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Abstract Employed the different chain length CnH2n+1NH3Br (n > 1) additives as the surface ligand, we have studied the morphology and optical properties of CH3NH3PbBr3 perovskite thin films systematically. As the alkyl… Click to show full abstract
Abstract Employed the different chain length CnH2n+1NH3Br (n > 1) additives as the surface ligand, we have studied the morphology and optical properties of CH3NH3PbBr3 perovskite thin films systematically. As the alkyl chain-length of incorporated CnH2n+1NH3Br compound into the precursor solution increases, the sizes of CH3NH3PbBr3 crystal decrease, leading that the morphology of the corresponding films get better and the peak positions of photoluminescence (PL) spectra shift-blue. And the best CH3NH3PbBr3 perovskite thin films can be obtained with the C4H9NH3Br addition in the precursor solution, which is attributed to the excellent properties of (C4H9NH3)2PbBr4 material.
Journal Title: Optical Materials
Year Published: 2020
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