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The hydrohalic acid additives have been used in perovskite thin films to improve the film morphology and optical properties. However, our study demonstrated that the hydrochloric acid (HCl) additive greatly improved the surface coverage but lowered the photoluminescence (PL) emission intensities of HC(NH2)2PbBr3 (HC(NH2)2 = FA) films. The effects of organic cation and hydrochloric acid additive on...
The perovskite CH3NH3PbBr3 films were synthesized by mixing the solution of CH3NH3Br and PbBr2. The effect of modulating the molar ratios of organic to inorganic content on morphology and optical properties of CH3NH3PbBr3 was explored. The optical band gap of CH3NH3PbBr3 can be tuned from visible to infrared regions by changing the CH3NH3Br content. It was also found that the photoluminescence (PL)...
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