Affiliation:
1. Henan Key Laboratory of Electronic Ceramic Materials and Application, College of Materials Engineering, Henan University of Engineering, Zhengzhou 451191, China
2. Huaibei Yeolight Technology Co., Ltd., Huaibei 235000, China
Abstract
PEDOT:PSS (polyethylene dioxythiophene:polystyrenesulfonate) is a commonly used hole injection layer (HIL) in optoelectronic devices due to its high conductive properties and work function. However, the acidic and hygroscopic nature of PEDOT:PSS can be problematic for device stability over time. To address this issue, in this study we demonstrated the potential of an organic–inorganic hybrid HIL by incorporating solution-processed WOx nanoparticles (WOx NPs) into the PEDOT:PSS mixture. This hybrid solution was found to have a superior hole transport ability and low Ohmic contact resistance contributing to higher brightness (~62,000 cd m−2) and current efficiency (13.1 cd A−1) in the manufactured quantum-dot-based light-emitting diodes (QLEDs). In addition, the resulting devices achieved a relative operational lifetime of 7071 h, or approximately twice that of traditional QLEDs with PEDOT:PSS HILs. The proposed method is an uncomplicated, reliable, and low-cost way to achieve long operational lifetimes without sacrificing efficiency in optoelectronic devices.
Funder
National Natural Science Foundation of China
Program for Science & Technology Innovation Talents in Universities of Henan Province
Excellent Youth Fund of Henan Natural Science Foundation
Natural Science Foundation of Henan Province, China
Scientific Research Foundation of the Higher Education Institutions of Henan Province, China
Henan University of Engineering Foundation, China
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science,General Chemical Engineering