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Paper Abstract and Keywords
Presentation 2023-12-27 10:20
Solution based LEDs with QD based emission layer and the improvement of device performance by multilayer deposition
Eiji Itoh, Taisuke Sekino (Shinshu Univ.) OME2023-74
Abstract (in Japanese) (See Japanese page) 
(in English) In this research, we aimed to develop a multilayered light-emitting-diodes (QLEDs) with the semiconductor quantum dots and a polymer blend light emitting layer. We fabricated and evaluated the solution-processed organic-inorganic hybrid light-emitting device with the inverted structures. The improved meniscus method reduced the amount of material used for the luminescent layer per coating to less than 1/10 that of the spin coating method, and the film thickness was controlled by repeating the film formation 2-3 times. The threshold voltage and EQE were improved by QD: PMMA blend compared with QD: PVCz blend, and then operated at 2.4 V for orange QLEDs and 3.6 V for blue QLEDs. The device properties were further improved by inserting the ZrOx based hole blocking electron buffer layer and PMAH/Ag anode based on the low-temperature and solution-processable techniques.
Keyword (in Japanese) (See Japanese page) 
(in English) Quantum Dot / Polymer blend / Inverted structure / Solution processed multilayer / Meniscus coat / Light Emitting Diode / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 328, OME2023-74, pp. 33-37, Dec. 2023.
Paper # OME2023-74 
Date of Issue 2023-12-19 (OME) 
ISSN Online edition: ISSN 2432-6380
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)
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Conference Information
Committee OME  
Conference Date 2023-12-26 - 2023-12-27 
Place (in Japanese) (See Japanese page) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) biotechnology, surface and interfacial phenomena, measurement technology, electronics, etc. 
Paper Information
Registration To OME 
Conference Code 2023-12-OME 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Solution based LEDs with QD based emission layer and the improvement of device performance by multilayer deposition 
Sub Title (in English)  
Keyword(1) Quantum Dot  
Keyword(2) Polymer blend  
Keyword(3) Inverted structure  
Keyword(4) Solution processed multilayer  
Keyword(5) Meniscus coat  
Keyword(6) Light Emitting Diode  
1st Author's Name Eiji Itoh  
1st Author's Affiliation Shinsh University (Shinshu Univ.)
2nd Author's Name Taisuke Sekino  
2nd Author's Affiliation Shinsh University (Shinshu Univ.)
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Speaker Author-1 
Date Time 2023-12-27 10:20:00 
Presentation Time 30 minutes 
Registration for OME 
Paper # OME2023-74 
Volume (vol) vol.123 
Number (no) no.328 
Page pp.33-37 
Date of Issue 2023-12-19 (OME) 

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