Preparation and study of luminescent materials for organic light emitting diodes

• Main Authors: GUO, TING-WEI, 郭庭維
• Other Authors: YU, YANG-YEN
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/xsrjhn

碩士 === 明志科技大學 === 材料工程系碩士班 === 106 === In this study, the organic halogenated perovskite MAPbX3 (MA = CH3NH3, X = Cl, Br, I) materials were prepared and applied in the organic light-emitting diode (OLED) as a fluorescent layer. The energy level of photon for the halogenated perovskite materials could be tuned to reach a wide color gamut and high purity of RGB colors. In the preparation, many important operating conditions, including the different ratios of solvents (DMF:CB), addition of polymer additives (P2VP, PI), and the effect of modified layer (COC, PMMA), were optimized to enhance the fluorescence intensity for the perovskite materials. In the analysis of optical properties, the photoluminescence was used for the fluorescent solutions (Quantum Dots) and hybrid films. Moreover, the perovskite materials with the best film deposition properties, high crystallinity, and good fluorescence intensity were selected to apply in the OLED device as a fluorescent layer. The results of this study showed that the OLED device made of an organic halogenated perovskite fluorescent material as a light-emitting layer could be prepared by the method shown in this study, and a voltage of 5 V could successfully light the device and show the green fluorescence. The best fluorescence intensity, fluorescent purity, and device stability were 1.54*108 PL Counts, FWHM=26-28 nm, and 1 h, respectively.