咪唑及吡咯兩系列化合物之合成、性質探討 及其在藍色磷光有機發光二極體之初步探討

Abstract

本篇論文合成了咪唑、吡咯兩種不同系列之雙偶極化合物，探討其熱穩定性、能量轉移之行為、光物理及電化學性質，其中將咪唑系列之化合物3、6作為主發光體材料，摻混市售藍色磷光發光材料—FIrpic，製成有機電激發光二極體元件，其中以化合物3表現較好，在電荷密度20 mA/cm2時的操作電壓8.05 V為驅動電壓，亮度1869 cd/m2；操作電壓4.5V時可達最大發光效率29.32 cd/A，4.0 V時達最大發光功率21.34 lm/W，最大外部量子效率為10.81%；而吡咯系列化合物在電化學方面具有電聚合及電制變色之潛力，已初步探討這一系列化合物在電化學之表現行為。

Two series of bipolar imidazole and pyrrole compounds have been synthesized. The thermal stability,energy transfer, photophysics and electrochemical properties were investigated. The bipolar imidazole compound 3 and 6 as the new host materials for blue phosphorescent organic light emitting diodes (OLED). The device with the host of compound 3 and the guest of FIrpic exhibited the turn on voltage at 20 mA/cm2 of 8.05 V, luminance of 1869 cd/m2, max current efficiency of 29.32 cd/A at 4.5 V, power efficiency of 21.34lm/W at 4.0 V and the external quantum efficiency of 20.18 %. On the other hand, the pyrrole compounds have potential for electrochemical polymerization and the electrochromic mechanism has been studied.