文献类型：期刊文献

英文题名：Balancing Charge Injection via a Tailor-Made Electron-Transporting Material for High Performance Blue Perovskite QLEDs

作者：Yuan, Shichen[1];Fang, Tao[1];Huang, Jing[6];Li, Xiansheng[1];Wei, Changting[1];Zhou, Yihui[1];Li, Yan[1];Zheng, Xin[1];Huang, Jinhai[2,3];Su, Jianhua[2,3];Baryshnikov, Glib[4];Choy, Wallace C. H.[5];Zeng, Haibo[1];Xu, Bo[1]

机构：[1]Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, MIIT Key Lab Adv Display Mat & Devices, Nanjing 210094, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Ctr, Shanghai 200237, Peoples R China;[4]Linkoping Univ, Dept Sci & Technol, Lab Organ Elect, S-60174 Norrkoping, Sweden;[5]Univ Hong Kong, Dept Elect & Elect Engn, Hong Kong, Peoples R China;[6]Nanjing Univ Sci & Technol, Sch Environm & Biol Engn, Nanjing 210094, Peoples R China

年份：2023

卷号：8

期号：1

起止页码：818

外文期刊名：ACS ENERGY LETTERS

收录：;EI(收录号：20230313387361);WOS:【SCI-EXPANDED(收录号:WOS:000919693100001)】；

基金：This work was supported by National Natural Science Foundation of China (No. 22279059, 52131304), the Fundamental Research Funds for the Central Universities (No. 30921011106), the start-up funding from the Nanjing University of Science and Technology (NJUST) and the Research Innovation Program of Nanjing Overseas Returnees (No. AD411025). The authors are also thankful for the support from the NJUST Large Instrument Equipment Open Fund, and Vacuum Interconnect Nano X Research Facility (NANO-X) of Suzhou Institute of Nano-Tech and Nano-Bionics, CAS. G.B. acknowledges support from the Swedish Research Council (Starting Grant No. 2020-04600), the Swedish National Infrastructure for Computing (SNIC 20225-103) at the National Supercomputer Centre of Linkoping University (Sweden) partially funded by the Swedish Research Council through Grant Agreement No 2018-05973, and the funding in the frame of the program SMART-ER Seed Project.

语种：英文

外文关键词：Electron mobility - Electrons - Organic light emitting diodes (OLED) - Semiconductor quantum dots - Supercomputers

摘要：One of the great challenges in perovskite quantum dot light-emitting diodes (Pe-QLEDs) is the unbalanced charge injection that significantly hinders the device performance and stability. Herein, we tailor-made a high mobility electron-transporting material (ETM), named B2, to balance the carrier injection in blue Pe-QLEDs. B2 with a tailored asymmetric anthracenyl structure exhibits a promising electron mobility of 2.7 x 10(-4) cm(2)center dot V-1 center dot s(-1), which is almost 20 times higher than the commonly used ETM-TPBi (1.1 x 10(-5) cm(2)center dot V-1 center dot s(-1)). Subsequently, sky blue (490 nm) Pe-QLED with B2 as the ETM presented a remarkably high external quantum efficiency (EQE) of 13.17% and a low turn-on voltage of 2.2 V, which is much better than that of the TPBi-based device (EQE of 8.31% and Vturn-on of 3.2 V). In addition, B2 also demonstrated a universal application in green and deep blue Pe-QLEDs. This work provides an important guidance to rational design of high electron mobility ETMs for high-performance LEDs.