Photon Upconversion Dyes System with Red to Yellow Wavelength Conversion Function

Hirokazu YAMANE  Mayo KAWAHARA  Genta TAKATOKI  Masataka TAGUCHI  Yasuhiro YAMASAKI  Toshihiko NAGAMURA  

IEICE TRANSACTIONS on Electronics   Vol.E102-C   No.2   pp.107-112
Publication Date: 2019/02/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.2018OMP0005
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Organic Molecular Electronics and Biotechnology)
photon upconversion,  triplet-triplet annihilation,  sensitizer,  emitter,  phthalocyanine,  

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Photon upconversion (UC) is a technique to convert long wavelength light into short wavelength light. UC fluorescence by triplet-triplet annihilation (TTA) follows a mechanism involving two kinds of molecules as sensitizer and emitter. In this study, we constructed the photon UC dyes system that was applicable to weak excitation light and convert the red light into yellow light in high efficiency. The present result will be useful for the purpose of application to optical elements and light medical care.