中文摘要：

报道了用m-MTDATA掺杂NPB作复合空穴传输层（c-HTL）的高效率、低电压有机电致发光器件（OLED）,器件的最高发光效率达到了5.3 cd/A,比NPB作HTL的器件（3.4 cd/A）提高了约50%。这是由于c-HTL具有较低的空穴迁移率,改善了发光层中两种载流子的平衡,从而提高了器件性能。进一步在ITO与c-HTL间插入MoOx层,可以减小空穴注入势垒,使得器件在保持较高发光效率（5.1 cd/A）的情况下其驱动电压降低了近1 V,对应的功率效率达到了4.6 lm/W,比未加MoOx层的器件（3.5 lm/W）提高了约30%。

英文摘要：

High-efficiency and low-voltage organic light-emitting device（OLED） with a composite hole transport layer（c-HTL） of m-MTDATA doped into NPB was demonstrated.With Alq3 as the emitting and electron transport layer,the maximum luminous efficiency of OLED using c-HTL reached 5.3 cd/A which was much higher than that（3.4 cd/A） of the device with NPB as HTL.The c-HTL can improve the device efficiency by a factor of ~1.5,which is because the dopant of m-MTDATA（5 wt%） reduced the hole mobility of c-HTL and thereby promoted carrier balance.Moreover,with the incorporation of MoOx between ITO and c-HTL,the driving voltage of the device was reduced by ~1 V as a result of the reduced hole-injection barrier while the luminous efficiency was negligibly affected（5.1 cd/A）.The low voltage contributed to the improved power efficiency of 4.6 lm/W（enhanced by ~30% compared with the device without MoOx layer）,which was even higher in Alq3-based OLED.