蓝光发射有机小分子的合成、器件制作及发光性能  

Synthesis,Device Fabrication and Luminescence of a Small Organic Molecule Emitting Blue-Light

作　　者：向能军[1,2] 龚孟濂[2] 梁万里[3] 

机构地区：[1]云南红塔(烟草)集团有限责任公司技术中心,玉溪653100 [2]中山大学光电材料与技术国家重点实验室,化学与化学工程学院,广州510275 [3]香港浸会大学先进发光材料中心,中国香港

出　　处：《应用化学》2008年第1期53-57,共5页Chinese Journal of Applied Chemistry

基　　金：广东省科技计划项目(B10502)

摘　　要：设计并合成了一种具有"双极(bipolar)"性质和发光性能的有机小分子化合物N-苯基-N-(4-(5-(4-联苯基)-1,3,4-噁二唑-2)苯基)苯胺(N-phengyl-N-(4-(5-(4-biphenyl)-1,3,4-oxadiazol-2-yl)phenyl)benzenamine,PBPOPB),用1HNMR,MS和元素分析测试技术进行了表征。研究了化合物的热稳定性和光致发光性质,并用循环伏安法测定了其电化学性能。制作了简单的单层和二层器件,单层器件发射蓝光,亮度达2800 cd/m2。二层器件发射绿光,亮度达16750 cd/m2。结果表明,这种合成的有机化合物同时具备空穴传导和电子输入双重功能,光致、电致发光性能优良,热稳定性好,可作为蓝光发射材料或者作为空穴注入材料制作相应的有机电致发光材料。A novel organic compound substituted with hole transporting arylamine and electron transporting 1, 3,4-oxadiazole moieties was designed and synthesized via facile muhistep reactions with a high yield. The compound is N-phengyl-N- （ 4- （ 5- （ 4-biphenyl ） -1,3,4-oxadiazol-2-yl） phenyl） benzenamine, PBPOPB ）. The compound emits intensive blue light with a high fluorescence quantum yield of 87% under -365 nm light excitation. Cyclic voltammetry results imply the compound has good hole-transporting and electro-transporting properties. TG analysis shows a high heat-stability of the compound. Preliminary study on the electroluminescence of the fluorescent dye prepared via vacuum evaporation indicates that the compound has potential for the production of organic light emitting diodes （OLED）. The maximum luminance for the blue light emitting OLEDs with single layered homojunction reached 2 800 cd/m^2, whereas for double layered heterojunction OLEDs, the best result was more than 16,750 cd/m62. All the results indicate that the synthesized compound with electron-transporting/hole-transporting unit is a good blue light-emitting material and hole-transporting material for fabrication of organic light-emitting diodes.

关 键 词：有机小分子 空穴传导 电子传导 有机电致发光 

分 类 号：O646[理学—物理化学]