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| Presentation | 2020-11-26 10:05 Internal and External Quantum Efficiency in InGaN Quantum Wells Estimated by Simultaneous Photoacoustic and Photoluminescence Method and Integrating-Sphere Method Keito Mori, Yuchi Takahashi, Shigeta Sakai, Yuya Morimoto, Atsushi A. Yamaguchi (KIT), Susumu Kusanagi, Yuya Kanitani, Yoshihiro Kudo, Shigetaka Tomiya (Sony)  ED2020-1 CPM2020-22 LQE2020-52 Link to ES Tech. Rep. Archives: ED2020-1 CPM2020-22 LQE2020-52 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In our previous reports, we proposed photoacoustic (PA) and photoluminescence (PL) simultaneous measurements as a method to accurately estimate the internal quantum efficiency (IQE) in InGaN quantum wells (QWs). To check the accuracy of the measurement, it is necessary to estimate the effects of factors that may lead to uncertainty, such as reabsorption of QW emission and absorption of excitation light in the GaN substrate. In this study, we have measured IQE and external quantum efficiency (EQE) values by the PA / PL method and the integrating sphere method, respectively, for various InGaN-QW samples on a GaN substrate or a sapphire substrate, and the estimated two values have been compared. It is found, in the measurements, that the excitation light absorption in the GaN substrate affects the PA signal in QWs on GaN substrates, and we have corrected the data by considering the effects. Comparing the estimated IQE and EQE values, the IQE values are larger than the EQE values for all the samples, and the light extraction efficiency obtained from the ratio of IQE and EQE is correlated with the morphology of the sample surface. From these results, it is suggested that accurate IQE values is estimated by this method. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | InGaN quantum well / radiative recombination / non-radiative recombination / internal quantum efficiency / photoacoustic / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 256, LQE2020-52, pp. 1-4, Nov. 2020. | |
| Paper # | LQE2020-52 | |
| Date of Issue | 2020-11-19 (ED, CPM, LQE) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | ED2020-1 CPM2020-22 LQE2020-52 Link to ES Tech. Rep. Archives: ED2020-1 CPM2020-22 LQE2020-52 |
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| Conference Information | |
| Committee | LQE CPM ED |
| Conference Date | 2020-11-26 - 2020-11-27 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | LQE |
| Conference Code | 2020-11-LQE-CPM-ED |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Internal and External Quantum Efficiency in InGaN Quantum Wells Estimated by Simultaneous Photoacoustic and Photoluminescence Method and Integrating-Sphere Method |
| Sub Title (in English) | |
| Keyword(1) | InGaN quantum well |
| Keyword(2) | radiative recombination |
| Keyword(3) | non-radiative recombination |
| Keyword(4) | internal quantum efficiency |
| Keyword(5) | photoacoustic |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Keito Mori |
| 1st Author's Affiliation | Kanazawa Institute of Technology (KIT) |
| 2nd Author's Name | Yuchi Takahashi |
| 2nd Author's Affiliation | Kanazawa Institute of Technology (KIT) |
| 3rd Author's Name | Shigeta Sakai |
| 3rd Author's Affiliation | Kanazawa Institute of Technology (KIT) |
| 4th Author's Name | Yuya Morimoto |
| 4th Author's Affiliation | Kanazawa Institute of Technology (KIT) |
| 5th Author's Name | Atsushi A. Yamaguchi |
| 5th Author's Affiliation | Kanazawa Institute of Technology (KIT) |
| 6th Author's Name | Susumu Kusanagi |
| 6th Author's Affiliation | Sony Corporation (Sony) |
| 7th Author's Name | Yuya Kanitani |
| 7th Author's Affiliation | Sony Corporation (Sony) |
| 8th Author's Name | Yoshihiro Kudo |
| 8th Author's Affiliation | Sony Corporation (Sony) |
| 9th Author's Name | Shigetaka Tomiya |
| 9th Author's Affiliation | Sony Corporation (Sony) |
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| Speaker | Author-1 |
| Date Time | 2020-11-26 10:05:00 |
| Presentation Time | 20 minutes |
| Registration for | LQE |
| Paper # | ED2020-1, CPM2020-22, LQE2020-52 |
| Volume (vol) | vol.120 |
| Number (no) | no.254(ED), no.255(CPM), no.256(LQE) |
| Page | pp.1-4 |
| #Pages | 4 |
| Date of Issue | 2020-11-19 (ED, CPM, LQE) |
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