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Paper Abstract and Keywords
Presentation 2014-10-10 10:30
Study of Anisotropic Transport and Emission Characteristics in Polarized Bilayer Light-Emitting Transistor with Fluorene-Type Oriented Thin Film
Kazuya Hashimoto, Hirotake Kajii, Yutaka Ohmori (Osaka Univ.) OME2014-37 Link to ES Tech. Rep. Archives: OME2014-37
Abstract (in Japanese) (See Japanese page) 
(in English) In this study, we focus on the molecular orientation of the conjugated polymer and investigate the electrical and optical properties of the organic light-emitting transistors (OLETs) using the polarized light emission and anisotropy of carrier transport. Top-gate type OLETs based on the oriented thin film of poly(9,9-dioctylfluorene) (F8) with poly(methyl methacrylate) (PMMA) as gate dielectric are fabricated. When a current flows in a direction parallel to the oriented polymer main chain, the behaviors of characteristics of OLETs are markedly different from those in a direction perpendicular to the oriented one. Calculating the mobilities of electrons and holes from the transfer characteristics of the single layer device, the electron and hole mobilities of OLETs in which the oriented main chain is parallel to the channel length direction are approximately 4 and 8 times as large as those perpendicular (⊥) to that direction. Their polarized emissions are predominant along the oriented direction. Electron and hole mobilities of the bilayers devices are dependent on the orientation of the upper layer on which the gate dielectric is formed. External quantum efficiency and threshold voltage are independent on orientation of the organic layer.
Keyword (in Japanese) (See Japanese page) 
(in English) Organic light-emitting transistor / Polyfluorene / Top-gate / Light-emitting device / Oriented thin film / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 241, OME2014-37, pp. 1-4, Oct. 2014.
Paper # OME2014-37 
Date of Issue 2014-10-03 (OME) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 OME2014-37 Link to ES Tech. Rep. Archives: OME2014-37

Conference Information
Committee OME  
Conference Date 2014-10-10 - 2014-10-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka University Nakanoshima Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Organic devices and sensors, etc. 
Paper Information
Registration To OME 
Conference Code 2014-10-OME 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study of Anisotropic Transport and Emission Characteristics in Polarized Bilayer Light-Emitting Transistor with Fluorene-Type Oriented Thin Film 
Sub Title (in English)  
Keyword(1) Organic light-emitting transistor  
Keyword(2) Polyfluorene  
Keyword(3) Top-gate  
Keyword(4) Light-emitting device  
Keyword(5) Oriented thin film  
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Keyword(8)  
1st Author's Name Kazuya Hashimoto  
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 2014-10-10 10:30:00 
Presentation Time 25 minutes 
Registration for OME 
Paper # OME2014-37 
Volume (vol) vol.114 
Number (no) no.241 
Page pp.1-4 
#Pages
Date of Issue 2014-10-03 (OME) 


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