期刊
ADVANCED OPTICAL MATERIALS
卷 8, 期 1, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201901606
关键词
lead-free perovskites; light emission; nanocrystals
资金
- Ontario Research Fund-Research Excellence Program
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Global Research Outreach program of Samsung Advanced Institute of Technology
- Banting Postdoctoral Fellowship Program by the Government of Canada
- department of energy (DOE) Office of Science User Facility [DE-AC05-00OR22725]
Metal halide perovskites have gained attention for their optoelectronic properties and are employed as the active layer in solar cells, light-emitting diodes, and photodetectors. However, the use of lead in the best-performing perovskite devices may limit their wider application. Prior reports of lead-free perovskite nanoparticles have exhibited linewidths more than twice as wide as their lead-halide counterparts, limiting their attainable color gamut. Here the solution synthesis of lead-free Rb3Sb2I9 nanoplatelets and single crystals is reported; the single crystals exhibit broad (full-width at half-maximum (FWHM) = 75 nm) photoluminescence centered at 635 nm, while the nanoplatelets exhibit narrow emission (FWHM = 21 nm) at 512 nm. The photoluminescence quantum yield of both the single crystals and nanoplatelets is low and the present demonstration of the narrowest emission among all lead-free perovskites reported to date motivates further study of how these and related materials can achieve further-enhanced brightness.
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