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Reversible and Continuous Color-Tunable Persistent Luminescence of Metal-Free Organic Materials by "Self"-Interface Energy Transfer.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-12-26 , DOI: 10.1021/acsami.9b19919 Yingxiao Mu 1 , Bingjia Xu 1 , Zhan Yang 1 , Hanhui Wen 2 , Zhiyong Yang 1 , Sunil Kumar Baburao Mane 1 , Juan Zhao 1 , Yi Zhang 1 , Zhenguo Chi 1 , Ben Zhong Tang 3
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-12-26 , DOI: 10.1021/acsami.9b19919 Yingxiao Mu 1 , Bingjia Xu 1 , Zhan Yang 1 , Hanhui Wen 2 , Zhiyong Yang 1 , Sunil Kumar Baburao Mane 1 , Juan Zhao 1 , Yi Zhang 1 , Zhenguo Chi 1 , Ben Zhong Tang 3
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Persistent luminescence from metal-free organic materials is attractive for their ultralong exciton lifetimes. Color-tunable persistent luminescence from single-component organic materials is fascinating but still challenging. By utilizing an efficient approach of "self"-interface energy transfer (IET), the persistent luminescence color of an organic phosphor (CTXO) can be reversibly and continuously tuned by external physical stimuli. Its color circularly changes between green (lifetime = 0.24 s) and deep-yellow (lifetime = 0.10 s) when CTXO is repeatedly triggered with thermal annealing and mechanical grinding. Self-IET from the crystalline part (donor), which exhibits persistent room-temperature phosphorescence, to the amorphous part (acceptor) inside its semicrystal during these treatments is found to be the key exciton process for such novel color modulation. This also provides opportunity for designing stimuli-responsive smart materials with controlled persistent luminescence.
中文翻译：
通过“自”-界面能量转移，无金属有机材料可逆且连续可调光的持久发光。
无金属有机材料的持久发光因其超长的激子寿命而具有吸引力。单组分有机材料的颜色可调节的持久发光引人入胜，但仍具有挑战性。通过利用“自我”界面能量转移（IET）的有效方法，有机磷光体（CTXO）的持久发光颜色可以通过外部物理刺激可逆地连续调节。当通过热退火和机械研磨反复触发CTXO时，其颜色在绿色（寿命= 0.24 s）和深黄色（寿命= 0.10 s）之间循环变化。来自结晶部分（供体）的自我IET，表现出持续的室温磷光，在这些处理过程中，发现其半结晶内部的非晶态部分（受体）是这种新颖的色彩调制的关键激子过程。这也为设计具有可控持续发光的刺激响应性智能材料提供了机会。
更新日期：2020-01-14
中文翻译：
通过“自”-界面能量转移，无金属有机材料可逆且连续可调光的持久发光。
无金属有机材料的持久发光因其超长的激子寿命而具有吸引力。单组分有机材料的颜色可调节的持久发光引人入胜，但仍具有挑战性。通过利用“自我”界面能量转移（IET）的有效方法，有机磷光体（CTXO）的持久发光颜色可以通过外部物理刺激可逆地连续调节。当通过热退火和机械研磨反复触发CTXO时，其颜色在绿色（寿命= 0.24 s）和深黄色（寿命= 0.10 s）之间循环变化。来自结晶部分（供体）的自我IET，表现出持续的室温磷光，在这些处理过程中，发现其半结晶内部的非晶态部分（受体）是这种新颖的色彩调制的关键激子过程。这也为设计具有可控持续发光的刺激响应性智能材料提供了机会。
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