碩士 國立臺北科技大學 光電工程系 107 In this study, the perovskite FAPbX3 quantum dots was prepared by using the ultrasonic oscillation method to prepare quantum dot solution. It is mainly to synthesize FAPbX3 Perovskite Quantum Dots (QD-FAPbBr2I, FAPbBr1.5I1.5, FAPbBrI2) by a simple method to calculate the equivalent powder, and then dope n-octylamine, oleic acid to make QD better. The exciton binding energy, surface morphology and stability, the color part is brown-red, can get higher wavelength light after excitation. In order to make the perovskite quantum dot solution more widely used, we tried to prepare a thin film of QD-FAPbX3 quantum dot solution by spin coating, and it can be used as an active layer on the light emitting diode element. The preparation of the film through the purification process, the synthesis of the ligand (oleic acid) is removed, the purified QD-FAPbX3 powder as Chlorobenzene (CB) as a dispersion solvent, coated in the device structure is Glass/ITO/PEDOT: PSS/PVK/QD-FAPbX3/PVK /TPBi/Ag light-emi