Fluorescence‐enhanced Cs4PbBr6/CsPbBr3 composites films synthesized by double‐films solid phase reaction method
Luminescence2020Vol. 36(3), pp. 631–641
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Abstract
Due to indispensable ligands, polluted organic solution, or complex vapour deposition, stable CsPbBr3 film is hard to be prepared directly using a simple and environmentally friendly method. To improve the stability of CsPbBr3 film and its synthesis methods, the double-films solid phase reaction was developed, and Cs4 PbBr6 /CsPbBr3 composites were designed. Although the synthesized particle had a size of 2-5 μm, much larger than that of quantum dots, in ambient conditions the composites films still showed good photoluminescence properties, with the highest photoluminescence quantum yield of 80%. It had good stability against air, temperature and humidity, and even had interesting fluorescence-enhanced phenomenon after about 4 days.
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