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| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| 1.4926569.pdf | 888.29 kB | Adobe PDF | 見る/開く |
| タイトル: | Femtosecond upconverted photocurrent spectroscopy of InAs quantum nanostructures |
| 著者: | Yamada, Yasuhiro Tex, David M. Kamiya, Itaru Kanemitsu, Yoshihiko    https://orcid.org/0000-0002-0788-131X (unconfirmed) |
| 著者名の別形: | 金光, 義彦 |
| 発行日: | 8-Jul-2015 |
| 出版者: | AIP Publishing |
| 誌名: | Applied Physics Letters |
| 巻: | 107 |
| 号: | 01 |
| 論文番号: | 013905 |
| 抄録: | The carrier upconversion dynamics in InAs quantum nanostructures are studied for intermediate-band solar-cell applications via ultrafast photoluminescence and photocurrent (PC) spectroscopy based on femtosecond excitation correlation (FEC) techniques. Strong upconverted PC-FEC signals are observed under resonant excitation of quantum well islands (QWIs), which are a few monolayer-thick InAs quantum nanostructures. The PC-FEC signal typically decays within a few hundred picoseconds at room temperature, which corresponds to the carrier lifetime in QWIs. The photoexcited electron and hole lifetimes in InAs QWIs are evaluated as functions of temperature and laser fluence. Our results provide solid evidence for electron–hole–hole Auger process, dominating the carrier upconversion in InAs QWIs at room temperature. |
| 著作権等: | Copyright 2015 AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article may be found at http://scitation.aip.org/content/aip/journal/apl/107/1/10.1063/1.4926569 |
| URI: | http://hdl.handle.net/2433/210115 |
| DOI(出版社版): | 10.1063/1.4926569 |
| 出現コレクション: | 学術雑誌掲載論文等 |
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