Enhanced Performance of ZnO-Based Deep Red Perovskite Light-Emitting Diodes through Polyethylenimine Ethoxylated/1- Aminopyridinium Iodide Dual-Function Modification Layer

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2025-04-29 DOI:10.1021/acs.jpclett.5c00781

Ruoyan Wang, Kaiming Liu, Luman Jiang, Mengmeng Li, Diwei Zhang, Yuan Lin, Xiaozhen Li, Yu Cao, Jianpu Wang

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Abstract

Deep red perovskite light-emitting diodes (LEDs) based on a zinc oxide (ZnO) electron transporting layer (ETL) have achieved great improvement in recent years. Polyethylenimine ethoxylated (PEIE) is widely employed as a modification layer for ZnO in deep red perovskite LEDs to address the interfacial reaction between ZnO and perovskites. However, there is a lack of research on the regulation of the PEIE properties. In this work, we design a dual-function modification layer of PEIE doped with 1-aminopyridinium iodide (PyNI) to achieve improved energy level alignment and enhanced perovskite film quality. As a result, the deep red perovskite LEDs with a PEIE/PyNI dual-function modification layer exhibit a peak external quantum efficiency of 17.5%, a brightness of 1644 cd m^–2, and extended operational stability (T₅₀ = 8.3 h at 20 mA cm^–2). These advancements highlight the critical role of ZnO surface modification in achieving high-performance ZnO-based deep red perovskite LEDs.

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聚乙烯亚胺乙氧基化/1-氨基碘化吡啶双功能修饰层增强zno基深红色钙钛矿发光二极管性能

基于氧化锌电子传输层（ETL）的深红色钙钛矿发光二极管（led）近年来取得了很大的进步。聚乙烯亚胺乙氧基化（PEIE）被广泛用作深红色钙钛矿led中ZnO的修饰层，以解决ZnO与钙钛矿之间的界面反应。然而，对PEIE性能调控的研究还很缺乏。在这项工作中，我们设计了一种掺杂1-氨基碘化吡啶（PyNI）的双功能修饰层，以实现改进的能级排列和增强的钙钛矿膜质量。结果表明，具有PEIE/PyNI双功能修饰层的深红色钙钛矿led的峰值外量子效率为17.5%，亮度为1644 cd m-2，并且扩展了工作稳定性（T50 = 8.3 h, 20 mA cm-2）。这些进展突出了ZnO表面改性在实现高性能ZnO基深红色钙钛矿led中的关键作用。

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.