JP5291633B2 - シリコン系薄膜光電変換装置およびその製造方法 - Google Patents
シリコン系薄膜光電変換装置およびその製造方法 Download PDFInfo
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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
- H01L31/0248—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 characterised by their semiconductor bodies
- H01L31/036—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 characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes
- H01L31/0368—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 characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including polycrystalline semiconductors
- H01L31/03682—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 characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including polycrystalline semiconductors including only elements of Group IV of the Periodic System
- H01L31/03685—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 characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including polycrystalline semiconductors including only elements of Group IV of the Periodic System including microcrystalline silicon, uc-Si
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- H01L31/0236—Special surface textures
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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
- H01L31/06—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 characterised by at least one potential-jump barrier or surface barrier
- H01L31/075—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 characterised by at least one potential-jump barrier or surface barrier the potential barriers being only of the PIN type
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Description
2 透明電極
3 結晶質光電変換ユニット
31 1導電型半導体層
321 i型結晶質シリコン系介在層
322 結晶質シリコン系光電変換層
33 逆導電型半導体層
4 裏面電極
41 透明導電酸化物層
42 金属層
5 シリコン系薄膜光電変換装置。
本発明と対比するための比較例1として、図1中のi型結晶質シリコン系介在層321が省略された薄膜光電変換装置が作製された。
本発明の実施例1においては、図1に対応する光電変換装置5が作製された。すなわち、本実施例1の光電変換装置は、比較例1に比べて、厚さ2nmのi型結晶質シリコン系介在層321が挿入されていることのみにおいて異なっている。
本発明の実施例2による光電変換装置は、実施例1に比べて、介在層321の厚みが5nmに増大されたことのみにおいて異なっていた。
本発明の実施例3による光電変換装置は、実施例1に比べて、介在層321の形成において二酸化炭素ガスの代わりにメタンを使用して厚さ2nmのi型結晶質シリコンカーバイド(μc−SiC)層が堆積されたことのみにおいて異なっていた。
比較例2における光電変換装置は、実施例1に比べて、介在層321が特許文献1の場合とほぼ同様の方法によって厚さ2.7nmの実質的にi型の非晶質シリコン(a−Si)薄膜として堆積されたことのみにおいて異なっていた。
比較例3における光電変換装置は、実施例3に比べて、介在層321が特許文献2に記載の実施例2とほぼ同様の方法によって厚さ3nmのp型μc−SiC層として堆積されたことのみにおいて異なっていた。
表1にまとめられた結果から分かるように、実施例1〜3のいずれにおいても、比較例1〜3を上回る変換効率の薄膜光電変換装置を得ることができている。すなわち、いずれの実施例においても、いずれも比較例よりもVocとJscの値が向上し、結果として変換効率Eff.が向上している。この理由としては、i型結晶質シリコン系介在層321の存在によって、p型層31からp型不純物がi型結晶質光電変換層322へ拡散することを抑制するバリア効果と、結晶質光電変換層322堆積時のプラズマ中の水素原子がp型層31へ悪影響を与ることを防止する効果が得られているからであると推測される。また、i型結晶質シリコン系介在層321として、例えば実施例のように25%もの高いヘイズ率、すなわち大きな表面凹凸を有する透明電極2を用いた場合においても、透明電極2の表面形状を反映したp/i層界面を良好に被覆することができているものと推定される。そのため、介在層に引き続き形成されるi型結晶質光電変換層322の核発生が、i型結晶質シリコン系介在層321によって制御され、p/i層界面のi型結晶質光電変換層322側の成長初期膜質が高品質化し、膜中欠陥によるキャリア再結合が抑制されるために、変換効率が向上したものと推定される。また、これに加えて、i型結晶質シリコン系介在層321が、結晶質かつi型層であるために、当該介在層による光吸収が小さく、i型結晶質光電変換層322の光入射側に位置していても、i型結晶質光電変換層における発電電流を低下させることが無いため、Jscの向上に繋がったものと考えられる。
Claims (6)
- 光入射側から、透光性基板、および前記透光性基板上に順次積層された透明電極ならびに結晶質光電変換ユニット、を含むシリコン系薄膜光電変換装置であって、
前記結晶質光電変換ユニットは、光入射側から順次積層された1導電型半導体層、結晶質シリコン系光電変換層、および逆導電型半導体層を含み、
前記結晶質光電変換ユニットの前記1導電型半導体層と前記光電変換層との間には、その光電変換層とは異なる材質の実質的にi型の結晶質シリコン系介在層をさらに含み、かつ、前記光電変換層は前記介在層と直に接しており、
前記結晶質光電変換ユニットの光入射側に配置された透明電極は、表面凹凸を有し、ヘイズ率が20〜40%であることを特徴とする、シリコン系薄膜光電変換装置。 - 前記介在層の厚さが0.1〜10nmの範囲内にあることを特徴とする請求の範囲1に記載のシリコン系薄膜光電変換装置。
- 前記介在層は、結晶質シリコンオキサイドを含むことを特徴とする請求の範囲1または2に記載のシリコン系薄膜光電変換装置。
- 前記介在層は、結晶質シリコンカーバイド、および結晶質シリコンナイトライドのいずれかを含むことを特徴とする請求の範囲1から3のいずれかに記載のシリコン系薄膜光電変換装置。
- 前記結晶質光電変換ユニットの光入射側において、順次積層された1導電型半導体層、非晶質シリコン系光電変換層、および逆導電型半導体層を含む非晶質光電変換ユニットをさらに含むことを特徴とする請求の範囲1から4のいずれかに記載のシリコン系薄膜光電変換装置。
- 請求項1〜6のいずれか1項に記載のシリコン系薄膜光電変換装置を製造する方法であって、
前記透光性基板上に、前記透明電極および結晶質光電変換ユニットがこの順に形成され、
前記結晶質光電変換ユニットは、前記透光性基板側から、前記1導電型半導体層、前記結晶質シリコン系介在層、前記結晶質シリコン系光電変換層、および前記逆導電型半導体層がこの順にプラズマCVD法により形成される、シリコン系薄膜光電変換装置の製造方法。
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US (1) | US20100275996A1 (ja) |
EP (1) | EP2216826A4 (ja) |
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US7955890B2 (en) * | 2008-06-24 | 2011-06-07 | Applied Materials, Inc. | Methods for forming an amorphous silicon film in display devices |
FR2955702B1 (fr) * | 2010-01-27 | 2012-01-27 | Commissariat Energie Atomique | Cellule photovoltaique comprenant un film mince de passivation en oxyde cristallin de silicium et procede de realisation |
TW201145541A (en) * | 2010-04-02 | 2011-12-16 | Ulvac Inc | Photoelectric conversion device and photoelectric conversion device manufacturing method |
DE102010021172B4 (de) | 2010-05-21 | 2013-04-18 | Siemens Aktiengesellschaft | Strahlenwandler mit einer direkt konvertierenden Halbleiterschicht und Verfahren zur Herstellung eines solchen Strahlenwandlers |
KR101292061B1 (ko) * | 2010-12-21 | 2013-08-01 | 엘지전자 주식회사 | 박막 태양전지 |
WO2014002266A1 (ja) * | 2012-06-29 | 2014-01-03 | 三洋電機株式会社 | 太陽電池 |
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- 2008-11-21 EP EP08854520.7A patent/EP2216826A4/en not_active Withdrawn
- 2008-11-21 US US12/743,811 patent/US20100275996A1/en not_active Abandoned
- 2008-11-21 WO PCT/JP2008/071208 patent/WO2009069544A1/ja active Application Filing
- 2008-11-21 JP JP2009543772A patent/JP5291633B2/ja not_active Expired - Fee Related
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US20100275996A1 (en) | 2010-11-04 |
WO2009069544A1 (ja) | 2009-06-04 |
JPWO2009069544A1 (ja) | 2011-04-14 |
EP2216826A1 (en) | 2010-08-11 |
EP2216826A4 (en) | 2016-10-12 |
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