High-performance solution-processed OLEDs utilizing a nonplanar terdentate chloroplatinum emitter

IF 9.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Science China Chemistry Pub Date : 2025-03-13 DOI:10.1007/s11426-024-2582-3

Si-Hai Wu, Jian-Cheng Chen, Zhe Zhang, Ren-Hui Zheng, Hui-E. Peng, Zifeng Zhao, Dian-Xue Ma, Zhong-Qiu Li, Jiang-Yang Shao, Yu-Wu Zhong

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引用次数: 0

Abstract

Platinum complexes are one of the most promising emitters for organic light-emitting diodes (OLEDs) and they have been studied for decades. However, it is still challenging to realize high-performance solution-processed OLEDs by using the platinum complex as an emissive dopant. Herein, a nonplanar terdentate [Pt(N^C^N)Cl] emitter (Pt1) with good solubility and film-forming ability, ultrahigh photoluminescence quantum yield (98% in PMMA film), and short excited-state lifetime (1.5 µs in solution) is presented to achieve this goal. This complex is designed and synthesized by using a nonplanar ligand strategy. Solution-processed OLEDs of Pt1 are successfully fabricated to show a maximum external quantum efficiency (EQE_max) of 16.14%, a maximum current efficiency (CE_max) of 46.36 cd A⁻¹, a maximum luminance (L_max) of 13990 cd m⁻², and operating half-lifetime (LT₅₀) of 288 min, respectively, representing the highest performance recorded so far based on the terdentate platinum complexes. More importantly, the large-area (144 mm²) OLEDs of Pt1 with high EQE_max of 10.28% and uniform luminance of 8076 cd m⁻² have been achieved, indicating a high potential of Pt1 for commercial applications.

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利用非平面三齿氯铂发射极的高性能溶液处理oled

铂配合物是有机发光二极管（oled）中最有前途的发射体之一，人们对其进行了数十年的研究。然而，利用铂配合物作为发射掺杂剂来实现高性能的溶液处理oled仍然具有挑战性。本文提出了一种具有良好溶解度和成膜能力、超高光致发光量子产率（在PMMA薄膜中为98%）和短激发态寿命（在溶液中为1.5µs）的非平面三元齿状[Pt(N^C^N)Cl]发射极（Pt1）。该配合物采用非平面配体策略设计合成。Pt1溶液处理oled的最大外量子效率（EQEmax）为16.14%，最大电流效率（CEmax）为46.36 cd a−1，最大亮度（Lmax）为13990 cd m−2，工作半衰期（LT50）为288 min，是迄今为止基于三齿状铂配合物记录的最高性能。更重要的是，Pt1的大面积（144 mm2） oled具有10.28%的高EQEmax和8076 cd m−2的均匀亮度，表明Pt1具有很高的商业应用潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.