Ruiling Zhang1, Xin Mao2,3, Daoyuan Zheng1, Yang Yang2, Songqiu Yang2, Keli Han1,2
1Institute of Molecular Sciences and Engineering, Shandong University, Qingdao 266237, P. R. China
2State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, P.R. China
3University of the Chinese Academy of Sciences Beijing 100039 P. R. China
Tóm tắt
AbstractAs the increasing demand of lighting display technology, environmentally‐friendly, economic light‐emitting materials with high performance are required. Herein, a novel solution‐processed, highly emissive copper chloride compound β‐Cs3Cu2Cl5 is reported. The crystal structure determined by the Rietveld refinement of the powder X‐ray diffraction patterns shows that the corner‐sharing tetrahedral Cu–Cl chains are surrounded by Cs+ cations, yielding a one‐dimensional structure at molecular level. The all‐inorganic compound shows excellent photostability, and is thermally stable up to 550 °C. Excitingly, it exhibits room‐temperature photoluminescence in the green region with near‐unity quantum yield. Currently, this appears to be the most efficient lead‐free all‐inorganic green‐light emitting metal halides reported. This work presents a new direction toward the design of high‐efficiency, economic, and environmentally‐friendly light‐emitting materials.
