科研之友
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摘要
Lead halide perovskites have attracted significant attention in the past few years due to their outstanding performance in photovoltaic devices. Nanoscale versions of these materials are also good candidates for light emitting devices. In this work, we synthesize perovskite nanocrystals using a surfactant-free method by introducing antimony iodide in the perovskite precursor. Surface-bound (CH3NH3)(3)Sb2I9 layers restrict the growth of CH3NH3PbI3, resulting in CH3NH3PbI3 nanocrystals of about 50 nm in size. Compared to the bulk perovskites, the nanocrystals show stronger photoluminescence. As there are no long-chain organic ligands on the surface that will inhibit the charge transport, these surfactant-free nanocrystals may have better performance in photoelectronic devices.
- 出版日期2018-6-28
