| 초록 |
In this study, organometal halide perovskites (CH3NH3PbX3, X = Br, I) quantum dots (QDs) are prepared by the excess oleic acid mediated ligand-assisted re-precipitation (LARP) method. Excess oleic acid improves the re-precipitation of QDs that initiates solvent mixing and leads to crystallization process while improving the full mixture of polar and nonpolar solvents. This process makes mixed halide perovskite (CH3NH3PbBr3-xIx) QDs more reproducible in synthesis and improves solution stability. Significantly, tunable emission wavelengths and energy band gaps are achieved by the quantum confinement effect. Finally, these stable CH3NH3PbBr3-xIx QDs from excess oleic acid are expected to have potential applications in optoelectronic devices. |
