Efficient and Long Lifetime Red InP-Based QLEDs Enabled by Simultaneously Improved Carrier Injection Balance and Depressed Leakage (Advanced Optical Materials 12/2025)

Abstract

Light-Emitting Diodes

Polyvinyl pyrrolidone (PVP) is introduced as an intermediate layer to block excessive electron injection into the InP-based QDs layer while simultaneously reducing leakage current. The optimized device achieves a peak external quantum efficiency (EQE) of 23.5% and a long T₉₅ operational lifetime of over 800 hours at an initial luminance of 1,000 cd m⁻² for red InP-based QLEDs emitting at 624 nm. More details can be found in article 2402677 by Fei Chen, Huaibin Shen, Aiwei Tang, and co-workers.