Highly efficient single-layer color-tunable QLEDs enables by the real-time interface exciplex modulation with AgInZnS QDs.

Developing single-pixel color-tunable electroluminescence technology represents a practical approach to circumvent current limitations in pixel processing and longevity. However, existing single-pixel color-tunable quantum dot light-emitting diodes (QLEDs) devices predominantly employ complex tandem structures. Herein, we demonstrate single-layer color-tunable QLEDs by the real-time interface exciplex modulation with AgInZnS (AIZS) quantum dots (QDs). The dynamically color-tunable QLEDs based on green- and red-emitting AIZS QDs exhibit broad spectral coverage, spanning from green to blue, red to yellow, as well as standard white emission. The fabricated devices achieve a leading maximum external quantum efficiency of 5% for quaternary alloy AIZS-based QLEDs. Furthermore, we successfully demonstrate patterned and large-area QLEDs, systematically confirming their significant potential for application in full-color display and lighting technologies.