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Electrodos DMD nanoimpresos que permiten OLEDs de visualización bidireccional con emisión cuasi Lambertiana
Ningning Song1, Ningning Liang1, Xinghao Guo1
1School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|March 2, 2026
Resumen
Los investigadores desarrollaron nuevas pantallas bidireccionales (BV-OLED) que superan las compensaciones de transparencia y brillo. Su novedoso enfoque mejora la emisión de luz equilibrada, allanando el camino para dispositivos electrónicos transparentes y plegables avanzados.
Área de la Ciencia:
- Materials Science; Optoelectronics; Display Technology
Sus antecedentes:
- Bidirectional displays offer advanced applications but face challenges with transparency, brightness, and emission balance.; Existing bidirectional viewing organic light-emitting diodes (BV-OLEDs) suffer from inherent limitations hindering widespread adoption.
Objetivo del estudio:
- To develop a novel strategy for simultaneously improving and balancing bidirectional emission in OLEDs.; To overcome the trade-off between transparency and brightness in bidirectional displays.; To achieve a quasi-Lambertian light distribution for enhanced viewing angles.
Principales métodos:
- Implemented a dual-approach strategy combining microcavity resonance enhancement with nano-patterned structures.; Utilized a dielectric/metal/dielectric (DMD) capping layer to improve top electrode transmittance.; Engineered nanoimprinted DMD electrodes to suppress surface plasmon and waveguide modes.
Principales resultados:
- Achieved an 89.7% enhancement in electrode transmittance (33.9% to 64.3%).; Demonstrated balanced bidirectional emission (33% to 42%) with a 67.3% total brightness increase.; Exhibited enhanced transparency with near-zero haze, a quasi-Lambertian pattern, and stable color across 120° viewing angles.
Conclusiones:
- The developed dual-approach strategy effectively addresses key limitations in BV-OLEDs.; This breakthrough provides a fundamental design framework for next-generation transparent and flexible bidirectional displays.; The optimized BV-OLEDs show significant potential for applications in retail, signage, and foldable devices.
