｍ～２００μｍ程度とすることができる。フィンガー電極部３１のｙ方向に沿ったピッチも特に限定されないが、例えば、１ｍｍ～３ｍｍ程度とすることができる。 The width of the finger electrode part 31 is not particularly limited, but can be, for example, about 50 μm to 200 μm. The pitch along the y direction of the finger electrode portion 31 is not particularly limited, but may be, for example, about 1 mm to 3 mm.
　バスバー部３３は、ｙ方向に沿って延びている。複数のバスバー部３３は、ｘ方向に沿って配列されている。複数のバスバー部３３のそれぞれは、複数のフィンガー電極部３１に電気的に接続されている。バスバー部３３の幅は、フィンガー電極部３１の幅よりも大きいことが好ましく、例えば、０．５ｍｍ～２ｍｍ程度とすることができる。 The bus bar portion 33 extends along the y direction. The plurality of bus bar portions 33 are arranged along the x direction. Each of the plurality of bus bar portions 33 is electrically connected to the plurality of finger electrode portions 31. The width of the bus bar portion 33 is preferably larger than the width of the finger electrode portion 31, and can be, for example, about 0.5 mm to 2 mm.
　なお、本実施形態では、配線材１１は、バスバー部３３と平行に配されている。配線材１１は、バスバー部３３の上に設けられている。 In this embodiment, the wiring member 11 is arranged in parallel with the bus bar portion 33. The wiring member 11 is provided on the bus bar portion 33.
　また、バスバー部３３は、直線状である必要は必ずしもない。バスバー部は、例えば、ジグザグ状であってもよい。 Further, the bus bar portion 33 is not necessarily required to be linear. The bus bar portion may be in a zigzag shape, for example.
　ところで、図５に示すように、フィンガー電極部１３１の端部が透明導電膜１２５ａの端辺に至っていない場合は、透明導電膜１２５ａの端縁部１２５ａ１で生成したキャリア１３５がフィンガー電極部１３１により収集されるまでに移動しなければならない距離が長くなる。このため、端縁部１２５ａ１における集電抵抗が高くなる。その結果、光電変換効率が低くなる傾向にある。 By the way, as shown in FIG. 5, when the end portion of the finger electrode portion 131 does not reach the end side of the transparent conductive film 125 a, the carrier 135 generated at the end portion 125 a 1 of the transparent conductive film 125 a is caused by the finger electrode portion 131. The distance that must be traveled before being collected increases. For this reason, the current collection resistance in the edge part 125a1 becomes high. As a result, the photoelectric conversion efficiency tends to decrease.
　それに対して、図６にも示すように、フィンガー電極部３１の端部が透明導電膜２５ａの端辺に至っている本実施形態の太陽電池セル１０においては、端縁部２５ａ１で生成したキャリア３５がフィンガー電極部３１により収集されるまでに移動しなければならない距離が短くなる。このため、端縁部２５ａ１における集電抵抗を低くすることができる。その結果、光電変換効率を改善することができる。 On the other hand, as shown also in FIG. 6, in the solar cell 10 of the present embodiment in which the end portion of the finger electrode portion 31 reaches the end side of the transparent conductive film 25a, the carrier 35 generated at the edge portion 25a1. The distance that must be traveled before is collected by the finger electrode portion 31 is shortened. For this reason, the current collection resistance in the edge part 25a1 can be made low. As a result, the photoelectric conversion efficiency can be improved.
　具体的に、本実施形態の太陽電池セル１０と、フィンガー電極部の端部が透明導電膜の端辺に至っていない以外は太陽電池セル１０と実質的に同様の形態を有する太陽電池セルとを作製し、光電変換効率を測定した。その結果、フィンガー電極部３１の端部が透明導電膜２５ａの端辺に至っている本実施形態の太陽電池セル１０の方が、フィンガー電極部の端部が透明導電膜の端辺に至っていない太陽電池セルよりも光電変換効率が約１％高くなることが確認された。 Specifically, the solar battery cell 10 of the present embodiment and a solar battery cell having substantially the same form as the solar battery cell 10 except that the end of the finger electrode portion does not reach the end of the transparent conductive film. It produced and measured the photoelectric conversion efficiency. As a result, the solar cell 10 of the present embodiment in which the end portion of the finger electrode portion 31 reaches the end side of the transparent conductive film 25a is the sun in which the end portion of the finger electrode portion does not reach the end side of the transparent conductive film. It was confirmed that the photoelectric conversion efficiency was about 1% higher than that of the battery cell.
　また、本実施形態では、複数のフィンガー電極部３１のそれぞれは、透明導電膜２５ａの端辺を超えて、受光面２０ａの直上にまで至っている。このため、例えば、フィンガー電極部３１のｘ方向における形成位置がずれた場合であっても、フィンガー電極部３１の端部が透明導電膜２５ａの端辺に確実に至るようにすることができる。従って、改善された光電変換効率を有する太陽電池セル１０を安定して製造することができる。 In the present embodiment, each of the plurality of finger electrode portions 31 extends beyond the edge of the transparent conductive film 25a and directly above the light receiving surface 20a. For this reason, for example, even when the formation position of the finger electrode portion 31 in the x direction is shifted, the end portion of the finger electrode portion 31 can surely reach the end side of the transparent conductive film 25a. Therefore, the solar battery cell 10 having improved photoelectric conversion efficiency can be stably manufactured.
　なお、本実施形態では、受光面２０ａ側の電極２１ａと、裏面２０ｂ側の電極２１ｂとの両方が複数のフィンガー電極部３１を有し、かつ、フィンガー電極部３１が透明導電膜２５ａの端辺に至っている例について説明した。但し、本発明は、この構成に限定されない。例えば、受光面側の電極及び裏面側の電極のうちの一方が、異なる形態の電極であってもよい。具体的には、例えば、裏面側の電極が金属や合金からなる面状電極であってもよい。 In the present embodiment, both the electrode 21a on the light receiving surface 20a side and the electrode 21b on the back surface 20b side have a plurality of finger electrode portions 31, and the finger electrode portions 31 are edges of the transparent conductive film 25a. The example that led to was explained. However, the present invention is not limited to this configuration. For example, one of the electrode on the light receiving surface side and the electrode on the back surface side may be an electrode having a different form. Specifically, for example, the electrode on the back surface side may be a planar electrode made of metal or alloy.
　以下、本発明を実施した好ましい形態の他の例や変形例について説明する。以下の説明において、上記第１の実施形態と実質的に共通の機能を有する部材を共通の符号で参照し、説明を省略する。また、第２の実施形態において、図１を上記第１の実施形態と共通に参照する。 Hereinafter, other examples and modifications of the preferred embodiment in which the present invention is implemented will be described. In the following description, members having substantially the same functions as those of the first embodiment are referred to by the same reference numerals, and description thereof is omitted. In the second embodiment, FIG. 1 is referred to in common with the first embodiment.
　（第２の実施形態）
　図７は、第２の実施形態における太陽電池セルの受光面の略図的平面図である。 (Second Embodiment)
FIG. 7 is a schematic plan view of the light receiving surface of the solar battery cell in the second embodiment.
　本実施形態の太陽電池モジュールは、太陽電池セル１０の電極２１ａ、２１ｂがバスバー部を有さない点においてのみ上記第１の実施形態に係る太陽電池モジュール１と異なっている。このため、上記第１の実施形態のバスバー部３３以外の説明を本実施形態に援用するものとする。 The solar cell module of the present embodiment is different from the solar cell module 1 according to the first embodiment only in that the electrodes 21a and 21b of the solar cell 10 do not have a bus bar portion. For this reason, description other than the bus-bar part 33 of the said 1st Embodiment shall be used for this embodiment.
　本実施形態においても、フィンガー電極部３１の端部が透明導電膜２５ａの端辺に至っている。このため、本実施形態に係る太陽電池モジュールも、上記第１の実施形態に係る太陽電池モジュール１と同様に、改選された光電変換効率を有する。また、本実施形態に係る太陽電池モジュールも、改善された光電変換効率で安定して製造することができる。 Also in the present embodiment, the end portion of the finger electrode portion 31 reaches the end side of the transparent conductive film 25a. For this reason, the solar cell module which concerns on this embodiment also has the photoelectric conversion efficiency selected as well as the solar cell module 1 which concerns on the said 1st Embodiment. Moreover, the solar cell module according to the present embodiment can also be stably manufactured with improved photoelectric conversion efficiency.
　（第１及び第２の変形例）
　図８は、第１の変形例における太陽電池セルの受光面の略図的平面図である。図９は、第２の変形例における太陽電池セルの受光面の略図的平面図である。 (First and second modifications)
FIG. 8 is a schematic plan view of the light receiving surface of the solar battery cell in the first modification. FIG. 9 is a schematic plan view of the light receiving surface of the solar battery cell in the second modification.
　上記第１及び第２の実施形態では、複数のフィンガー電極部３１のそれぞれは、透明導電膜２５ａの端辺を超えて、受光面２０ａの直上にまで至っている例について説明した。但し、本発明は、フィンガー電極部が透明導電膜の端辺に至っている限りにおいて、この構成に限定されない。例えば、図８や図９に示すように、複数のフィンガー電極部３１のそれぞれの端部と、透明導電膜２５ａの端辺とが一致していてもよい。 In the first and second embodiments described above, the example in which each of the plurality of finger electrode portions 31 extends beyond the edge of the transparent conductive film 25a and directly above the light receiving surface 20a has been described. However, the present invention is not limited to this configuration as long as the finger electrode portion reaches the end of the transparent conductive film. For example, as shown in FIGS. 8 and 9, the end portions of the plurality of finger electrode portions 31 may coincide with the end sides of the transparent conductive film 25 a.
なお、第１及び第２の実施形態並びに第１及び第２の変形例では、複数のフィンガー電極部３１のすべてが透明導電膜２５ａの端辺に至っている例について説明した。但し、本発明は、複数のフィンガー電極のうちのいくつかが透明導電膜の端辺に至っている限りにおいて特に限定されない。例えば、透明導電膜の端辺に至っているフィンガー電極と、透明導電膜の端辺に至っていないフィンガー電極とが交互に配列されていてもよい。 In the first and second embodiments and the first and second modified examples, the example in which all of the plurality of finger electrode portions 31 reach the end side of the transparent conductive film 25a has been described. However, the present invention is not particularly limited as long as some of the plurality of finger electrodes reach the edge of the transparent conductive film. For example, finger electrodes reaching the end sides of the transparent conductive film and finger electrodes not reaching the end sides of the transparent conductive film may be alternately arranged.
１…太陽電池モジュール
１０…太陽電池セル
１１…配線材
１３…封止材
１４…第１の保護部材
１５…第２の保護部材
２０…光電変換部
２０ａ…受光面
２０ｂ…裏面
２１ａ，２１ｂ…電極
２５ａ、２５ｂ…透明導電膜
３１…フィンガー電極部
３３…バスバー部
３５…キャリア DESCRIPTION OF SYMBOLS 1 ... Solar cell module 10 ... Solar cell 11 ... Wiring material 13 ... Sealing material 14 ... 1st protection member 15 ... 2nd protection member 20 ... Photoelectric conversion part 20a ... Light-receiving surface 20b ... Back surface 21a, 21b ... Electrode 25a, 25b ... transparent conductive film 31 ... finger electrode part 33 ... bus bar part 35 ... carrier

Claims (6)

  1. 　矩形状の光電変換部と、
    　前記光電変換部の一主面の端縁部を除いた部分を覆うように設けられている面状の透明導電膜と、
    　前記透明導電膜の上に配された電極と、
    を備え、
    　前記電極は、
    　前記第１の方向に沿って延び、前記第１の方向に対して垂直な第２の方向に沿って配列された複数のフィンガー電極部を含み、
    　前記フィンガー電極部は、前記透明導電膜の端辺に至るように設けられている、太陽電池セル。     A rectangular photoelectric conversion unit;
    A planar transparent conductive film provided so as to cover a portion excluding an edge of one main surface of the photoelectric conversion unit;
    An electrode disposed on the transparent conductive film;
    With
    The electrode is
    A plurality of finger electrode portions extending along the first direction and arranged along a second direction perpendicular to the first direction;
    The said finger electrode part is a photovoltaic cell provided so that the end side of the said transparent conductive film may be reached.
  2. 　前記フィンガー電極部は、前記透明導電膜の端辺を超えて、前記光電変換部の一主面の端縁部の上にまで至っている、請求項１に記載の太陽電池セル。 The solar cell according to claim 1, wherein the finger electrode portion extends beyond an edge of the transparent conductive film to reach an edge of one main surface of the photoelectric conversion portion.
  3. 　前記光電変換部の一主面は受光面である、請求項１または２に記載の太陽電池セル。 The solar cell according to claim 1, wherein one main surface of the photoelectric conversion unit is a light receiving surface.
  4. 　複数の太陽電池セルと、前記複数の太陽電池セルを電気的に接続している配線材とを備える太陽電池モジュールであって、
    　前記太陽電池セルは、
    　矩形状の光電変換部と、
    　前記光電変換部の一主面の端縁部を除いた部分を覆うように設けられている面状の透明導電膜と、
    　前記透明導電膜の上に配された電極と、
    を有し、
    　前記電極は、
    　前記第１の方向に沿って延び、前記第１の方向に対して垂直な第２の方向に沿って配列されており、前記配線材に電気的に接続されている複数のフィンガー電極部を含み、
    　前記フィンガー電極部は、前記透明導電膜の端辺に至るように設けられている、太陽電池モジュール。     A solar cell module comprising a plurality of solar cells and a wiring material electrically connecting the plurality of solar cells,
    The solar battery cell is
    A rectangular photoelectric conversion unit;
    A planar transparent conductive film provided so as to cover a portion excluding an edge of one main surface of the photoelectric conversion unit;
    An electrode disposed on the transparent conductive film;
    Have
    The electrode is
    A plurality of finger electrode portions extending along the first direction and arranged along a second direction perpendicular to the first direction and electrically connected to the wiring member; ,
    The said finger electrode part is a solar cell module provided so that the end side of the said transparent conductive film may be reached.
  5. 　前記フィンガー電極部は、前記透明導電膜の端辺を超えて、前記光電変換部の一主面の端縁部の上にまで至っている、請求項４に記載の太陽電池モジュール。 5. The solar cell module according to claim 4, wherein the finger electrode portion extends beyond an edge of the transparent conductive film and reaches an edge of one principal surface of the photoelectric conversion portion.
  6. 　前記光電変換部の一主面は受光面である、請求項４または５に記載の太陽電池モジュール。 The solar cell module according to claim 4 or 5, wherein one main surface of the photoelectric conversion unit is a light receiving surface.
PCT/JP2011/077133 2010-11-29 2011-11-25 Solar battery cell and solar battery module WO2012073802A1 (en)

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