中国科学院大学杜鹃团队研究了高效真空沉积纯红色钙钛矿发光二极管的氟改性钝化剂。相关论文于2025年3月10日发表在《光：科学与应用》杂志上。

真空沉积钙钛矿发光二极管（PeLED）在高色域有源矩阵显示器方面显示出巨大的潜力。尽管绿色PeLED发展迅速，但由于真空沉积红光发射材料的光物理性能较差，红色PeLED仍然是一个相当大的挑战。

研究组引入了一种合理设计的氟改性氧化膦添加剂，用于原位钝化真空沉积的钙钛矿。高极性2-F-TPPO掺入的钙钛矿薄膜显示出增强的光致发光量子产率（PLQY）、抑制的缺陷和改善的结晶度。当在PeLED中作为有源层实施时，在640nm的发射波长下实现了12.6%的外部量子效率（EQE），这比之前报道的最有效的真空沉积红色PeLED（EQE低于2%）高6倍。该发现为进一步探索高性能真空沉积PeLED向全彩钙钛矿显示器的发展奠定了基础。

附：英文原文

Title: Fluorine-modified passivator for efficient vacuum-deposited pure-red perovskite light-emitting diodes

Author: Liu, Nian, Liu, Zhengzheng, Huang, Yuanlong, Du, Peipei, Zhang, Xiang, Leng, Yuxin, Luo, Jiajun, Du, Juan, Tang, Jiang

Issue&Volume: 2025-03-10

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 640nm 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.

DOI: 10.1038/s41377-025-01740-1

Source: https://www.nature.com/articles/s41377-025-01740-1