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An All‐Inorganic Perovskite‐Phase Rubidium Lead Bromide Nanolaser
Author(s) -
Tang Bing,
Hu Yingjie,
Dong Hongxing,
Sun Liaoxin,
Zhao Binbin,
Jiang Xiongwei,
Zhang Long
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201910617
Subject(s) - perovskite (structure) , photoluminescence , halide , formamidinium , materials science , rubidium , lasing threshold , phase (matter) , optoelectronics , chemistry , inorganic chemistry , crystallography , wavelength , potassium , organic chemistry , metallurgy
Rubidium lead halides (RbPbX 3 ), an important class of all‐inorganic metal halide perovskites, are attracting increasing attention for photovoltaic applications. However, limited by its lower Goldschmidt tolerance factor t ≈0.78, all‐inorganic RbPbBr 3 has not been reported. Now, the crystal structure, X‐ray diffraction (XRD) pattern, and band structure of perovskite‐phase RbPbBr 3 has now been investigated. Perovskite‐phase RbPbBr 3 is unstable at room temperature and transforms to photoluminescence (PL)‐inactive non‐perovskite. The structural evolution and mechanism of the perovskite–non‐perovskite phase transition were clarified in RbPbBr 3 . Experimentally, perovskite‐phase RbPbBr 3 was realized through a dual‐source chemical vapor deposition and annealing process. These perovskite‐phase microspheres showed strong PL emission at about 464 nm. This new perovskite can serve as a gain medium and microcavity to achieve broadband (475–540 nm) single‐mode lasing with a high Q of about 2100.