A Mixed Host Emitting Interlayer Based on CBP:TPBi in Green Phosphorescent Organic Light-Emitting Diodes

作者：Xu, Yao; Zhang, Yu-Ting; Kou, Zhi-Qi^*; Cheng, Shuang; Bu, Sheng-Li

来源：Chinese Physics Letters, 2016, 33(4): 048501.

DOI：10.1088/0256-307X/33/4/048501

• DEVICES

A series of green phosphorescent organic light-emitting diodes based on bipolar -transporting material 4,4'-bis-(carbazol-9-yl) biphenyl (CBP) are prepared. We insert a mixed host emitting interlayer (CBP: electron transporting material 1,3,5-tris (N-phenylbenzimidazole-2y1)) in the middle of the emitting layer, and the best performance appears when x is 2/3. The position of this interlayer can also affect the performance of phosphorescent organic light-emitting diodes. When this interlayer is close to the side of the electron transporting layer, the maximum value of luminance, the current efficiency and the power efficiency are 34090 cd/m(2) at 12 V, 60.6 cd/A and 56.6lm/W, respectively.

• 出版日期2016-4
• 单位上海理工大学