Highly efficient single-layer color-tunable QLEDs enables by the real-time interface exciplex modulation with AgInZnS
Tianjun Hu1, Xiuting Wu1, Qingsong Shan1
1MIIT Key Laboratory of Advanced Display Materials and Devices, Jiangsu Engineering Research Center for Quantum Dot Display, School of Materials Science and Engineering, Institute of Optoelectronics & Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, China.
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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.
