Fluorine-modified Passivator for Efficient Vacuum-deposited Pure-red Perovskite Light-emitting Diodes

Overview

Journal Light Sci Appl

Publisher Springer Nature

Date 2025 Mar 10

PMID 40059181

Authors

Nian Liu

Zhengzheng Liu

Yuanlong Huang

Peipei Du

Xiang Zhang

Yuxin Leng

Jiajun Luo

Juan Du

Jiang Tang

Affiliations

Soon will be listed here.

Abstract

Vacuum-deposited perovskite light-emitting diodes (PeLEDs) have demonstrated significant potential for high-color-gamut active-matrix displays. Despite the rapid advance of green PeLEDs, red ones remain a considerable challenge because of the inferior photophysical properties of vacuum-deposited red-light-emitting materials. Here, a rationally designed fluorine-modified phosphine oxide additive was introduced to in-situ passivate vacuum-deposited perovskites. The highly polar 2-F-TPPO incorporated perovskite films demonstrated enhanced photoluminescence quantum yield (PLQY), suppressed defects, and improved crystallinity. When implemented as active layers in PeLEDs, an external quantum efficiency (EQE) of 12.6% with an emission wavelength of 640 nm is achieved, which was 6 times higher compared to the previously reported most efficient vacuum-deposited red PeLEDs (EQE below 2%). Our findings lay the foundations for the further exploration of high-performance vacuum-deposited PeLEDs toward full-color perovskite displays.

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