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Paper Abstract and Keywords
Presentation 2009-10-23 10:00
Response properties of organic white light-emitting diodes using red fluorescent and blue phosphorescent materials
Noriyoshi Takahota, Hirotake Kajii, Yutaka Ohmori (Osaka Univ.) OME2009-40
Abstract (in Japanese) (See Japanese page) 
(in English) Organic white light-emitting diodes using red fluorescent and blue phosphorescent materials as emissive layers were fabricated and investigated. The maximum luminance of 16000 cd/m2 was obtained in this device. Response properties of white emission, blue phosphorescence and red fluorescence which were included in white emission were measured by applying pulsed voltages. Rise time in white emission was a few ten $\mu$s at low voltage region. At high voltage region, it was about 1$\mu$s. On the other hand, decay time was approximately 1$\mu$s. Response properties of white emission were almost identical to response properties of blue phosphorescence. Next, in order to investigate blue phosphorescence and red fluorescence, blue phosphorescent and red fluorescent devices were fabricated and measured response properties. For a blue phosphorescent device, rise time was affected by RC constant and phosphorescent recombination time at low and high voltage region, respectively. For a red fluorescent device, rise time and decay time were controlled by RC constant.
Keyword (in Japanese) (See Japanese page) 
(in English) organic light-emitting diodes / fluorescence / phosphorescence / response properties / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 251, OME2009-40, pp. 1-5, Oct. 2009.
Paper # OME2009-40 
Date of Issue 2009-10-16 (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 OME2009-40

Conference Information
Committee OME  
Conference Date 2009-10-23 - 2009-10-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Chuo-Denki-Club, ROOM 213 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Organic Materials and Others related to OME activity 
Paper Information
Registration To OME 
Conference Code 2009-10-OME 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Response properties of organic white light-emitting diodes using red fluorescent and blue phosphorescent materials 
Sub Title (in English)  
Keyword(1) organic light-emitting diodes  
Keyword(2) fluorescence  
Keyword(3) phosphorescence  
Keyword(4) response properties  
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1st Author's Name Noriyoshi Takahota  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Hirotake Kajii  
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 2009-10-23 10:00:00 
Presentation Time 25 minutes 
Registration for OME 
Paper # OME2009-40 
Volume (vol) vol.109 
Number (no) no.251 
Page pp.1-5 
#Pages 5 
Date of Issue 2009-10-16 (OME) 

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