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https://hdl.handle.net/20.500.14094/90006084
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2024-04-27
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90006084 (fulltext)
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90006084
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open access
出版タイプ
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タイトル
Adiabatic two-step photoexcitation effects in intermediate-band solar cells with quantum dot-in-well structure
著者
Asahi, Shigeo ; Kaizu, Toshiyuki ; Kita, Takashi
著者ID
A1001
研究者ID
1000060782729
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=f6b9bd62c178c09e520e17560c007669
著者名
Asahi, Shigeo
朝日, 重雄
アサヒ, シゲオ
所属機関名
工学研究科
著者ID
A0308
研究者ID
1000000425571
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=57e69451bf6c7707520e17560c007669
著者名
Kaizu, Toshiyuki
海津, 利行
カイヅ, トシユキ
所属機関名
研究基盤センター
著者ID
A0491
研究者ID
1000010221186
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=7853123c7c766d89520e17560c007669
著者名
Kita, Takashi
喜多, 隆
キタ, タカシ
所属機関名
工学研究科
収録物名
Scientific Reports
巻(号)
9
ページ
7859-7859
出版者
Nature Research
刊行日
2019-05-27
公開日
2019-06-18
抄録
We studied the dynamics of electrons generated by two-step photoexcitation in an intermediate-band solar cell (IBSC) comprising InAs/GaAs/Al0.3Ga0.7As dot-in-well (DWELL) structure using time-resolved photocurrent (TRPC) measurement. The examined IBSC exhibited considerably slower photocurrent decay than a conventional InAs/GaAs quantum dot IBSC, which is due to the extraordinarily long-lived electrons in the DWELL. In order to retrieve the electron lifetime from the decay profile, we developed a model reproducing the observed decay and performed parameter fitting. The fitting results indicate that the electron lifetime in the DWELL is approximately 30 μs. In the two-colour excitation TRPC measurement, we found that an additional infrared (IR) light accelerates the photocurrent decay while the photocurrent increases by approximately 3%, because the additional IR light causes two-step photoexcitation of electrons in the DWELLs towards the conduction band. Furthermore, we demonstrated that the open-circuit voltage increases with increasing of the contribution of the second IR excitation process.
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工学研究科
学術雑誌論文
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© The Author(s) 2019.
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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資源タイプ
journal article
言語
English (英語)
eISSN
2045-2322
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DOI
https://doi.org/10.1038/s41598-019-44335-8
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