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| Presentation | 2015-05-29 13:30 Degradation analysis of near-infrared phosphorescence organic light-emitting diodes with platinum-complex emissive layer Hirotake Kajii, Tatsuya Ueda, Yutaka Ohmori (Osaka Univ.)  OME2015-18 Link to ES Tech. Rep. Archives: OME2015-18 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In order to improve the device lifetime of the organic light-emitting diodes (OLEDs), it is necessary to figure out the degradation mechanism. The properties of the undoped and Pt tetraphenyltetrabenzoporphyrin (Pt(tpbp)) doped tris(8-hydroxyquinolinato)aluminum (Alq3)-based OLEDs are investigated. An Alq3 based OLED with an estimated lifetime of approximately 200 hours (time to reach 50 % of initial intensity) at 5,000 cd/m2 is obtained. On the other hand, at 200h, the output of a near-infrared device with Pt(tpbp) doped in Alq3 reaches 80 % of initial intensity. That is, the operating stability is improved for the device with Pt(tpbp) doped in Alq3. For devices with undoped Alq3, Alq3 layer acts as both the emissive and electron transport layers. Hole injection into hole transport layer gets worse after degradation. On the other hand, Pt(tpbp) acts as the carrier trap of Alq3 layer. Alq3 layer mainly acts as the electron transport layers. Photoluminescence (PL) intensity of Pt(tpbp) after degradation reaches approximately 80 % of the initial PL intensity. That is, the optical degradation of Pt(tpbp) molecules results in the decrease of EL intensity. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Organic light-emitting diode / Pt complex / Near-infrared emission / Degradation analysis / Phosphorescence / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 115, no. 68, OME2015-18, pp. 1-4, May 2015. | |
| Paper # | OME2015-18 | |
| Date of Issue | 2015-05-22 (OME) | |
| ISSN | Print edition: ISSN 0913-5685 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 | OME2015-18 Link to ES Tech. Rep. Archives: OME2015-18 |
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| Conference Information | |
| Committee | OME |
| Conference Date | 2015-05-29 - 2015-05-29 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Organic Electronics Device, Biotechnolpgy, et al. |
| Paper Information | |
| Registration To | OME |
| Conference Code | 2015-05-OME |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Degradation analysis of near-infrared phosphorescence organic light-emitting diodes with platinum-complex emissive layer |
| Sub Title (in English) | |
| Keyword(1) | Organic light-emitting diode |
| Keyword(2) | Pt complex |
| Keyword(3) | Near-infrared emission |
| Keyword(4) | Degradation analysis |
| Keyword(5) | Phosphorescence |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Hirotake Kajii |
| 1st Author's Affiliation | Osaka University (Osaka Univ.) |
| 2nd Author's Name | Tatsuya Ueda |
| 2nd Author's Affiliation | Osaka University (Osaka Univ.) |
| 3rd Author's Name | Yutaka Ohmori |
| 3rd Author's Affiliation | Osaka University (Osaka Univ.) |
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| Speaker | Author-1 |
| Date Time | 2015-05-29 13:30:00 |
| Presentation Time | 25 minutes |
| Registration for | OME |
| Paper # | OME2015-18 |
| Volume (vol) | vol.115 |
| Number (no) | no.68 |
| Page | pp.1-4 |
| #Pages | 4 |
| Date of Issue | 2015-05-22 (OME) |
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