State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, People's Republic of China.
Macromol Rapid Commun. 2011 Sep 15;32(18):1467-71. doi: 10.1002/marc.201100179. Epub 2011 Jul 5.
Novel blue phosphor host, PCNCzSi, using 3,6-linked carbazole with δ-π tetraphenylsilane segment as the main chain modified by peripheral cyanohexyl group was designed. The Si-carbazole backbone entitles the polymer with wide bandgap, high E(T) and good hole transporting ability. The introduction of peripheral CN group with high electron affinity enhances the electron injecting property of the polymer revealed by electron-only device and UPS measurement. Highly efficient spin-coated phosphorescent polymer light-emitting device, using PCNCzSi as the host for blue iridium complex, FIrpic, was realized. The maximum luminous efficiency and maximum external quantum efficiency of the device were 15 cd/A and 6.7%, respectively, which are very high values for blue phosphorescent device using polymers as hosts as known.
新型蓝色荧光体主体 PCNCzSi，采用 3,6-连接咔唑和具有 δ-π 四苯基硅烷片段的主链，通过外围氰基己基进行修饰。硅咔唑主链使聚合物具有宽能带隙、高 E(T)和良好的空穴传输能力。外围 CN 基团的引入具有高电子亲和力，通过电子器件和 UPS 测量证实了聚合物的电子注入性能得到增强。采用旋涂法制备高效的磷光聚合物发光器件，以 PCNCzSi 作为蓝色铱配合物 FIrpic 的主体。器件的最大发光效率和最大外量子效率分别为 15 cd/A 和 6.7%，这对于使用聚合物作为主体的蓝色磷光器件来说是非常高的数值。
