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Mid-infrared photoluminescence revealing internal quantum efficiency enhancement of type-I and type-II InAs core/shell nanowires
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Chen, Xiren, Alradhi, H., Jin, Zh. M., Zhu, Liangqing, Sanchez, A. M., Ma, Shufang, Zhuang, Qiandong and Shao, Jun (2022) Mid-infrared photoluminescence revealing internal quantum efficiency enhancement of type-I and type-II InAs core/shell nanowires. Optics Letters, 47 (19). pp. 5208-5211. doi:10.1364/OL.473154 ISSN 0146-9592.
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Official URL: http://dx.doi.org/10.1364/OL.473154
Abstract
Internal quantum efficiency (IQE) is an important figure of merit for photoelectric applications. While the InAs core/shell (c/s) nanowire (NW) is a promising solution for efficient quantum emission, the relationship between the IQE and shell coating remains unclear. This Letter reports mid-infrared PL measurements on InAs/InGaAs, InAs/AlSb, and InAs/GaSb c/s NWs, together with bare InAs NWs as a reference. Analyses show that the IQE is depressed by a shell coating at 9 K but gets improved by up to approximately 50% for the InGaAs shell coating at 40 –140 K and up to approximately 20% beyond 110 K for the AlSb shell. The effect is ascribed not only to the crystal quality but more importantly to the radial band alignment. The result indicates the high-temperature IQE improvement of the type-I and type-II c/s NWs and the appropriateness of the mid-infrared PL analyses for narrow-gap NW evaluation.
| Item Type: | Journal Article | |||||||||||||||||||||
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| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Nanowires , Photoluminescence, Semiconductors -- Effect of radiation on , Optical detectors | |||||||||||||||||||||
| Journal or Publication Title: | Optics Letters | |||||||||||||||||||||
| Publisher: | Optical Society of America | |||||||||||||||||||||
| ISSN: | 0146-9592 | |||||||||||||||||||||
| Official Date: | 1 October 2022 | |||||||||||||||||||||
| Dates: |
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| Volume: | 47 | |||||||||||||||||||||
| Number: | 19 | |||||||||||||||||||||
| Page Range: | pp. 5208-5211 | |||||||||||||||||||||
| DOI: | 10.1364/OL.473154 | |||||||||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||
| Reuse Statement (publisher, data, author rights): | © 2022 Optical Publishing Group. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. | |||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||
| Copyright Holders: | Optica Publishing Group | |||||||||||||||||||||
| Date of first compliant deposit: | 3 November 2022 | |||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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