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

Xinshun Qin, Yanling He, Chun Ki Tao, Aleksandr Sergeev, Kam Sing Wong, Zhilin Ren, Qiong Liang, Tik Lun Leung, Gang Li, Jasminka Popović, Alan Man Ching Ng, Aleksandra B. Djurišić

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

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 T50).

Original languageEnglish
Pages (from-to)30083-30092
Number of pages10
JournalACS Applied Materials and Interfaces
Volume15
Issue number25
DOIs
Publication statusPublished - 28 Jun 2023

Keywords

  • lead halide perovskite
  • LED
  • lifetime
  • passivation
  • stability

ASJC Scopus subject areas

  • General Materials Science

Fingerprint

Dive into the research topics of 'Effect of Passivating Molecules and Antisolvents on Lifetime of Green Dion-Jacobson Perovskite Light-Emitting Diodes'. Together they form a unique fingerprint.

Cite this