High-color-purity and high-efficiency non-doped deep-blue electroluminescent devices based on novel anthracene derivatives
作者:Zhi-Qiang Wang、Chen Xu、Wei-Zhou Wang、Lu-Meng Duan、Zhen Li、Bang-Tun Zhao、Bao-Ming Ji
DOI:10.1039/c2nj20809a
日期:——
Two novel anthracene derivatives 2-tert-butyl-9,10-bis(2-biphenyl) anthracene (TBBPA) and 2-tert-butyl-9,10-bis[2-(1-naphthyl)phenyl]anthracene (TBNPA) were synthesized and characterized. The quantum chemical calculations show that TBBPA and TBNPA have highly non-coplanar structures. Both the two anthracene derivatives exhibit deep-blue emission with high fluorescence quantum yields. The electrochemical properties and energy levels of the two compounds were investigated by cyclic voltammetry. The non-doped devices based on the two anthracene derivatives exhibit low turn-on voltage and stable deep-blue emission with high efficiency (external quantum efficiency of about 3.0%). The Commission Internationale de l'Eclairage (CIE) coordinates (0.15, 0.07) of the devices are very close to the National Television System Committee (NTSC) blue standard. The comprehensive performances of the devices are comparable to the best of the non-doped deep-blue OLEDs with a CIE coordinate of y < 0.10.
合成并表征了两种新型的蒽衍生物:2-叔丁基-9,10-二(2-联苯)蒽(TBBPA)和2-叔丁基-9,10-二[2-(1-萘基)苯基]蒽(TBNPA)。量子化学计算表明,TBBPA和TBNPA具有高度非共面的结构。这两种蒽衍生物均表现出深蓝色发射,且具有高荧光量子产率。通过循环伏安法研究了这两种化合物的电化学性质和能级。基于这两种蒽衍生物的无掺杂器件展现了低启动电压和稳定的深蓝色发射,效率高(外量子效率约为3.0%)。这些器件的国际照明委员会(CIE)坐标(0.15, 0.07)非常接近国家电视系统委员会(NTSC)蓝色标准。器件的综合性能可与最佳无掺杂深蓝OLED的性能相媲美,且其CIE坐标为y < 0.10。