文献类型：期刊文献

英文题名：Highly efficient tandem OLED based on a novel charge generation layer of HAT-CN/CuPc heterojunction

作者：Chang, Qian[1];Lu, Zhaoyue[1];Yin, Yuehong[2];Xiao, Jing[3];Wang, Junling[4]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]Henan Polytech Univ, Sch Phys & Elect Informat Engn, Jiaozuo 454000, Peoples R China;[3]Taishan Univ, Phys & Elect Engn Coll, Tai An 271021, Shandong, Peoples R China;[4]Army Acad Armored Forces, Basic Dept, Beijing 100072, Peoples R China

年份：2022

卷号：75

外文期刊名：DISPLAYS

收录：;EI(收录号：20224012836824);WOS:【SCI-EXPANDED(收录号:WOS:000873918700002)】；

基金：This work was supported by the National Natural Science Foundation of China (61574098) and Shandong Province Key R & D Program of China (2019GGX101016) .

语种：英文

外文关键词：Tandem organic light -emitting diodes; Charge generation layer; Organic heterojunction; HAT-CN; CuPc

摘要：A novel non-doped organic heterojunction (OHJ) composed of HAT-CN and CuPc is proposed to be charge generation layers (CGL) for constructing high efficiency tandem organic light-emitting diodes (OLEDs). The highest current efficiency and external quantum efficiency (EQE) of tandem device with this CGL are 46.3 cd/A and 15.1%, which are 125% and 107% higher than those of single emissive unit OLED, respectively. Further-more, the tandem device provides better stability. The efficiency roll-off from the maximum to 1000 cd/m2 is 7.2% for the tandem device, which delivers a great improvement compared to that of single emissive unit OLED (21.9%). And CuPc thickness in CGLs merely slightly affects the device performance, because of the tradeoff between improved charge injection and declined transmittance with the increase of the CuPc thickness. The experimental results demonstrate that the organic heterojunction consisting of HAT-CN/CuPc is a feasible CGL for developing high performance tandem OLEDs.