Discovery of Key TIPS-Naphthalene for Efficient Visible-to-UV Photon Upconversion under Sunlight and Room Light**

被引：80
作者：
Harada, Naoyuki [1 ]
Sasaki, Yoichi [1 ]
Hosoyamada, Masanori [1 ]
Kimizuka, Nobuo [1 ]
Yanai, Nobuhiro [1 ,2 ]
机构：
[1] Kyushu Univ, Grad Sch Engn, Dept Chem & Biochem, Ctr Mol Syst CMS,Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan
[2] JST, PRESTO, Honcho 4-1-8, Kawaguchi, Saitama 3320012, Japan
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 01期
关键词：
LED; photon upconversion; TIPS-naphthalene; triplet– triplet annihilation; UV light; TRIPLET-TRIPLET ANNIHILATION; LOW-POWER; NANOCRYSTALS; WATER;
D O I：
10.1002/anie.202012419
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
While many studies have been done on triplet-triplet annihilation-based photon upconversion (TTA-UC) to produce visible light with high efficiency, the efficient TTA-UC from visible to UV light, despite its importance for a variety of solar and indoor applications, remains a challenging task. Here, we report the highest visible-to-UV TTA-UC efficiency of 20.5 % based on the discovery of an excellent UV emitter, 1,4-bis((triisopropylsilyl)ethynyl)naphthalene (TIPS-Nph). TIPS-Nph is an acceptor with desirable features of high fluorescence quantum yield and high singlet generation efficiency by TTA. TIPS-Nph has a low enough triplet energy level to be sensitized by Ir(C6)(2)(acac), a superior donor that does not quench UV emission. The combination of TIPS-Nph and Ir(C6)(2)(acac) realizes the efficient UV light production even with weak light sources such as an AM 1.5 solar simulator and room LEDs.
引用
收藏
页码：142 / 147
页数：6
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