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The Renascence of One Ancient Recipe for Synthesizing Luminescent Cs 4 PbBr 6 Microcrystals
Author(s) -
Song Tao,
Ma Bo,
Wang Hao,
Zhang Xiao-Dong,
Zhao Min,
Zheng Pei-Zhu,
Gao Fei,
Wang Qiang,
Zhang Hao-Li
Publication year - 2021
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.202100169
Subject(s) - photoluminescence , quantum yield , luminescence , octahedron , fabrication , materials science , exothermic reaction , crystal growth , perovskite (structure) , nanotechnology , exciton , diode , light emitting diode , yield (engineering) , optoelectronics , chemical engineering , crystal structure , chemistry , crystallography , optics , composite material , organic chemistry , condensed matter physics , physics , medicine , alternative medicine , pathology , fluorescence , engineering
One ancient recipe to produce rocky candies has found new applications in synthesizing Cs 4 PbBr 6 microcrystals, one 0D perovskite with [PbBr 6 ] 4− octahedra isolated by Cs + bridges that enable quantum confinement and high exciton binding energy favorable for photoluminescence (PL). Herein, various threads are used as seeds to grow perovskites microcrystals, in a way similar to rocky candy production recorded in ancient Chinese recipes. The Cs 4 PbBr 6 growth is an exothermic enthalpy driving process, with the surface energy differentiation determining the formation of rhombohedra shape. The synthesized Cs 4 PbBr 6 microcrystals show a large PL quantum yield (PLQY) of 31.5% and are used to fabricate white and green light‐emitting diodes with high performance. Learning from history, this work provides one controllable and generally applicable avenue of fabricating high‐quality perovskite crystals with promising applications in photonic and optoelectronic devices, and the elucidation of the growth mechanism offers useful guidance for critical factors directing crystal fabrications in future work.