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A Lead‐Free All‐Inorganic Metal Halide with Near‐Unity Green Luminescence
Author(s) -
Zhang Ruiling,
Mao Xin,
Zheng Daoyuan,
Yang Yang,
Yang Songqiu,
Han Keli
Publication year - 2020
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.202000027
Subject(s) - halide , photoluminescence , rietveld refinement , luminescence , materials science , green light , quantum yield , environmentally friendly , metal , crystal structure , molecular engineering , crystal engineering , optoelectronics , nanotechnology , inorganic chemistry , crystallography , chemistry , optics , blue light , physics , metallurgy , supramolecular chemistry , ecology , fluorescence , biology
As 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‐Cs 3 Cu 2 Cl 5 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.