Low-threshold amplified spontaneous emission and lasing from colloidal nanocrystals of caesium lead halide perovskites
Bodnarchuk, Maryna I.
De Luca, Gabriele
Kovalenko, Maksym V.
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
Metal halide semiconductors with perovskite crystal structures have recently emerged as highly promising optoelectronic materials. Despite the recent surge of reports on microcrystalline, thin-film and bulk single-crystalline metal halides, very little is known about the photophysics of metal halides in the form of uniform, size-tunable nanocrystals. Here we report low-threshold amplified spontaneous emission and lasing from ∼10 nm monodisperse colloidal nanocrystals of caesium lead halide perovskites CsPbX3 (X=Cl, Br or I, or mixed Cl/Br and Br/I systems). We find that room-temperature optical amplification can be obtained in the entire visible spectral range (440–700 nm) with low pump thresholds down to 5±1 μJ cm−2 and high values of modal net gain of at least 450±30 cm−1. Two kinds of lasing modes are successfully observed: whispering-gallery-mode lasing using silica microspheres as high-finesse resonators, conformally coated with CsPbX3 nanocrystals and random lasing in films of CsPbX3 nanocrystals. Show more
Journal / seriesNature Communications
Pages / Article No.
PublisherNature Publishing Group
Organisational unit03934 - Kovalenko, Maksym / Kovalenko, Maksym
03918 - Fiebig, Manfred / Fiebig, Manfred
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