Peripheral modification of 1,3,5-triazine based electron-transporting host materials for sky blue, green, yellow, red, and white electrophosphorescent devices
Peripheral modification of 1,3,5-triazine based electron-transporting host materials for sky blue, green, yellow, red, and white electrophosphorescent devices
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DOI：
10.1039/c2jm31904g
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
Lee, Chung-Chun
中科院分区：
文献类型：
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作者：
Chen, Hsiao-Fan;Wang, Ting-Chih;Lee, Chung-Chun
报道了具有不同外围基团的星形1，3，5-三嗪基ET型主体（T2 T、3 N-T2 T、3 P-T2 T和oCF 3-T2 T）的物理性质和双重作用（主体和电子传输）应用的系统比较。将N-杂环极性外围引入到1，3，5-三嗪核上对电子注入/传输性质提供了明显的益处，使得具有更简单的器件配置的高效PhOLED可行。在这些主体中，3 P-T2 T可以作为各种Ir基电致磷光器件的有前途的主体和电子传输材料。配置有相同器件结构的这些PhOLED表现出低操作电压，对于天蓝色（FIrpic）、绿色[（PPy）（2）Ir（acac）]、黄色[（Bt）（2）Ir（acac）]、红色[（Mpq）（2）Ir（acac）]和白色[FIrpic + 0.5重量%（Mpq）（2）Ir（acac）]，最大eta（ext）为8%、15.7%、16.9%、16.4%和10.8%，分别
A systematic comparison of the physical properties and the dual-role (host and electron transport) applications of star-shaped 1,3,5-triazine-based ET-type hosts (T2T, 3N-T2T, 3P-T2T, and oCF3-T2T) with differential peripheral groups was reported. The introduction of N-heterocyclic polar peripheries onto a 1,3,5-triazine core gave evident benefits to the electron injection/transport properties, rendering efficient PhOLEDs with a simpler device configuration feasible. Among these hosts, 3P-T2T can serve both as a promising host and electron-transport material for various Ir-based electrophosphorescence devices. These PhOLEDs configured with the same device structure exhibited low operation voltages with a maximum eta(ext) of 8%, 15.7%, 16.9%, 16.4% and 10.8% for sky blue (FIrpic), green [(PPy)(2)Ir(acac)], yellow [(Bt)(2)Ir(acac)], red [(Mpq)(2)Ir(acac)] and white [FIrpic + 0.5 wt% (Mpq)(2)Ir(acac)], respectively.