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Small‐Molecule‐Doped Organic Crystals with Long‐Persistent Luminescence
Author(s) -
Han Jiangli,
Feng Wenhui,
Muleta Desissa Yadeta,
Bridgmohan Chelsea Nicole,
Dang Yangyang,
Xie Guohua,
Zhang Haoli,
Zhou Xueqin,
Li Wei,
Wang Lichang,
Liu Dongzhi,
Dang Yanfeng,
Wang Tianyang,
Hu Wenping
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201902503
Subject(s) - materials science , luminescence , doping , afterglow , nanotechnology , crystallization , photoexcitation , molecule , optoelectronics , chemical engineering , organic chemistry , excited state , chemistry , physics , gamma ray burst , astronomy , nuclear physics , engineering
Traditional long‐persistent luminescence (LPL) materials, which are based on inorganic systems containing rare elements and with preparation temperatures of at least 1000 °C, exhibit afterglow times of more than 10 h and can be tuned for different applications. However, the development of this field is hindered due to the large thermal energy consumption and the need for nonrenewable resources. Thus, the development of a “green” design and preparation of LPL materials is of some importance. A doped‐crystalline material based on two metal‐free organic small molecules is easily prepared through ultrasonic crystallization at room temperature. It has a high‐quality, single‐crystalline structure, and visible LPL performance with a duration of more than 6 s upon low‐energy photoexcitation. A green, flexible, and convenient screen‐printing technology for controllable pattern anticounterfeiting is then developed from this purely organic material, which improves the prospects for commercial utilization in the future.