Effect of Passivating Molecules and Antisolvents on Lifetime of Green Dion–Jacobson Perovskite Light-Emitting Diodes

作者：Xinshun Qin, Yanling He, Chun Ki Tao, Aleksandr A. Sergeev, Kam Sing Wong, Zhilin Ren, Qiong Liang, Tik Lun Leung, Gang Li, Jasminka Popović, Alan Man Ching Ng, Aleksandra B. Djurišić · 发表于：ACS Applied Materials & Interfaces · 年份：2023 · DOI：10.1021/acsami.3c02170 · 被引用次数：12 · 研究领域：Perovskite Materials and Applications、Organic Light-Emitting Diodes Research、Conducting polymers and applications

We investigated the influence of two passivating molecules containing a P═O group on the performance of quasi-2D Dion–Jacobson halide perovskite light-emitting diodes, namely, triphenylphosphine oxide (TPPO) and diphenyl-4-triphenylsilylphenyl phosphine oxide (TSPO1). We found that both passivating molecules lead to increased efficiency compared to control devices, while they had opposite effects on device lifetime, with a decrease observed for TPPO and an increase observed for TSPO1. The two passivating molecules resulted in differences in energy-level alignment, electron injection, film morphology and crystallinity, and ion migration during operation. While TPPO resulted in improved photoluminescence decay times, overall higher maximum external quantum efficiency (EQE) and device lifetime were obtained for TSPO1 compared to TPPO (14.4% vs 12.4% EQE, 341 min vs 42 min T 50 ).