One pot gram-scale synthesis of CsPbBr3 nanocrystals and their application in green LED

CsPbX 3 (X = Cl, Br, I) perovskite colloids have attracted considerable attention because of their excellent optical properties , low-threshold lasing, and multicolor electroluminescence . Much work on synthesis and application of CsPbX 3 have been performed in the past several years. In this study, a novel robust one-pot synthesis method of CsPbBr 3 nanocrystals (NCs) was developed, in which all the precursors are heated together in a flask. Gram-scale CsPbBX 3 NCs with a fluorescence quantum yield of around 77% was achieved in a few minutes. A green light-emitting diode (LED) was fabricated by coasting CsPbBr 3 NCs on the surface of an industrially available blue chip. The fabricated LED emitted bright-green light with high color purity. This method provides a simple and efficient method for the large-scale preparation of high-quality CsPbBr 3 NCs, and might pave the way for their practical applications in green LEDs.