P‐9.7: Stable Quantum Dot Light‐Emitting Diodes via Adopting Solution‐Processed All‐Inorganic Heterostructure

Abstract

Quantum dots (QDs) are prominent candidate materials for next‐generation flat‐panel displays and solid‐state lighting. In this study, a strategy of solution‐processed all‐inorganic heterostructure was proposed to overcome the emission efficiency and operation stability issues. Solution‐processed ZnO nanoparticles and NiO are used as the electron transport layer (ETL) and hole transport layer (HIL), respectively. The proposed QLEDs demonstrate improved efficiency to 7.2 cd/A and 5.4 lm/W and good operating stability. Thus, the use of solution processed all‐inorganic charge transport layer (CTL) is a promising and practical approach to realize the high performance, easy‐to‐fabricate, and large area QLEDs.