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Codoping of Lead‐Free Double Perovskites Promotes Near‐Infrared Photoluminescence
Author(s) -
Wang Chao,
Zhao Guangjiu
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202009896
Subject(s) - photoluminescence , infrared , materials science , excited state , ion , perovskite (structure) , absorption (acoustics) , optoelectronics , relaxation (psychology) , electron , luminescence , chemistry , atomic physics , optics , physics , crystallography , psychology , social psychology , organic chemistry , composite material , quantum mechanics
Abstract In the rapidly developing smart era, near‐infrared luminescent materials have important applications in various fields that are closely related to people. Nag and co‐workers provided a first codoping strategy to achieve efficient near‐infrared photoluminescence in lead‐free double perovskite materials. Through the introduction of Bi 3+ ions, a new energy state is formed that leads to the absorption of lower‐energy light. The excited state formed by this light absorption subsequently excites f‐electrons of Er 3+ or Yb 3+ ions, and the relaxation of these f‐electrons results in near‐infrared photoluminescence. This may open a new chapter in the application of perovskites for infrared detection and human sensing.