Short-chain ligand assisted synthesis of CH3NH3PbX3 (X = Cl, Br, I) perovskite quantum dots and improved morphology of CH3NH3PbBr3 thin films

摘要： Employing the short-chain C4H9NH3X (X = Cl, Br, I) compound as the unique capping agent, highly quality CH3NH3PbX3 (X = Cl, Br, I) perovskite quantum dots can be synthesized at room temperature in the open air, which possess high photoluminescence quantum yields and tunable emission in the range of 440-660 nm. Besides, C4H9NH3Br can also improve the morphology of CH3NH3PbBr3 thin films by spin-coating the N, N-dimerthylformamide solution of CH3NH3Br, C4H9NH3Br and PbBr2, making the thin film dense and compact, and improving its optical properties.