Fully Solution-Processed Tandem White Quantum-Dot Light-Emitting Diode with an External Quantum Efficiency Exceeding 25%

Citations Over TimeTop 10% of 2018 papers

Abstract

Solution-processed electroluminescent tandem white quantum-dot light-emitting diodes (TWQLEDs) have the advantages of being low-cost and high-efficiency and having a wide color gamut combined with color filters, making this a promising backlight technology for high-resolution displays. However, TWQLEDs are rarely reported due to the challenge of designing device structures and the deterioration of film morphology with component layers that can be deposited from solutions. Here, we report an interconnecting layer with the optical, electrical, and mechanical properties required for fully solution-processed TWQLED. The optimized TWQLEDs exhibit a state-of-the-art current efficiency as high as 60.4 cd/A and an extremely high external quantum efficiency of 27.3% at a luminance of 100 000 cd/m2. A high color gamut of 124% NTSC 1931 standard can be achieved when combined with commercial color filters. These results represent the highest performance for solution-processed WQLEDs, unlocking the great application potential of TWQLEDs as backlights for new-generation displays.

Related Papers

• → Wide Color Gamut Backlight for Liquid Crystal Displays Using Three-Band Phosphor-Converted White Light-Emitting Diodes(2009)180 cited
• → Wide gamut LCD using locally dimmable four‐primary‐color LED backlight(2012)5 cited
• → 46.3: Ultra Wide–Gamut LCD Using a Local Multi–Spectral Backlight(2011)3 cited
• → 3‐2: Invited Paper: A Wide Color Gamut LCD with a Polarized Laser Backlight(2020)4 cited
• → A Nigh-Vision-Compatible LED Backlight for Military Applications(2011)