Efficient solution-processed near-infrared organic light-emitting diodes with a binary-mixed electron transport layer

被引：0

作者：

Shang, Haowen ^{[1
]}

Yang, Yujie ^{[2
]}

Xue, Bingjie ^{[2
]}

Wang, Yikai ^{[2
]}

Su, Zhiyi ^{[2
]}

Liu, Wenlong ^{[2
]}

Wu, Youzhi ^{[1
]}

Xu, Xinjun ^{[2
]}

机构：

[1] Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China

[2] Beijing Normal Univ, Coll Chem, Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China

来源：

CHINESE CHEMICAL LETTERS | 2025年 / 36卷 / 04期

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

Near-infrared electroluminescence; Organic light-emitting diodes; Electron transport layer; Nonfullerene acceptor; Solution-processing; DEVICES; ELECTROLUMINESCENCE; EMISSION;

D O I：

10.1016/j.cclet.2024.110511

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A binary-mixed electron transport layer (ETL) has been reported for constructing solution-processable near-infrared organic light-emitting diodes (NIR OLEDs). Relative to the single-component ETL, the binarymixed ETL composed of PDINN:TPBi can enhance the carrier transport capacity, reduce device impedance, and weaken fluorescence quenching of the emitting layer. By carefully selecting an appropriate luminescent material Y5 (a nonfullerene electron acceptor in organic solar cells) and precisely fine-tuning the molecular aggregation in active layer using a mixed solvent, the morphology is optimized and luminescence performance is enhanced, resulting in efficient NIR OLEDs with an emission peak at 890 nm. The experiment showcases a Y5-based near-infrared OLED with a maximum radiance of 34.9 W sr-1 m-2 and a maximum external quantum efficiency of 0.50%, which is among the highest values reported for nondoped fluorescent NIR OLEDs with an emission peak over 850 nm. (c) 2025 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

引用

页数：5

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