发光
材料科学
单晶
矿物学
化学
激子
声子
结晶学
Crystal(编程语言)
作者
Michele De Bastiani,Ibrahim Dursun,Yuhai Zhang,Buthainah Alshankiti,Xiaohe Miao,Jun Yin,Emre Yengel,Erkki Alarousu,Bekir Turedi,Jawaher Almutlaq,Makhsud I. Saidaminov,Somak Mitra,Issam Gereige,Ahmed Al-Saggaf,Yihan Zhu,Yu Han,Iman S. Roqan,Jean-Luc Brédas,Omar F. Mohammed,Osman M. Bakr
标识
DOI:10.1021/acs.chemmater.7b02415
摘要
Zero-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 line width, 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 behavior, 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 ...
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