JP4981020B2 - 集積型薄膜太陽電池、その製造方法と集積型薄膜太陽電池用透明電極の加工方法、その構造及びその透明電極が形成された透明基板 - Google Patents
集積型薄膜太陽電池、その製造方法と集積型薄膜太陽電池用透明電極の加工方法、その構造及びその透明電極が形成された透明基板 Download PDFInfo
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- H—ELECTRICITY
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- 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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1884—Manufacture of transparent electrodes, e.g. TCO, ITO
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- 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
- H01L31/022466—Electrodes made of transparent conductive layers, e.g. TCO, ITO layers
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- 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
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- 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
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- 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
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Description
また、太陽電池は、半導体の厚さによってバルク(基板)型太陽電池と薄膜型太陽電池に分類されるのに、 薄膜型太陽電池は半導体層の厚さが数10umないし数um以下の太陽電池である。
薄膜型太陽電池は、バルク型太陽電池に比べて大きい面積での製作が容易であるとの長所があるが、一方で受光面側の透明電極の抵抗のため、エネルギー変換効率については面積が大きくなるほど減少するという短所がある。
このような問題を解決するために開発されたものが集積型薄膜太陽電池の構造である。この構造は、透明電極が帯形状で複数に分割され、その上に形成された小さい単位セルが互いに電気的に直列連結された構造となっているため、透明電極の抵抗による電力損失を減らすことができる。また、大きい面積で製作する場合にも変換効率の低下を小さくすることができる。なお、集積型構造によって一枚の基板から実用的な高い電圧を得ることができるため、モジュール組立工程を簡単化することができる。
しかし、このような集積型薄膜太陽電池の構造及び製作工程にも様々な問題点がある。これについては、以下説明する。
まず、 絶縁透明基板10の上部全面(全面)に形成された透明電極22を、図2に示すようにレーザーパターニング法で切断して一定の幅を持つ帯形態で切断(絶縁)すれば、 加工された切断幅は、50umないし数100um位になるのが一般的である。
また、本発明の他の目的は、前述の集積型薄膜太陽電池を製造する場合においてモジュールの性能低下を防止して製造単価を節減するための製造方法を提供することにある。
図3は本発明による集積型薄膜太陽電池のモジュール構造を示す断面図である。示すように、本発明による集積型薄膜太陽電池は所定基板1上に傾斜断面を持つ透明電極2と、 太陽電池(半導体)層3、1次裏面電極4、2次裏面電極5が順番どおり積層された構造からなっている。1次裏面電極4、2次裏面電極5は伝導物質で構成される。
ここで基板1は、ガラスや透明プラスチックなどの絶縁透明基板で、透明電極2は、酸化亜鉛(Zinc Oxide(ZnO))、酸化柱石(Tin Oxide(SnO2))、酸化インジウム柱石(Indium Tin Oxide(ITO))内の何れか一つ以上の透明伝導膜が使われる。
<印刷法を利用した集積型薄膜太陽電池用透明電極の形成方法>
<写真蝕刻法を利用した集積型薄膜太陽電池用透明電極の形成方法>
<ゾルゲル法及び印刷法を利用した透明電極の形成方法>
以上のように本発明に対する技術思想を添付図面とともに説明したが、これは本発明の望
ましい実施形態の例示説明であり、本発明を限定するものではなく、 本発明の技術思想のを逸脱しない範囲内で多様な変形と組み合わせが可能である。
Claims (13)
- (a)絶縁透明基板上に離隔されるようにパターニングされた透明電極を形成する段階と、
(b)前記(a)段階による基板の上に太陽電池(半導体)層を形成する段階と、
(c)前記太陽電池(半導体)層の上に伝導物質をななめに蒸着して1次裏面電極を形成する段階と、
(d)前記1次裏面電極をマスクとして使って前記太陽電池(半導体)層を蝕刻する段階と、
(e)前記(d)段階後の基板の上に伝導物質をななめに蒸着することにより、前記透明電極の、前記太陽電池(半導体)層の蝕刻により露出した部分とその隣り合った前記1次裏面電極が電気的に繋がれるように2次裏面電極を形成する段階と、
を含むことを特徴とする集積型薄膜太陽電池の製造方法。 - 前記(a)段階は、
(a−1)前記基板上に薄膜の透明電極を形成する段階と、
(a−2)前記透明電極上に離隔されるようにフォトレジスト(photoresist;PR)またはポリマーパターンを形成する段階と、
(a−3)前記フォトレジストまたはポリマーパターンをマスクとして使って前記透明電極をエッチングする段階と、
(a−4)前記フォトレジストまたはポリマーパターンを取り除く段階と、
を含むことを特徴とする、請求項1記載の集積型薄膜太陽電池の製造方法。 - 前記透明電極は、酸化亜鉛(Zinc Oxide (ZnO))、酸化錫 (Tin Oxide(SnO2))または酸化インジウム錫(Indium Tin Oxide(ITO))の内の何れか一つ以上により形成されたことを特徴とする、請求項2記載の集積型薄膜太陽電池の製造方法。
- 前記(a−3)段階では、前記透明電極のエッチングは等方性蝕刻法であることを特徴とする、請求項2記載の集積型薄膜太陽電池の製造方法。
- 前記(a−3)段階では、前記透明電極のエッチングはメッサ(mesa)エッチングであることを特徴とする、請求項2記載の集積型薄膜太陽電池の製造方法。
- 前記(a−3)段階では、前記透明電極のエッチングは異方性蝕刻法であることを特徴とする、請求項2記載の集積型薄膜太陽電池の製造方法。
- 前記(d)段階は前記太陽電池(半導体)層を前記基板から垂直方向にエッチングすることを特徴とする、請求項4または5記載の集積型薄膜太陽電池の製造方法。
- 前記(d)段階は前記太陽電池(半導体)層を前記基板から傾いた方向にエッチングすることを特徴とする、請求項6記載の集積型薄膜太陽電池の製造方法。
- 前記(e)段階の伝導物質の蒸着は、電子ビームまたは熱蒸着からなり、前記(e)段階の伝導物質の蒸着によって、隣り合った単位素子同士が電気的に直列接続されることを特徴とする、請求項1記載の集積型薄膜太陽電池の製造方法。
- 前記(b)段階の前記太陽電池は、シリコン系薄膜太陽電池、化合物系薄膜太陽電池、
有機物系太陽電池、乾式染料感応型太陽電池の内の何れか一つ以上を利用したことを特徴とする、請求項1記載の集積型薄膜太陽電池の製造方法。 - 前記シリコン系薄膜太陽電池は、非晶質シリコン単一接合太陽電池(amorphous silicon(a−Si:H) single junction solar cell)、非晶質シリコン多重接合太陽電池(a−Si:H/a−Si:H、a−Si:H/a−Si:H/a−Si:H multi−junction solar cell)、非晶質シリコンゲルマニウム単一接合太陽電池(amorphous silicon−germanium(a−SiGe:H) single junction solar cell)、非晶質シリコン/非晶質シリコンゲルマニウム二重接合太陽電池(a−Si:H/a−SiGe:H double junction solar cell)、非晶質シリコン/非晶質シリコンゲルマニウム/非晶質シリコンゲルマニウム三重接合太陽電池(a−Si:H/a−SiGe:H/a−SiGe:H triple
junction solar cell)、非晶質シリコン/マイクロ結晶シリコン(多結晶シリコン) 二重接合太陽電池(amorphous silicon/microcrystalline(poly) silicon double junction
solar cell)の内の何れか一つ以上を利用したことを特徴とする、請求項10記載の集積型薄膜太陽電池の製造方法。 - 前記1次及び2次裏面電極は銀(Ag)、アルミニウム(Al)、または金(Au)の内の何れか一つ以上を利用したことを特徴とする、請求項1記載の薄膜太陽電池の製造方法。
- 請求項1記載の薄膜太陽電池の製造方法によって単位素子間を電気的に直列連結して集積化されたことを特徴とする薄膜太陽電池。
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KR1020050021771A KR20060100108A (ko) | 2005-03-16 | 2005-03-16 | 집적형 박막 태양전지용 투명전극의 가공 방법과 그 구조,그 투명전극이 형성된 투명기판 |
KR1020050021895A KR100756286B1 (ko) | 2005-03-16 | 2005-03-16 | 집적형 박막 태양전지 및 그 제조 방법 |
KR10-2005-0021895 | 2005-03-16 | ||
KR10-2005-0021771 | 2005-03-16 | ||
PCT/KR2006/000973 WO2006107154A1 (en) | 2005-03-16 | 2006-03-16 | Integrated thin-film solar cells and method of manufacturing thereof and processing method of transparent electrode for integrated thin-film solar cells and structure thereof, and transparent substrate having processed transparent electrode |
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