Synthesis and Properties of Bimesitylene Functionalized Materials

• Main Authors: Yuyang Chan, 陳裕元
• Other Authors: Chingyang Liu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/55980530273574914304

碩士 === 中國文化大學 === 應用化學研究所 === 96 === We synthesized a series of OLED materials with bimesitylene as a core, and different groups bonded on C-3 and C-3’ of bimesityl-based compounds by Suziki-coupling and Wittig reaction , six OLED materials found to bring blue emission were prepared: compound 18, 19, 20, 21, 22 and 23. Effect of the the replacement of different groups has on bearing on the molecular organization, wich manifests in a dramatic variation of the luminance maximum, the luminance efficiencies and external quantum efficiencies The UV-vis absorption spectra for these compounds exhibit a band in the range of 310~370 nm, their PL spectra were found to exhibit excellent blue emission with their maximum at 430~455nm. These compounds exhibit amorphous nature, high thermalstability. All devices are non-doped devices, these non-doped devices of 18 and 19 exhibit a saturated blue emission, with a CIE coordinate of y=0.09, all of which are very lose to the standard NTSC blue color. Their luminance maximum are 9848 cd/m2 and 10243 cd/m2, The luminance efficiencies and external quantum efficiencies for the devices of 18 and 19 are 3.04 cd/A and 4.09 %, with 2.88 cd/A and 3.89 %, respectivity. Their performance compares better with most OLED materials. In order to enhance the efficiency, suitable hole-transport materials and electron-transport materials will be added in the devices of other compounds.