Pyrene functionalized triphenylamine-based dyes: synthesis, photophysical properties and applications in OLEDs
作者:Yong Zhan、Jiang Peng、Kaiqi Ye、Pengchong Xue、Ran Lu
DOI:10.1039/c3ob41185k
日期:——
Pyrene functionalized triphenylamine-based dyes TP, TCP and TCCP were synthesized via alternate Heck and Wittig reactions. It was found that they could emit strong green light with high fluorescence yields because the formation of the excimer from a pyrene unit was suppressed completely. Moreover, the non-doped organic light-emitting diodes using TP, TCP and TCCP as the emitters as well as the hole-transporting materials were fabricated, and gave green electroluminescence. Notably, the device based on TP exhibited good performance with a low turn-on voltage of 2.80 V, a high maximum luminance of 29 880 cd m−2 at 9.5 V, a high current efficiency of 3.34 cd A−1, and a high power efficiency of 2.67 lm w−1. It suggested that pyrene functionalized triphenylamine derivatives may have applications in non-doped OLEDs.
功能化的芘三苯胺基染料TP、TCP和TCCP通过交替的Heck反应和Wittig反应合成。研究发现,由于芘单元形成的激基态(excimer)被完全抑制,这些染料能够发出强烈的绿色光并具有高荧光产率。此外,使用TP、TCP和TCCP作为发光体和孔传输材料的无掺杂有机发光二极管被制造出来,并产生了绿色电致发光。值得注意的是,基于TP的器件展现出良好的性能,具有低的开启电压2.80 V,在9.5 V时的高最大亮度为29,880 cd m−2,高电流效率为3.34 cd A−1,高功率效率为2.67 lm w−1。这表明功能化的芘三苯胺衍生物在无掺杂OLED中可能具有应用前景。