Jinnai Kazuya, Nishimura Naohiro, Adachi Chihaya, Kabe Ryota
Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
Nanoscale. 2021 May 14;13(18):8412-8417. doi: 10.1039/d0nr09227d. Epub 2021 Apr 28.
Glow-in-the-dark materials can store absorbed photon energy and emit light for long periods of time. While inorganic long-persistent luminescence (LPL) materials are crystalline and often require rare metals, organic LPL (OLPL) materials are flexible and require no rare metals. The emission process of OLPL systems consists of photoinduced charge separation, charge accumulation, and emission from charge recombination. Although emission processes of OLPL systems have been investigated, the charge separation and accumulation processes remain enigmatic. In this study, we investigated the charge carrier dynamics of a binary OLPL system comprising of electron donors and acceptors. We confirmed the presence of thermal activation processes, thermally activated delayed fluorescence and thermoluminescence in the OLPL system.
夜光材料可以存储吸收的光子能量并长时间发光。无机长余辉发光（LPL）材料是晶体，通常需要稀有金属，而有机LPL（OLPL）材料具有柔韧性且不需要稀有金属。OLPL系统的发光过程包括光诱导电荷分离、电荷积累以及电荷复合发光。尽管已经对OLPL系统的发光过程进行了研究，但电荷分离和积累过程仍然是个谜。在本研究中，我们研究了由电子供体和受体组成的二元OLPL系统的电荷载流子动力学。我们证实了OLPL系统中存在热激活过程、热激活延迟荧光和热释光。
