Controlled fabrication, lasing behavior and excitonic recombination dynamics in single crystal CH3NH3PbBr3 perovskite cuboids

Fangtao Li, Junfeng Lu, Qinglin Zhang, Dengfeng Peng, Zheng Yang, Qian Xu, Caofeng Pan, Anlian Pan, Tianfeng Li, Rongming Wang
<span title="">2019</span> <i title="Elsevier BV"> <a target="_blank" rel="noopener" href="" style="color: black;">Science Bulletin</a> </i> &nbsp;
As a direct bandgap semiconductor, organic-inorganic lead halide perovskite (MAPbX 3 , MA = CH 3 NH 3 , X = Cl, Br, I) have been considered as promising materials for laser due to their excellent optoelectronic properties. The perovskite materials with 1D and 2D shapes were widely prepared and studied for Fabry-Pérot mode and whispering-gallery-mode (WGM) microcavities, but cuboid-shape is rarely reported. In this work, we successfully fabricated single crystal cuboid-shaped MAPbBr 3 perovskite
more &raquo; ... with different morphologies, named microcuboid-MAPbBr 3 (M-MAPbBr 3 ) and multi-step-MAPbBr 3 (MS-MAPbBr 3 ), via solvothermal method. Furthermore, the as-prepared crystals' excitonic recombination lifetime under different pumping energy density was studied by time-resolved photoluminescence (TRPL). Based on controllable morphology and remarkable lasing properties, these cuboid shaped single crystal perovskite could be a promising candidate for small laser, and other optoelectronic devices.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="">doi:10.1016/j.scib.2019.04.016</a> <a target="_blank" rel="external noopener" href="">fatcat:jr6fnxou5jbfloxzfin3kmw7dm</a> </span>
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