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Paper Abstract and Keywords
Presentation 2024-12-06 11:40
Development of Deep-Ultraviolet Phosphors based on MgO via Hydrothermal Synthesis
Masahiro Okada, Yoichiro Neo, Moon Jonghyun (Shizuoka Univ.), Takahiro Matsumoto (Nagoya City Univ.) ED2024-53
Abstract (in Japanese) (See Japanese page) 
(in English) Far-UVC with a wavelength of 200-230 nm is effective in inactivating viruses without damaging cells in tissues. Conventional UVC disinfection cannot be used in the presence of humans because of the risk of skin cancer and cataracts with DNA damage. The purpose of this study is to develop a field emission lamp (FEL) as a far-UVC light source. The emission wavelength of the FEL depends on the band structure of the phosphor, and the luminous intensity depends on the amount of emission current and acceleration voltage. We have previously obtained deep ultraviolet luminescence at a wavelength of 229 nm from MgAl2O4 synthesized by a solid-state reaction using a carbon-based electron source, which can emit a large current and is inexpensive and easy to handle. To achieve even higher brightness and shorter wavelength, we focused on the hydrothermal synthesis method. This method enables us to control the size and shape of crystal growth. We report the ideal impurity concentration and emission wavelength obtained experimentally by synthesizing MgO as the base material and adding impurities.
Keyword (in Japanese) (See Japanese page) 
(in English) FEL / UV-C / Sterilizing lanps / Phosphors / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 293, ED2024-53, pp. 45-47, Dec. 2024.
Paper # ED2024-53 
Date of Issue 2024-11-28 (ED) 
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)
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Conference Information
Committee ED  
Conference Date 2024-12-05 - 2024-12-06 
Place (in Japanese) (See Japanese page) 
Place (in English) WINC AICHI 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Applications of electron and ion beam, general 
Paper Information
Registration To ED 
Conference Code 2024-12-ED 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Development of Deep-Ultraviolet Phosphors based on MgO via Hydrothermal Synthesis 
Sub Title (in English)  
Keyword(1) FEL  
Keyword(2) UV-C  
Keyword(3) Sterilizing lanps  
Keyword(4) Phosphors  
Keyword(5)  
Keyword(6)  
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1st Author's Name Masahiro Okada  
1st Author's Affiliation Shizuoka University (Shizuoka Univ.)
2nd Author's Name Yoichiro Neo  
2nd Author's Affiliation Shizuoka University (Shizuoka Univ.)
3rd Author's Name Moon Jonghyun  
3rd Author's Affiliation Shizuoka University (Shizuoka Univ.)
4th Author's Name Takahiro Matsumoto  
4th Author's Affiliation Nagoya City University (Nagoya City Univ.)
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Speaker Author-1 
Date Time 2024-12-06 11:40:00 
Presentation Time 20 minutes 
Registration for ED 
Paper # ED2024-53 
Volume (vol) vol.124 
Number (no) no.293 
Page pp.45-47 
#Pages 3 
Date of Issue 2024-11-28 (ED) 

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