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Updated: May 21, 2025
The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance
Published on: July 4, 2017
Synthesis of highly dispersible TiO2 nanoparticles and their application in quantum dot light emitting diodes
Botao Hu1, Mengxin Liu1, Xinan Shi1
1State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China. xashi@gxu.edu.cn.
Abstract:
Metal oxide nanoparticles are commonly used as electron transport layers (ETLs) in quantum dot light emitting diodes (QLEDs) because of their wide band gap, high electron mobility, and appropriate conduction and valence band positions. Currently, nanoparticulate ZnO is the most successful electron transportation material in high-performance QLEDs. However, the positive aging effect is widely observed for ZnO-based QLEDs, as the instability of amphiprotic ZnO nanoparticles under acidic, basic, and moist conditions limits their applications. In this study, highly dispersible and alcohol-soluble TiO2 nanoparticles are synthesized by using a non-hydrolytic sol-gel method, followed by a dimethyl sulfoxide post-treatment. The use of colloidal TiO2 nanoparticles as an ETL yields optimal QLEDs, with a maximum external quantum efficiency of 12.03%, a highest luminance value of 103 420 cd m-2, and a current efficiency of 18.06 cd A-1. These results reveal that TiO2 nanoparticles hold great potential as ETLs in future QLEDs.
