JP2007529907A - 太陽電池製造のための半導体の薄層を堆積する方法および装置 - Google Patents
太陽電池製造のための半導体の薄層を堆積する方法および装置 Download PDFInfo
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- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/30—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules comprising thin-film photovoltaic cells
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- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/10—Semiconductor bodies
- H10F77/12—Active materials
- H10F77/126—Active materials comprising only Group I-III-VI chalcopyrite materials, e.g. CuInSe2, CuGaSe2 or CuInGaSe2 [CIGS]
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H01L21/02365—Forming inorganic semiconducting materials on a substrate
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
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Abstract
Description
本出願は、参照により本明細書に組み込まれる、2004年3月15日に出願された先の米国仮出願第60/552,736号の利益を主張する。
本発明は電磁波検出器および光電変換用途のための半導体の薄膜を調製するための方法および装置に関する。
太陽電池は、日光を直接電力に変換する光電変換デバイスである。最も一般的な太陽電池材料は、単結晶または多結晶ウエハの形態にあるシリコンである。しかし、シリコン系太陽電池を用いて発生する電気のコストは、より伝統的な方法により発生する電気のコストより高い。したがって、1970年代初期以降、地上での使用のための太陽電池のコストを減少させるための努力がなされてきた。太陽電池のコストを下げる1つの方法は、大面積の基板上に太陽電池品質の吸収材料を堆積できる低コスト薄膜成長法を開発し、高い生産性で低コストの方法を用いてこれらのデバイスを製造することである。
本発明は、様々な実施形態において、巨視的ならびに微視的な組成均一性を有する高品質で、緻密で、良好に接着するIBIIIAVIA族化合物薄膜を作るための低コスト堆積技術を有利に提供する。
本発明は、重要な製造性および歩留りの問題、たとえば微視的組成の制御および基板への半導体吸収膜の接着に対処することにより、先行技術の欠点を克服する。また、本発明は薄膜太陽電池の低コスト製造も可能とする。
Claims (45)
- 基材上にIBIIIAVIA族半導体層を成長させる方法であって、
基材上にIB族材料の膜および少なくとも1つのIIIA族材料の層を堆積する工程と、
IB族材料の膜および少なくとも1つのIIIA族材料の層を混合して混合層を形成する工程と、
混合層上にIIIA族材料の副層およびIB族材料の副層の少なくとも1つを含む金属膜を形成する工程と
を含む方法。 - 混合層上に金属膜を形成する工程はIIIA族材料の副層として第1のIIIA族材料の層および別のIIIA族材料の層を形成する工程を含む請求項1記載の方法。
- 混合工程はIB族材料の膜および少なくとも1つのIIIA族材料の層を摂氏50〜350度の範囲の温度に加熱する工程を含む請求項1記載の方法。
- 加熱工程を2〜600秒の時間実施し、混合層を全体にわたって実質的に合金化し、それにより実質的に均一な微視的組成を達成する請求項3記載の方法。
- 少なくとも1つのIIIA族材料の層は混合層におけるボール化現象を実質的に防止する厚さを有する請求項1記載の方法。
- 混合層におけるIB族材料対IIIA族材料のモル比が1.0より大きい請求項5記載の方法。
- さらに、形成工程の後に混合層および金属膜をアニーリングしてアニール層を作る工程を含む請求項1記載の方法。
- アニーリング工程を摂氏50〜350度の温度で実施する請求項7記載の方法。
- さらに、堆積、混合、形成、およびアニーリングの工程を少なくとも1回繰り返して前駆体層を形成する請求項7記載の方法。
- さらに、前駆体層をVIA族材料と反応させてIBIIIAVIA族半導体層を成長させる工程を含む請求項9記載の方法
- さらに、アニール層をVIA族材料と反応させてIBIIIAVIA族半導体層を成長させる工程を含む請求項7記載の方法。
- さらに、混合層および金属膜をVIA族材料と反応させてIBIIIAVIA族半導体層を成長させる工程を含む請求項1記載の方法。
- 堆積および形成の工程をおのおの電着を用いて実施し、VIA族材料はセレンおよび硫黄の少なくとも1つを含む請求項12記載の方法。
- 堆積および形成の工程をおのおの電着を用いて実施する請求項1記載の方法。
- 基材上にCu(In,Ga)(Se,S)2半導体層を成長させる方法であって、
基材上に銅の膜ならびにインジウムの層およびガリウムの層の少なくとも1つを堆積する工程と、
銅の膜ならびにインジウムの層およびガリウムの層の少なくとも1つを混合して混合層を形成する工程と、
混合層上にインジウム副層、ガリウム副層および銅副層の少なくとも1つを含む金属膜を形成する工程と
を含む方法。 - 混合工程は銅の膜ならびにインジウムの層およびガリウムの層の少なくとも1つを摂氏50〜350度の範囲の温度に加熱する工程を含む請求項15記載の方法。
- 加熱工程を2〜600秒の時間実施し、混合層を全体にわたって実質的に合金化し、それにより実質的に均一な微視的組成を達成する請求項16記載の方法。
- 堆積工程は基材上に銅の膜ならびにインジウムの層およびガリウムの層の両方を堆積し、混合工程は銅の膜、インジウムの層およびガリウムの層を混合して混合層を形成する請求項15記載の方法。
- 金属膜はインジウム副層およびガリウム副層および銅副層を含む請求項15記載の方法。
- 混合層における銅対インジウム+ガリウムのモル比が1.0より大きい請求項17記載の方法。
- 金属膜はインジウム副層およびガリウム副層および銅副層を含む請求項18記載の方法。
- さらに、混合層および金属膜を硫黄およびセレンの少なくとも1つと反応させてCu(In,Ga)(Se,S)2半導体層を成長させる工程を含む請求項15記載の方法。
- さらに、混合層および金属膜を硫黄およびセレンの少なくとも1つと反応させてCu(In,Ga)(Se,S)2半導体層を成長させる工程を含む請求項21記載の方法。
- 堆積工程は基材上に銅の膜およびインジウムの層を堆積する請求項15記載の方法。
- 混合層における銅対インジウムのモル比が1.22以上である請求項24記載の方法。
- 金属膜はガリウム副層を含む請求項24記載の方法。
- さらに、混合層および金属膜を硫黄およびセレンの少なくとも1つと反応させてCu(In,Ga)(Se,S)2半導体層を成長させる工程を含む請求項26記載の方法。
- 堆積工程は基材上に銅の膜およびガリウムの層を堆積する請求項15記載の方法。
- 混合層における銅対ガリウムのモル比が1以上である請求項28記載の方法。
- 金属膜がインジウム副層を含む請求項28記載の方法。
- さらに、混合層および金属膜を硫黄およびセレンの少なくとも1つと反応させてCu(In,Ga)(Se,S)2半導体層を成長させる工程を含む請求項30記載の方法。
- 金属膜は銅副層およびガリウム副層を含む請求項24記載の方法。
- 混合層における銅対インジウムのモル比が1.22であり、金属膜における銅対ガリウムのモル比が0.5である請求項32記載の方法。
- さらに、混合層および金属膜を硫黄およびセレンの少なくとも1つと反応させてCu(In,Ga)(Se,S)2半導体層を成長させる工程を含む請求項33記載の方法。
- 堆積および形成の工程をおのおの電着を用いて実施する請求項15記載の方法。
- 銅の膜、インジウムの層およびガリウム副層を電着する請求項26記載の方法。
- 銅の膜、ガリウムの層およびインジウム副層を電着する請求項30記載の方法。
- 堆積および形成の工程をおのおの電着を用いて実施する請求項17記載の方法。
- 基材上にCu(In,Ga)(S,Se)2半導体層を成長させる方法であって、
基材上に銅を含む実質的に金属の前駆体膜(金属の前駆体膜は荒い表面および微視的な組成不均一性を有する)を形成する工程と、
インジウムおよびガリウムの少なくとも1つを実質的に金属の前駆体膜上に電着してスタックを形成し、それにより荒い表面を実質的に減少させ、スタックの微視的な組成均一性を与える工程と
を含む方法。 - 実質的に金属の前駆体膜はさらにインジウムおよびガリウムの少なくとも1つを含む請求項39記載の方法。
- 電着工程を平坦化添加剤を含む電解液を用いて実施する請求項39記載の方法。
- 実質的に金属の前駆体膜はさらにガリウムを含み、電着工程はインジウムを実質的に金属の前駆体膜上に付着させてスタックを形成する請求項40記載の方法。
- 実質的に金属の前駆体膜はさらにガリウムおよびインジウムを含み、電着工程はインジウムを実質的に金属の前駆体膜上に付着させてスタックを形成する請求項40記載の方法。
- さらに、スタックをセレンおよび硫黄の少なくとも1つと反応させてCu(In,Ga)(S,Se)2半導体層を成長させる工程を含む請求項39記載の方法。
- さらに、スタックをセレンおよび硫黄の少なくとも1つと反応させてCu(In,Ga)(S,Se)2半導体層を成長させる工程を含む請求項42記載の方法。
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US7374963B2 (en) | 2008-05-20 |
US20080190761A1 (en) | 2008-08-14 |
JP5259178B2 (ja) | 2013-08-07 |
WO2005089330A2 (en) | 2005-09-29 |
US8192594B2 (en) | 2012-06-05 |
WO2005089330A3 (en) | 2007-05-03 |
CN101894881A (zh) | 2010-11-24 |
EP1749309A2 (en) | 2007-02-07 |
CN101027749A (zh) | 2007-08-29 |
US20050202589A1 (en) | 2005-09-15 |
KR101115484B1 (ko) | 2012-02-27 |
CN100573812C (zh) | 2009-12-23 |
KR20070097297A (ko) | 2007-10-04 |
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