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| Presentation | 2020-12-25 13:20 Study on exciton and carrier dynamics at CuPc/MoO3 interface by using time-resolved second harmonic generation technique Keito Shimosawa, Dai Taguchi, Takaaki Manaka (Tokyo Tech.)  OME2020-9 Link to ES Tech. Rep. Archives: OME2020-9 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Organic semiconductors are attracting much attention as a photo detector, solar cell, and other optoelectronic devices. In these devices, under photo excitation, excitons are created in an organic semiconductor, followed by exciton diffusion, carrier separation, carrier transport process, successively. It is important to evaluate these fundamental processes that are induced in a time range from ps to ns. However, conventional electrical measurement, e.g., time-of-flight (TOF), is not available to record these very fast carrier motions. The authors have been developing optical second-harmonic generation (SHG) measurement that is capable of probing electronic carrier motion in organic materials and devices. By coupling optical pump-probe measurement technique with SHG, we are able to record carrier motion in ps time resolution. In this report, time-resolved SHG measurement of photocarrier process at copper phthalocyanine (CuPc)/MoO3 interface, in conjunction with conventional surface potential measurement is described. Results showed that the SHG modulation decreased sharply due to the pump light irradiation, and then increased at a very fast of 9 ± 4 ps. From this, the authors conclude that the increase of the SHG signal is due to the electric-field in CuPc layer. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | optical second-harmonic generation / electric-field-induced optical second-harmonic generation / phthalocyanine / photocarrier process / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 307, OME2020-9, pp. 7-12, Dec. 2020. | |
| Paper # | OME2020-9 | |
| Date of Issue | 2020-12-18 (OME) | |
| 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 | OME2020-9 Link to ES Tech. Rep. Archives: OME2020-9 |
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| Conference Information | |
| Committee | OME |
| Conference Date | 2020-12-25 - 2020-12-26 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Okinawaken Seinen Kaikan |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | bio-technology, surface and interfacial phenomena, measurement and observation, electronics, and other researches relating these |
| Paper Information | |
| Registration To | OME |
| Conference Code | 2020-12-OME |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on exciton and carrier dynamics at CuPc/MoO3 interface by using time-resolved second harmonic generation technique |
| Sub Title (in English) | |
| Keyword(1) | optical second-harmonic generation |
| Keyword(2) | electric-field-induced optical second-harmonic generation |
| Keyword(3) | phthalocyanine |
| Keyword(4) | photocarrier process |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Keito Shimosawa |
| 1st Author's Affiliation | Tokyo Institute of Technology (Tokyo Tech.) |
| 2nd Author's Name | Dai Taguchi |
| 2nd Author's Affiliation | Tokyo Institute of Technology (Tokyo Tech.) |
| 3rd Author's Name | Takaaki Manaka |
| 3rd Author's Affiliation | Tokyo Institute of Technology (Tokyo Tech.) |
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| Speaker | Author-1 |
| Date Time | 2020-12-25 13:20:00 |
| Presentation Time | 20 minutes |
| Registration for | OME |
| Paper # | OME2020-9 |
| Volume (vol) | vol.120 |
| Number (no) | no.307 |
| Page | pp.7-12 |
| #Pages | 6 |
| Date of Issue | 2020-12-18 (OME) |
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