用于高效锡包晶发光二极管的界面分子工程学

IF 6.5 1区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Photonics Pub Date : 2024-10-19 DOI:10.1021/acsphotonics.4c01467

Seok Joo Yang, Dharini Varadharajan, Kagachi Tateno, Yu-Ting Yang, Jeong Hui Kim, Kevin R. Pedersen, Sung-Doo Baek, Hanjun Yang, Aidan H. Coffey, Kenneth R. Graham, Bryan W. Boudouris, Letian Dou

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引用次数: 0

摘要

近年来，过氧化物发光二极管（PeLED）展现出了非凡的潜力，实现了超过 20% 的高外部量子效率（EQE）。然而，这些进展主要集中在可见光颜色上，而且这些器件中使用了铅等有毒元素。锡（Sn）过氧化物具有近 1.3 eV 的窄带隙，是无铅近红外 PeLED 的理想候选材料。然而，锡氧化和快速结晶产生的高缺陷密度仍然是需要克服的障碍。本研究探讨了新合成的乙二氧基噻吩（EDOT）共轭有机配体对锡基珀尔里德发光二极管的影响，旨在通过降低缺陷密度和锡氧化来提高器件性能。经 EDOT 处理的 PeLED 器件实现了 6.4% 的高 EQE，并显示出稳定的电致发光光谱，证明了配体处理在优化锡基 PeLED 方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Interfacial Molecular Engineering for Efficient Sn Perovskite Light-Emitting Diodes

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Interfacial Molecular Engineering for Efficient Sn Perovskite Light-Emitting Diodes

In recent years, perovskite light-emitting diodes (PeLEDs) have demonstrated exceptional potential, achieving high external quantum efficiencies (EQEs) exceeding 20%. However, these advancements have primarily focused on visible colors, and toxic elements such as Pb are used in these devices. Tin (Sn) perovskites with a narrow band gap of nearly 1.3 eV present a promising candidate for lead-free near-infrared PeLEDs. Nonetheless, Sn oxidation and high defect density from fast crystallization are still hurdles to overcome. This study investigates the impact of a newly synthesized ethylenedioxythiophene (EDOT)-based conjugated organic ligand on Sn-based PeLEDs, aiming to enhance device performance by reducing the defect density and Sn oxidation. The EDOT-treated PeLED device achieves a high EQE of 6.4% and exhibits stable electroluminescence spectra, demonstrating the potential of ligand treatments in optimizing Sn-based PeLEDs.

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来源期刊

ACS Photonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

11.90

自引率

5.70%

发文量

438

审稿时长

2.3 months

期刊介绍： Published as soon as accepted and summarized in monthly issues, ACS Photonics will publish Research Articles, Letters, Perspectives, and Reviews, to encompass the full scope of published research in this field.