发光
材料科学
兴奋剂
发色团
分子
化学物理
Crystal(编程语言)
纳米晶
格子(音乐)
同质性(统计学)
晶体生长
纳米技术
光电子学
结晶学
光化学
有机化学
化学
物理
统计
计算机科学
数学
程序设计语言
声学
作者
Shuangyue Cui,Tianwen Zhu,Leilei Zhang,Xin Ye,Quanxiang Han,Chao Ge,Qing Guo,Xiaoxin Zheng,Qinglian Lin,Cuicui Li,Jun Jiang,Wang Zhang Yuan,Yang Liu,Xutang Tao
标识
DOI:10.1002/adom.202102355
摘要
Abstract Host–guest systems constitute a primary subclass of long persistent luminescent (LPL) materials. Doped organic crystals serve as model platforms to clarify the intricate effect of chromophores embedded in an ordered lattice background. However, construction of doped organic crystals through traditional solution method is restricted by drawbacks such as inhomogeneity and imprecise quantification. In this report, a series of doped organic crystals is grown by a melt growth technique with centimeter‐scale size and precisely controlled concentration and homogeneity. Although the host crystals are neutral with neither heavy atoms nor any functional groups, they show enhanced long persistent luminescence with lifetimes of nearly three orders longer than those of the pure guest molecules. Moreover, the LPL wavelength, lifetime, and quantum yield can be tuned by different host–guest combination and doping concentration. Theoretical optimizations reveal that the guest molecules are substitutively rather than interstitially embedded in the host crystal lattice. The results prove melt growth to be an effective way to build and to finely control host–guest long persistent luminescent systems.
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