JP2013524499A - 増強光捕捉スキームによる薄膜光起電力素子 - Google Patents
増強光捕捉スキームによる薄膜光起電力素子 Download PDFInfo
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Abstract
Description
図4に記載した構造の配列を含有するポリマーシートを作る。2つの光吸収活性層のタンデム接合セル構造をベースとした薄膜シリコンモジュールを作り、その際、上部セルは非晶質シリコンからなり且つ底部セルは微結晶シリコンからなる。モジュール中のTCOは、アルミニウムドープ酸化亜鉛の非テクスチャード加工の50nmの厚い層をベースとする。銀は反射性背面電極として使用される。ポリマーシートを、EVAのシートでラミネート加工することによって薄膜シリコンモジュールのガラスフロントカバーに適用する。
図4に記載した構造の配列を含有するポリマーシートを作る。2つの光吸収活性層のタンデム接合セル構造をベースとした薄膜シリコンモジュールを作り、その際、上部セルは非晶質シリコンからなり且つ底部セルは微結晶シリコンからなる。モジュール中のTCOは、アルミニウムドープ酸化亜鉛の非テクスチャード加工の50nmの厚い層をベースとする。銀は反射性背面電極として使用される。ポリマーシートを、シリコンベースの接着剤によって薄膜シリコンモジュールのガラスフロントカバーに適用する。
図4に記載した構造の配列を含有するポリマーシートを作る。テクスチャード加工のカバープレート、非テクスチャード加工の100〜400nmのZnO、150〜200nmのa−Sii−層、500〜800nmのμc−Sii−層を含む−Si/μc−Siベースの光起電力モジュールをベースとした薄膜シリコンモジュールを作る。銀を反射性背面電極として使用する。ポリマーシートを、ポリマー接着剤を使用することによって薄膜シリコンモジュールのガラスフロントカバーに適用する。
図1は、活性材料の厚さの減少方法を概略的に示す。
図2は、レリーフテクスチャード加工の透明カバープレート、非テクスチャード加工のTCO、光吸収活性層及び反射性背面電極を含む光起電力素子を概略的に示す。
図3は、異なる幾何光学的レリーフ構造の選択を概略的に示す。
図4a−eは、別の視点での単一構造とこの構造の配列を概略的に示す。
図1は、活性材料又は活性層2の層厚さを減少させるための先行技術による方法を概略的に示す。これは前面電極又はTCO1中に、光を反射するテクスチャーを作り出すためである。光の反射の結果、活性材料2中への光の光路長が増大する。しかしながら、光の反射に対する制御は制限されるので、光路長の増大は少ない。また、テクスチャーはTCO1に欠陥を生じさせ、これは自由キャリアの吸収と、それによる光起電力素子の効率の低下をもたらす。更に、TCO1は完全に透明ではないので入射光を幾らか吸収する。TCO1をテクスチャード加工するために、光をより多く吸収する、より厚いTCO材料1の層を使用することが必要である。その結果、より少ない光が光吸収活性層2に到達し、これが電荷キャリアに変換され得る。また、これは薄膜光起電力素子の効率を低下させる。ランダムにテクスチャード加工されたTCO1の頂部に透明なカバー5を提供する。反射性背面電極3には、保護背面層4が積層されている。
図2は、本発明の実施態様を概略的に示しており、その際、薄膜光起電力素子が、レリーフテクスチャード加工の透明カバープレート7、非テクスチャード加工のTCO6、光吸収活性層2及び反射性背面電極3を含むことが示される。レリーフテクスチャード加工の透明カバープレート7は、光(例えば、太陽光)を、レリーフテクスチャーへの入射時に少なくとも部分的に透過させ且つ反対側からの入射時に少なくとも部分的に反射させる(例えば、光が反射性背面電極によって反射される)。その結果、本発明による光起電力素子への入射光は、反射性背面電極3と表面テクスチャーとの間で少なくとも部分的に捕捉される。この捕捉のために、光吸収活性層の光路長は増大し、それゆえに層厚さを最小に維持することができる。あるいは増大した光路長は、更に効率的な素子を作り出すために使用される。更に、平坦なTCO6(即ち、非テクスチャード加工のTCO)を使用することでTCO6を薄くすることができ、その結果、TCO6中の光の吸収が少なくなる。また、表面テクスチャーの欠落により、TCO6による自由電荷キャリアの吸収は低下する。
図3は、底面、頂部、並びに底面と頂部とを接続する表面一式を含有する、幾つかの好ましい個々の幾何光学的レリーフ構造を概略的に示す。頂部とは、底面に接続された表面一式が合わさる個々の構造の上部として定義されている。頂部は、点(例えば、ピラミッド又は円すいにみられる)、小さい面積(例えば、平坦な上部のピラミッド又は円すい)又は線(例えば、溝にみられる)であってよい。本発明によるレリーフ構造の例は複数ある。
図4は、レリーフ構造の更なる実施態様を概略的に示す。ここで、単一構造は、少なくとも3つのn−多角形表面(nは4以上である)によって接続された底面と頂部を含む。図4aは、底面と頂部とをつなげる3つの4−多角形表面を有する構造の三次元表示を示す。図4bは、図4aの構造の上面図を示す。図4cは、この構造の0°軸方向の側面図を示し、図4dは60°軸方向の側面図を示す。図4eは図4aの構造の配列を示す。
Claims (12)
- レリーフテクスチャード加工の透明カバープレート(7)、700nm未満の層厚さを有する透明導電性酸化物の層、光吸収活性層(2)及び反射性背面電極(3)を含む薄膜光起電力素子であって、前記透明導電性酸化物の層が非テクスチャード加工の層(6)である、前記薄膜光起電力素子。
- 反射性背面電極(3)がテクスチャード加工されていない、請求項1に記載の素子。
- 透明カバープレート(7)のみがテクスチャード加工されている、請求項1又は2に記載の素子。
- 透明カバープレート(7)の受光面がレリーフテクスチャード加工されている、請求項1から3までのいずれか1項に記載の素子。
- 透明カバープレート(7)が、底面、頂部、並びに底面と頂部とを接続する表面一式を含有する、幾何光学的レリーフ構造の配列を含むことによってレリーフ構造化されている、請求項1から4までのいずれか1項に記載の素子。
- 幾何光学的レリーフ構造の配列が、少なくとも3つのn−多角形表面(nは4以上である)によって接続された底面と頂部を有する単一の光学的レリーフ構造を含む、請求項5に記載の素子。
- レリーフテクスチャード加工の透明カバープレート(7)がポリマー材料で作られている、請求項1から6までのいずれか1項に記載の素子。
- レリーフテクスチャード加工のカバープレート(7)がガラスプレートに適用される、請求項1から7までのいずれか1項に記載の素子。
- 透明導電性酸化物の層がアルミニウムドープ酸化亜鉛で作られている、請求項1から8までのいずれか1項に記載の素子。
- 反射性背面電極(3)が銀で作られている、請求項1から9までのいずれか1項に記載の素子。
- 光吸収活性層(2)が複数の異なる吸収材料の層を含む、請求項1から10までのいずれか1項に記載の素子。
- 光吸収活性層(2)が非晶質シリコンの層と微結晶シリコンの層を含む、請求項11に記載の素子。
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EP10158760 | 2010-03-31 | ||
EP10158760.8 | 2010-03-31 | ||
PCT/EP2011/054998 WO2011121067A2 (en) | 2010-03-31 | 2011-03-31 | Thin film photovoltaic device with enhanced light trapping scheme |
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US (1) | US8872295B2 (ja) |
EP (1) | EP2553734A2 (ja) |
JP (1) | JP2013524499A (ja) |
CN (1) | CN102934234B (ja) |
MY (1) | MY185600A (ja) |
WO (1) | WO2011121067A2 (ja) |
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HUP1400380A2 (hu) * | 2014-08-07 | 2016-03-29 | Ecosolifer Ag | Napelem cella elrendezés |
US10330832B2 (en) * | 2015-06-25 | 2019-06-25 | Apple Inc. | High-luminance surface |
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US11691912B2 (en) | 2018-12-18 | 2023-07-04 | Apple Inc. | Chemically strengthened and textured glass housing member |
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2011
- 2011-03-31 US US13/638,768 patent/US8872295B2/en not_active Expired - Fee Related
- 2011-03-31 MY MYPI2012004327A patent/MY185600A/en unknown
- 2011-03-31 JP JP2013501849A patent/JP2013524499A/ja active Pending
- 2011-03-31 WO PCT/EP2011/054998 patent/WO2011121067A2/en active Application Filing
- 2011-03-31 EP EP11711563A patent/EP2553734A2/en not_active Withdrawn
- 2011-03-31 CN CN201180026633.4A patent/CN102934234B/zh not_active Expired - Fee Related
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US20080115828A1 (en) * | 2006-11-17 | 2008-05-22 | Guardian Industries Corp. | High transmission glass ground at edge portion(s) thereof for use in electronic device such as photovoltaic applications and corresponding method |
WO2009059998A1 (en) * | 2007-11-05 | 2009-05-14 | Photon Bv | Photovoltaic device |
Also Published As
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CN102934234B (zh) | 2015-08-05 |
WO2011121067A2 (en) | 2011-10-06 |
MY185600A (en) | 2021-05-25 |
EP2553734A2 (en) | 2013-02-06 |
US20130026593A1 (en) | 2013-01-31 |
US8872295B2 (en) | 2014-10-28 |
CN102934234A (zh) | 2013-02-13 |
WO2011121067A3 (en) | 2012-08-16 |
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