Enhanced optoelectronic performance of blue quasi-2D perovskite light-emitting diodes enabled by diammonium-functionalized spacer

IF 3.6 3区物理与天体物理 Q2 OPTICS Journal of Luminescence Pub Date : 2025-05-01 Epub Date: 2025-02-05 DOI:10.1016/j.jlumin.2025.121124

Chang Tan, Li Song, Zhibo Ge, Yuan Zhang, Ganlu Fan, Xiaowen Hao, Zihan Zong, Yuanqin Xia

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Abstract

Blue perovskite light-emitting diodes (PeLEDs) have showcased remarkable potential for applications in vibrant color displays and solid-state lighting. Particularly, quasi-two-dimensional (quasi-2D) blue PeLEDs exhibit exceptional performance. However, conventional Ruddlesden-Popper (RP) phase quasi-2D perovskites suffer from low energy transfer efficiency and poor stability stemming from the van der Waals gaps between the perovskite layers, which hinder the preparation of high-performance quasi-2D blue PeLEDs. Here, we take advantage of the Dion-Jacobson (DJ) phase perovskite constructed with diammonium ligands to regulate the optical properties and structural stability of RP phase perovskite films. It is found that the mixed RP-DJ phase perovskites exhibit superior thermal stability, higher energy transfer efficiency and higher photoluminescence quantum yield (PLQY) compared to the pure RP phase perovskites. As a result, a sky-blue PeLED with an electroluminescence (EL) peak at 492.4 nm and a maximum external quantum efficiency (EQE) of 11.37 % was achieved.

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利用金刚石功能化间隔剂增强蓝色准二维钙钛矿发光二极管的光电性能

蓝色钙钛矿发光二极管（PeLEDs）在鲜艳的彩色显示器和固态照明方面显示出了显着的应用潜力。特别是，准二维（准二维）蓝色发光二极管表现出优异的性能。然而，传统的Ruddlesden-Popper （RP）相准2d钙钛矿由于钙钛矿层之间存在范德华间隙，导致能量传递效率低，稳定性差，阻碍了高性能准2d蓝色peled的制备。本文利用二铵配体构建的Dion-Jacobson （DJ）相钙钛矿来调控RP相钙钛矿薄膜的光学性质和结构稳定性。结果表明，与纯RP相钙钛矿相比，RP- dj相钙钛矿具有更好的热稳定性、更高的能量传递效率和更高的光致发光量子产率（PLQY）。结果表明，在492.4 nm处获得了电致发光（EL）峰，最大外量子效率（EQE）为11.37%的天蓝色PeLED。

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.