JP2014195118A - 多接合ソーラーセル及びその形成方法 - Google Patents
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- H01L31/184—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof the active layers comprising only AIIIBV compounds, e.g. GaAs, InP
- H01L31/1852—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof the active layers comprising only AIIIBV compounds, e.g. GaAs, InP comprising a growth substrate not being an AIIIBV compound
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Abstract
【解決手段】上部サブセル、中間サブセル及び下部サブセルを含む多接合ソーラーセルを製造する方法であって、半導体材料のエピタキシャル成長のために第1基板を準備し、第1バンドギャップを有する第1ソーラーサブセルを基板上に形成し、第1バンドギャップより小さい第2バンドギャップを有する第2ソーラーサブセルを第1ソーラーサブセルの上に形成し、貫通転位を防止するために第2サブセルの上にバリア層を形成し、第2バンドギャップより大きな第3バンドギャップを有するグレーディング中間層をバリア層の上に形成し、第2バンドギャップより小さい第4バンドギャップを有する第3ソーラーサブセルであって、第2サブセルに対して格子不整合している第3サブセルをグレーディング中間層の上に形成するステップを含む方法が、開示される。
【選択図】図4
Description
102:核生成層
103:バッファ層
104:エッチング停止層
105:コンタクト層
106:窓層
107:n+エミッタ層
108:pベース層
109:BSF層
110:p型及びn型層(トンネルダイオード層)
111:窓層
112:n+エミッタ層
113:pベース層
114:BSF層
115:p++/n++トンネルダイオード
116a:バリア層
116:グレーディング中間層(メタモルフィックバッファ層)
116b:バリア層
117:窓層
118:n+エミッタ層
119:pベース層
120:BSF層
121:p+コンタクト層
122:金属コンタクト層
123:接着剤層
124:代用基板
501:グリッド線
502:相互接続バス線
503:コンタクトパッド
510:メサ
Claims (22)
- 上部サブセル、中間サブセル及び下部サブセルを含む多接合ソーラーセルを形成する方法であって、
半導体材料のエピタキシャル成長のために第1基板を準備するステップと、
第1バンドギャップを有する第1ソーラーサブセルを前記基板の上に形成するステップと、
前記第1バンドギャップより小さい第2バンドギャップを有する第2ソーラーサブセルを前記第1ソーラーサブセルの上に形成するステップと、
前記第2サブセルの上にバリア層を形成するステップと、
前記第2バンドギャップより大きい第3バンドギャップを有するグレーディング中間層を前記バリア層の上に形成するステップと、
前記第2バンドギャップより小さい第4バンドギャップを有する第3ソーラーサブセルであって、前記第2サブセルに対して格子不整合している第3サブセルを、前記グレーディング中間層の上に形成するステップと、
を含むことを特徴とする方法。 - 前記バリア層が、前記グレーディング中間層以上のバンドギャップエネルギーを有するAs、P、N又はSbをベースにしたIII-V化合物半導体により構成される、請求項1に記載の方法。
- 前記第3ソーラーサブセルを形成する前に前記グレーディング中間層の上に第2バリア層を形成するステップを更に含む、請求項1に記載の方法。
- 前記第2バリア層が、前記グレーディング中間層以上のバンドギャップエネルギーを有するAs、P、N又はSbをベースにしたIII-V化合物半導体により構成される、請求項3に記載の方法。
- 前記第1基板が、ゲルマニウム及びGaAsを含むグループから選択される、請求項1に記載の方法。
- 前記第1ソーラーサブセルがInGa(Al)Pエミッタ領域及びInGa(Al)Pベース領域により構成される、請求項1に記載の方法。
- 前記第2のソーラーセルが、GaInP、GaInAs、GaAsSb又はGaInAsNエミッタ領域と、GaInAs、GaAsSb又はGaInAsNベース領域とにより構成される、請求項6に記載の方法。
- 前記グレーディング中間層が、前記第2ソーラーセル以上であって前記第3ソーラーセル以下の平面内格子パラメータを有すること、及び、前記第2ソーラーセルより大きいバンドギャップエネルギーを有すること、という制約を受けるAs、P、N又はSbをベースにしたIII-V化合物半導体により構成される、請求項1に記載の方法。
- 前記第2ソーラーサブセルが、InGaPエミッタ領域及びGaAsベース領域により構成される、請求項6に記載の方法。
- 前記グレーディング中間層がInGaAlAsにより構成される、請求項1に記載の方法。
- 前記グレーディング中間層が単調に変化する格子定数を有する9段の層により構成される、請求項8に記載の方法。
- 前記第3ソーラーサブセルの上にコンタクト層を堆積させ、前記第3ソーラーサブセルと該コンタクト層との間に電気的コンタクトを確立するステップ、をさらに含む、請求項1に記載の方法。
- 前記コンタクト層の上に代用第2基板を取り付け、前記第1基板を除去するステップを更に含む、請求項10に記載の方法。
- グリッド内に前記コンタクト層をパターニングするステップと、
前記代用第2基板の上にメサ構造を形成するために、前記ソーラーセルの周りに溝をエッチングするステップと、
をさらに含む、請求項1に記載の方法。 - 基板と、
該基板の上における第1バンドギャップを有する第1ソーラーサブセルと、
前記第1サブセルの上に配置され、前記第1バンドギャップより小さい第2バンドギャップを有する第2ソーラーサブセルと、
貫通転位の伝播を低減させるために前記第2サブセルの上に配置されたバリア層と、
前記バリア層の上に配置され、前記第2バンドギャップより大きい第3バンドギャップを有するグレーディング中間層と、
該グレーディング中間層の上に配置され、前記中間サブセルに対して格子不整合しており、前記第2バンドギャップより小さい第4バンドギャップを有する第3のソーラーサブセルと、
を具備することを特徴とする多接合ソーラーセル。 - 前記バリア層が、前記グレーディング中間層以上のバンドギャップエネルギーを有するAs、P、N又はSbをベースにしたIII-V化合物半導体により構成される、請求項15に記載のソーラーセル。
- 前記グレーディング中間層と前記第3サブセルとの間に配置された第2バリア層を更に具備する、請求項15に記載のソーラーセル。
- 前記第2バリア層が、前記グレーディング中間層以上のバンドギャップエネルギーを有するAs、P、N又はSbをベースにしたIII-V化合物半導体により構成される、請求項15に記載のソーラーセル。
- 前記基板が、ゲルマニウム及びGaAsを含むグループから選択される、請求項15に記載のソーラーセル。
- 前記第1ソーラーサブセルがInGa(Al)Pにより構成される、請求項15に記載のソーラーセル。
- 前記第2ソーラーサブセルが、GaInP、GaInAs、GaAsSb又はGaInAsNエミッタ領域と、GaInAs、GaAsSb又はGaInAsNベース領域と、により構成される、請求項15に記載のソーラーセル。
- 前記第3ソーラーサブセルがInGaAsにより構成される、請求項15に記載のソーラーセル。
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TWI488314B (zh) | 2015-06-11 |
US20090078309A1 (en) | 2009-03-26 |
CN101399298B (zh) | 2012-06-27 |
JP2009076920A (ja) | 2009-04-09 |
CN101399298A (zh) | 2009-04-01 |
TW200915588A (en) | 2009-04-01 |
DE102008034711A1 (de) | 2009-04-16 |
JP6194283B2 (ja) | 2017-09-06 |
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