Inside Perovskites: Quantum Luminescence from Bulk Cs4PbBr6 Single Crystals
Authorsde Bastiani, Michele
Saidaminov, Makhsud I.
Roqan, Iman S.
Mohammed, Omar F.
KAUST DepartmentKAUST Solar Center (KSC)
Physical Sciences and Engineering (PSE) Division
Imaging and Characterization Core Lab
Advanced Membranes and Porous Materials Research Center
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AbstractZero-dimensional perovskite-related structures (0D-PRS) are a new frontier of perovskite-based materials. 0D-PRS, commonly synthesized in powder form, manifest distinctive optical properties such as strong photoluminescence (PL), narrow emission linewidth, and high exciton binding energy. These properties make 0D-PRS compelling for several types of optoelectronic applications, including phosphor screens and electroluminescent devices. However, it would not be possible to rationally design the chemistry and structure of these materials, without revealing the origins of their optical behaviour, which is contradictory to the well-studied APbX3 perovskites. In this work, we synthesize single crystals of Cs4PbBr6 0D-PRS, and investigated the origins of their unique optical and electronic properties. The crystals exhibit a PL quantum yield higher than 40%, the highest reported for perovskite-based single crystals. Time-resolved and temperature dependent PL studies, supported by DFT calculations, and structural analysis, elucidate an emissive behaviour reminiscent of a quantum confined structure rather than a typical bulk perovskite material.
CitationDe Bastiani M, Dursun I, Zhang Y, Alshankiti BA, Miao X-H, et al. (2017) Inside Perovskites: Quantum Luminescence from Bulk Cs4PbBr6 Single Crystals. Chemistry of Materials. Available: http://dx.doi.org/10.1021/acs.chemmater.7b02415.
SponsorsThe authors acknowledge the financial support of KAUST and Saudi Aramco (Grant RGC/3/3095-01).
PublisherAmerican Chemical Society (ACS)
JournalChemistry of Materials