Synthesis and Properties of Polymeric Host Materials Constructed by Silane-carbazole Backbone and Electron-affinitive Cyanohexyl Substituent for Blue Phosphorescence Dopant  

出　　处：《Chemical Research in Chinese Universities》2017年第2期287-293,共7页高等学校化学研究（英文版）

摘　　要：A series of blue phosphor hosts, using 3,6-1inked carbazole with δ-π tetraphenylsilane segment as the mainchain and modified by peripheral cyanohexyl group with different ratios, was designed and synthesized. These poly-mers show good solubility in common organic solvents. They all possess wide bandgap of 3.40 eV, high thermalstabilities and good film forming abilities. The peripheral cyanohexyl substituents have no effect on the polymerbackbones but enhance the electron transporting properties of the polymers in devices. Among them, doped devicesusing poly[（tetraphenylsilicon/9-hexy1-9H-3,6-carbazole）50-co-（tetraphenylsilicon/9-hexanenitrile-9H-3,6-carbazole）]50（PCNCzSi50） as the host and bis[（4,6-difluorophenyl）pyridinato-N, C2]-（picolinato）iridium（Ⅲ）（FIrpic） as the guestshow the best performance with the maximum current efficiency and power efficiency of 2.00 cd/A and 1.40 lm/W,respectively.

关 键 词：CYANO group Host PHOSPHORESCENCE Polymer Wide bandgap 

分 类 号：O[理学]