Pyrene-functionalized carbazole derivatives as non-doped blue emitters for highly efficient blue organic light-emitting diodes
作者:Palita Kotchapradist、Narid Prachumrak、Ruangchai Tarsang、Siriporn Jungsuttiwong、Tinnagon Keawin、Taweesak Sudyoadsuk、Vinich Promarak
DOI:10.1039/c3tc30719k
日期:——
series of pyrene-functionalized carbazole derivatives, namely N-dodecyl-3,6-di(pyren-1-yl)carbazole (CP2), N-dodecyl-1,3,6-tri(pyren-1-yl)carbazole (CP3) and N-dodecyl-1,3,6,8-tetra(pyren-1-yl)carbazole (CP4), are synthesized and characterized as simple non-doped solution processed blue emitters for OLEDs. By multiple substitution of pyrene on the carbazole ring, we are able to retain the high blue emissive
一系列of官能化的咔唑衍生物,即 N-十二烷基-3,6-二(吡啶-1-基)咔唑(CP2),N-十二烷基-1,3,6-三(吡啶-1-基)咔唑(CP3)和N-十二烷基-1,3,6,8-四(吡啶-1-基)咔唑(CP4),被合成并表征为用于OLED的简单的未经掺杂溶液处理的蓝色发射器。通过多次替换芘 在咔唑环上,我们能够保持较高的蓝色发射能力 芘在固体中以及改善材料的无定形稳定性和溶解性。这些材料显示出高的溶液的荧光量子效率(高达94%),并能形成稳定的形态非晶薄膜与Ť克高达170℃。使用这些材料作为未掺杂的蓝色发射器进行溶液处理的双层OLED表现出良好的器件性能,亮度效率高达2.53 cd A -1。他们的多层设备表现出出色的性能。所述CP2为基础的装置显示出低的导通电压(低至2.6 V)具有优异的蓝色发光色(λ EM = 436纳米)和(0.16,0.14)的CIE坐标,而CP3和CP4基于蓝