Synthesis and Characterization of Electrophosphorescent Polymers based on tetraphenylsilane and 9,9-dioctylfluorene with Iridium Complexes

• Main Authors: Wai-Hong Lai, 賴韋宏
• Other Authors: Ou-Yang W.-C.
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/90129312620034224637

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系 === 97 === This research illustrates the synthesis of the phosphorescent light emitting diodes (PHOLEDs) by the host conjugated polymer both poly-tetraphenylsilane or and poly(9,9-dioctylfluorene-tetraphenylsilane), and copolymerized with phosphorescent Ir complex using through Suzuki Cross coupling reaction. First, we synthesized the green Ir complex was synthesized, then the red Ir complex, which were bonded to and the both conjugated polymer, poly-tetraphenylsilane or and poly(9,9-dioctylfluorene-tetraphenyl-silane) is bonded by the chemical bond. then we utilize The ultraviolet and visible light spectroscopy (UV-Vis) were utilized, and photoluminescent spectroscopy (PL) was used to investigate the solvent and concentration effect of the electro-phosphorescent polymers in THF or toluene, and solid film, and which were compared with blend systems to investigate their differences of photophysical properties by various blend systems. The results have showned that we have successfully synthesized the random copolymers of electrophosphorescent polymers by Suzuki Cross coupling reaction of conjugated polymer with Iridium complexes, the emission colors of these polymers are as expected blue, green and red, and their structures are random copolymers. The electrophosphorescent polymers showed exhibit good thermal stability, the 10% weight loss of thermal decomposition temperatures of 10% weight loss are ranging from 322 to 396oC in nitrogen. The POM photographs of the electrophosphorescent polymers were have showned the amorphous structure. The UV-Vis spectra of electrophosphorescent polymers have shown were showed the maximum absorption at 287nm or 340 nm, through the analysis of the PL spectra, as in solution state it is suggested that the main input energy was is mainly absorbed by the conjugated polymers through the solvent and then transfer to the Ir complexes, which were is obviously observed in the THF solution system. To analyze the PL spectra, the characteristic peaks of the Ir complexes were obvious in the THF solution. By contrast On the other hand, the characteristic PL peaks of the Ir complexes were are obviously from in the films as casted by evaporating from the toluene solvent. Accordingly, it is suggested The results of photophysical properties showed that the triplet state of PTPhs was must higher than the triplet state of Ir complex as compared with PF-TPhS.