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Paper Abstract and Keywords
Presentation 2026-01-26 13:00
[Invited Talk] Preparation of Thiophene/Phenylene Co-Oligomer Nanocrystals and Their Size-Dependent Optical Properties
Hitoshi Mizuno (TPU), Tomomi Jinjyo (NAIST), Fumio Sasaki (Univ. Tsukuba) OME2025-52
Abstract (in Japanese) (See Japanese page) 
(in English) Nanocrystals of 5,5′-bis(4-biphenylyl)-2,2′-bithiophene (BP2T) which is a type of thiophene/phenylene co-oligomer (TPCO) were prepared using a miniemulsion method. When the BP2T nanocrystal size decreased to less than 600 nm, the peak energy of 0-1 emission band blue-shifted by 0.17 eV compared to bulk crystals. As the nanocrystal size decreased further, the entire emission band exhibited a gradual blue shift. At a size of 150 nm, the emission energy became comparable to that of the monomer state. The size-dependent optical properties can be attributed to the combined effect based on the surface effects including the lattice softening, and quantum effects involving the specific surface area-dependent site shift effect and exciton confinement.
Keyword (in Japanese) (See Japanese page) 
(in English) Thiophene/phenylene co-oligomer (TPCO) / Nanocrystal / Size effect / Surface effect / Quantum effect / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 337, OME2025-52, pp. 1-5, Jan. 2026.
Paper # OME2025-52 
Date of Issue 2026-01-19 (OME) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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)
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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) Preparation of Thiophene/Phenylene Co-Oligomer Nanocrystals and Their Size-Dependent Optical Properties 
Sub Title (in English)  
Keyword(1) Thiophene/phenylene co-oligomer (TPCO)  
Keyword(2) Nanocrystal  
Keyword(3) Size effect  
Keyword(4) Surface effect  
Keyword(5) Quantum effect  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Hitoshi Mizuno  
1st Author's Affiliation Toyama Prefectural University (TPU)
2nd Author's Name Tomomi Jinjyo  
2nd Author's Affiliation Nara Institute of Science and Technology (NAIST)
3rd Author's Name Fumio Sasaki  
3rd Author's Affiliation University of Tsukuba (Univ. Tsukuba)
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Speaker Author-1 
Date Time 2026-01-26 13:00:00 
Presentation Time 45 minutes 
Registration for OME 
Paper # OME2025-52 
Volume (vol) vol.125 
Number (no) no.337 
Page pp.1-5 
#Pages 5 
Date of Issue 2026-01-19 (OME) 

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