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Paper Abstract and Keywords
Presentation 2026-01-26 13:45
Organic photodiodes using curcumin as a photoactive material
Shuzo Miyamoto, Masahiro Morimoto, Shigeki Naka (Univ of Toyama) OME2025-53
Abstract (in Japanese) (See Japanese page) 
(in English) Organic semiconductors offer advantages such as mechanical flexibility and low-cost fabrication, but their dependence on petroleum-based materials remains a challenge. In this study, organic photodiodes using curcumin, a plant-derived material, as a photoactive component were fabricated, and the effects of the curcumin content in the active layer and the choice of electron extraction layer on device performance were investigated. Increasing the curcumin ratio relative to the organic semiconductor polymer enhanced the photocurrent under reverse bias, while also leading to higher dark current. Replacing the electron extraction layer from LiF to MoO₃ further increased the photocurrent; however, a significant rise in dark current and saturation behavior were observed. These results indicate that suppressing dark current is essential for achieving high-performance curcumin-based organic photodiodes.
Keyword (in Japanese) (See Japanese page) 
(in English) Organic semiconductors / curcumin / natural pigment / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 337, OME2025-53, pp. 6-9, Jan. 2026.
Paper # OME2025-53 
Date of Issue 2026-01-19 (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 OME2025-53

Conference Information
Committee OME  
Conference Date 2026-01-26 - 2026-01-26 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To OME 
Conference Code 2026-01-OME 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Organic photodiodes using curcumin as a photoactive material 
Sub Title (in English)  
Keyword(1) Organic semiconductors  
Keyword(2) curcumin  
Keyword(3) natural pigment  
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1st Author's Name Shuzo Miyamoto  
1st Author's Affiliation University of Toyama (Univ of Toyama)
2nd Author's Name Masahiro Morimoto  
2nd Author's Affiliation University of Toyama (Univ of Toyama)
3rd Author's Name Shigeki Naka  
3rd Author's Affiliation University of Toyama (Univ of Toyama)
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Speaker Author-1 
Date Time 2026-01-26 13:45:00 
Presentation Time 25 minutes 
Registration for OME 
Paper # OME2025-53 
Volume (vol) vol.125 
Number (no) no.337 
Page pp.6-9 
#Pages 4 
Date of Issue 2026-01-19 (OME) 

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