JP2009515336A - 高効率の太陽電池及びその調製方法 - Google Patents
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Abstract
Description
(a)第1導電型半導体基板上に、前記基板とは反対の導電型の第2導電型半導体層を形成し、それによってそれらの間の界面にp−n接合を形成する段階、
(b)前記第2導電型半導体層上に酸窒化シリコンのパッシベーション層を形成する段階、
(c)前記パッシベーション層上に窒化シリコンの反射防止層を形成する段階、
(d)前記第1導電型半導体基板の後方表面上に電極を形成する段階、
(e)前記反射防止層上に、前記第2導電型半導体層に接続される電極を形成する段階。
本発明は以下の例を参照してより詳細に説明されるであろう。これらの例は本発明を説明するためだけに提供され、本発明の範囲及び精神を制限するものであると解釈されるべきではない。
リン−ドープn型エミッタ層がホウ素ドープp型シリコン基板上に形成され、p−n接合が形成された。パッシベーション層としての酸窒化シリコン(SiOxNy)がn型エミッタ層上に、PECVD法によって、30nmの厚みで堆積された。その後、反射防止層としての屈折率1.9を有する窒化シリコン(SiNx)が、PECVD法によって、酸窒化シリコンパッシベーション層上に堆積された。その後、Al−含有ペーストはp型シリコン基板上にスクリーン印刷され、Ag−含有ペーストは窒化シリコン層上にスクリーン印刷され、それによってパターンを形成した。結果として得られる構造体は約800℃で約30秒間焼成され、p型シリコン基板に接続された背面電極及びn型エミッタ層に接続された前面電極を同時に形成し、それによって太陽電池が作製された。
太陽電池は、パッシベーション層としての酸窒化シリコンの代わりに二酸化シリコン(SiO2)がn型エミッタ層上に堆積されたこと以外は、例1と同様の方法で作製された。
太陽電池は、酸窒化シリコンパッシベーション層がn型エミッタ層上に堆積されなかったこと以外は、例1と同じ方法で作製された。
実施例1、比較例1及び2で作製された太陽電池の効率を測定するため、解放電圧(Voc)及び短絡回路電流(Jsc)が各々測定された。その後、このように測定されたVoc及びJscの値に基づき、曲線因子(FF)及び太陽電池効率が測定された。得られた結果は表1に説明される。ここで、曲線因子(FF)は(Vmp×Jmp)/(Voc×Jsc)として定義され、Jmp及びVmpは電流密度及び最大出力点における電圧を表す。太陽電池効率はPmax/Pinで与えられ、Pmaxは電池によって生成される最大出力を表し、システム内部への入力パワー、Pin、は入射光強度、すなわち単位時間あたりシステムに供給される光エネルギー、で定義される。
12 第2導電型半導体層
13 p−n接合
14 パッシベーション層
15 反射防止層
21 背面電極
22 前面電極
Claims (10)
- 第1導電型半導体基板、前記第1導電型半導体基板の上に形成され、該基板とは反対の導電型を有する第2導電型半導体層、それらの間の界面におけるp−n接合、前記第1導電型半導体基板と少なくとも部分的に接触する背面電極、前記第2導電型半導体層と少なくとも部分的に接触する前面電極、及び前記第1導電型半導体基板の後方表面上及び/又は前記第2導電型半導体層の前方表面上に連続して形成される酸窒化シリコンパッシベーション層及び窒化シリコン反射防止層を含む太陽電池。
- 前記パッシベーション層の厚みが1から40nmである、請求項1に記載の太陽電池。
- 前記反射防止層の屈折率が1.9から2.3である、請求項1に記載の太陽電池。
- 前記パッシベーション層及び前記反射防止層は前記第2導電型半導体層の前方表面上に形成される、請求項1に記載の太陽電池。
- 前記第1導電型半導体基板はp型シリコン基板であり、前記第2導電型半導体層はn型エミッタ層である、請求項1に記載の太陽電池。
- (a)第1導電型半導体基板上に、前記基板とは反対の導電型の第2導電型半導体層を形成し、それによってそれらの間の界面にp−n接合を形成する段階と、
(b)前記第2導電型半導体層上に酸窒化シリコンのパッシベーション層を形成する段階と、
(c)前記パッシベーション層上に窒化シリコンの反射防止層を形成する段階と、
(d)前記第1導電型半導体基板の後方表面上に電極を形成する段階と、
(e)前記反射防止層上に、前記第2導電型半導体層に接続される電極を形成する段階と、を含む太陽電池の調製方法。 - 前記第1導電型半導体基板はp型シリコン基板であり、前記第2導電型半導体層はn型エミッタ層である、請求項6に記載の方法。
- 前記パッシベーション層がプラズマ化学気相成長法(PECVD)によってn型エミッタ層上に形成される、請求項7に記載の方法。
- 前記反射防止層がプラズマ化学気相成長法(PECVD)によってパッシベーション層上に形成される、請求項7に記載の方法。
- 前記前面電極は前記反射防止層の上部の上への銀(Ag)含有ペーストのスクリーン印刷によって、及び印刷されたペーストを焼成することによって形成され、前記背面電極は前記第1導電型半導体基板上へのアルミニウム(Al)含有ペーストのスクリーン印刷によって、及び印刷されたペーストを焼成することによって形成される、請求項6に記載の方法。
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PCT/KR2006/004439 WO2007055484A1 (en) | 2005-11-08 | 2006-10-30 | Solar cell of high efficiency and process for preparation of the same |
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US (1) | US20070175508A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
EP1949450B1 (en) | 2015-01-21 |
US20070175508A1 (en) | 2007-08-02 |
TWI368997B (en) | 2012-07-21 |
KR100877817B1 (ko) | 2009-01-12 |
KR20070049555A (ko) | 2007-05-11 |
JP5409007B2 (ja) | 2014-02-05 |
CN101840962A (zh) | 2010-09-22 |
EP1949450A1 (en) | 2008-07-30 |
EP1949450A4 (en) | 2012-08-01 |
WO2007055484A1 (en) | 2007-05-18 |
CN101305472A (zh) | 2008-11-12 |
TW200723553A (en) | 2007-06-16 |
CN101305472B (zh) | 2011-07-13 |
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