Journal
INORGANIC CHEMISTRY
Volume 59, Issue 1, Pages 533-538Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.9b02806
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Funding
- National Key Research and Development Program of China [2017YFB0403601]
- National Natural Science Foundation of China [61675086, 61722504, 51772123]
- Science and Technology Development Program of Jilin Province [20190101016]
- State Scholarship Fund of China Scholarship Council
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Lead halide perovskites are excellent candidates for photo-electronic and photovoltaic applications, but the toxicity from lead is extremely concerning. Recently, Sn-based zero-dimensional lead-free perovskites synthesized using solid-state reaction techniques have become a new focus in the field. Here, we report a simple room temperature antisolvent method for the synthesis of all inorganic lead-free green emissive Cs4SnBr6 (emission at 524 nm) and cyan emissive Cs3KSnBr6 (emission at 500 run) zero-dimensional perovskites. Their photoluminescence quantum yields reach 20% and 35%, respectively. In addition, they maintain their emission for 46 and 55 h in the air, respectively, compared to only 5 min of CsSnBr3. This method provides a convenient way to do the research and apply these highly emissive perovskites.
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