通过ZnO纳米颗粒的溶剂优化策略制备的高性能蓝色量子点发光二极管

High-Performance Blue Quantum Dot Light Emitting Diode via Solvent Optimization Strategy for ZnO Nanoparticles.

作者信息

Xu Ji, Wang Lixi, Zhao Xueliang, Shi Yutong, Shi Yongjiao, Liu Ting

机构信息

School of Electronic and Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China.

Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China.

出版信息

Nanomaterials (Basel). 2021 Apr 9;11(4):959. doi: 10.3390/nano11040959.

DOI:10.3390/nano11040959

PMID:33918667

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8070000/

Abstract

Here, we report on the high-performance blue quantum dots (QDs) light-emitting diodes (QLEDs), in which the ZnO nanoparticles (NPs) are employed as the electron transport layer (ETL) and optimized with different alcohol solvents. The experimental results demonstrate that the properties of solvent used for ZnO NPs-such as polarity, viscosity and boiling point-play a crucial role in the quality of film where they modulate the electron injection across the QDs/ETL interface. The maximum current efficiency of 3.02 cd/A and external quantum efficiency (EQE) of 3.3% are achieved for blue QLEDs with ZnO NPs dispersed in butanol, exhibiting obvious enhancement compared with the other solvents. This work provides a new method to select proper solvent for ETL which can further improve the device performance.

摘要

在此，我们报道了高性能蓝色量子点（QDs）发光二极管（QLEDs），其中氧化锌纳米颗粒（NPs）被用作电子传输层（ETL），并使用不同的醇类溶剂进行优化。实验结果表明，用于氧化锌纳米颗粒的溶剂性质——如极性、粘度和沸点——在薄膜质量中起着关键作用，它们调节着电子穿过量子点/电子传输层界面的注入。对于分散在丁醇中的氧化锌纳米颗粒的蓝色QLEDs，实现了3.02 cd/A的最大电流效率和3.3%的外量子效率（EQE），与其他溶剂相比有明显提高。这项工作提供了一种为电子传输层选择合适溶剂的新方法，可进一步提高器件性能。