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Paper Abstract and Keywords
Presentation 2019-01-25 10:40
[Poster Presentation] Improvement of luminescent characteristics by atmospheric post-annealing for Y4Si2O7N2:Eu3+ red phosphor synthesized in NH3
Kodai Nakamoto, Misa Kawashima, Ken Kinoshita, Yuichiro Hatanaka, Tadashi Ishigaki (Tottori Unv.), Takashi Kunimoto (Tokushima Bunri Univ.), Tetsuo Honma (JASRI), Koutoku Ohmi (Tottori Unv.) EID2018-16
Abstract (in Japanese) (See Japanese page) 
(in English) Y4Si2O7N2:Eu3+ phosphor has been synthesized in an NH3 atmosphere. The synthesized sample shows a red emission due to Eu3+ and a broad charge transfer state (CTS) excitation band in the near-UV region. The corresponding CTS energy is about 3.61 eV, which is almost same as 3.58 eV of La2O2S: Eu3+. The PL intensity is furthermore increased by post-annealing in air. From the X-ray Absorption Fine Structure (XAFS) measurement, it is confirmed that the Eu3+ in the post-annealed phosphor sample is more than 90%. It concludes that stoichiometric N composition is achieved by the synthesis in NH3, resulting in the enhancement of Eu3+ activation.
Keyword (in Japanese) (See Japanese page) 
(in English) Y4Si2O7N2:Eu3+ / red phosphor / white LED / CTS excitation band / synthesis in NH3 / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 422, EID2018-16, pp. 109-112, Jan. 2019.
Paper # EID2018-16 
Date of Issue 2019-01-17 (EID) 
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)
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Conference Information
Committee EID ITE-IDY IEIJ-SSL SID-JC IEE-EDD  
Conference Date 2019-01-24 - 2019-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Kagoshima University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EID 
Conference Code 2019-01-EID-IDY-SSL-JC-EDD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of luminescent characteristics by atmospheric post-annealing for Y4Si2O7N2:Eu3+ red phosphor synthesized in NH3 
Sub Title (in English)  
Keyword(1) Y4Si2O7N2:Eu3+  
Keyword(2) red phosphor  
Keyword(3) white LED  
Keyword(4) CTS excitation band  
Keyword(5) synthesis in NH3  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Kodai Nakamoto  
1st Author's Affiliation Tottori University (Tottori Unv.)
2nd Author's Name Misa Kawashima  
2nd Author's Affiliation Tottori University (Tottori Unv.)
3rd Author's Name Ken Kinoshita  
3rd Author's Affiliation Tottori University (Tottori Unv.)
4th Author's Name Yuichiro Hatanaka  
4th Author's Affiliation Tottori University (Tottori Unv.)
5th Author's Name Tadashi Ishigaki  
5th Author's Affiliation Tottori University (Tottori Unv.)
6th Author's Name Takashi Kunimoto  
6th Author's Affiliation Tokushima Bunri University (Tokushima Bunri Univ.)
7th Author's Name Tetsuo Honma  
7th Author's Affiliation Japan Synchrotron Radiation Research Institute (JASRI)
8th Author's Name Koutoku Ohmi  
8th Author's Affiliation Tottori University (Tottori Unv.)
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Speaker Author-1 
Date Time 2019-01-25 10:40:00 
Presentation Time 5 minutes 
Registration for EID 
Paper # EID2018-16 
Volume (vol) vol.118 
Number (no) no.422 
Page pp.109-112 
#Pages 4 
Date of Issue 2019-01-17 (EID) 

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