Enhance the Light Extraction Efficiency of QLED with Surface Micro-Nanostructure
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Quantum dot light-emitting diodes (QLEDs) are usually a flat multilayer structure.
The luminous efficiency of QLEDs is limited because the light extraction is constrained owing to the substrate mode at the air/substrate interface, the waveguide mode at the conductive glass/organic interface, and the surface plasmon polaritons (SPPs) along the metal/organic interface.
To improve the light extraction for the luminous efficiency of QLEDs, light transmission through the QLEDs coupled with three different surface micro-nanostructures is simulated by using a ray-tracing method.
Furthermore, QLEDs (red, green, and blue emission) coupled with micro-nanostructures are also fabricated to investigate the influence of the micro-nanostructures on the luminous efficiency.
Our simulation results show that more light escapes from the QLEDs coupled with surface micro-nanostructures than the control devices without micro-nanostructures.
Our experimental results are consistent with the simulation results.
By coupling with surface micro-nanostructures, the luminous efficiencies of the devices exhibited great improvement, and the EQE of R/G/B trichromatic reached 17.3%, 2.81%, and 10%, respectively, which are about 1~2 times higher than those of the control devices without any surface structure.
Our results should make a contribution to building a strategy for improving the luminous efficiency of QLEDs.
American Psychological Association (APA)
Liu, Zilei& Li, Feng& Huang, Gaoxiang& Wei, Jiahu& Jiang, Guangyu& Huang, Yan. 2020. Enhance the Light Extraction Efficiency of QLED with Surface Micro-Nanostructure. Journal of Nanomaterials،Vol. 2020, no. 2020, pp.1-11.
Modern Language Association (MLA)
Liu, Zilei…[et al.]. Enhance the Light Extraction Efficiency of QLED with Surface Micro-Nanostructure. Journal of Nanomaterials No. 2020 (2020), pp.1-11.
American Medical Association (AMA)
Liu, Zilei& Li, Feng& Huang, Gaoxiang& Wei, Jiahu& Jiang, Guangyu& Huang, Yan. Enhance the Light Extraction Efficiency of QLED with Surface Micro-Nanostructure. Journal of Nanomaterials. 2020. Vol. 2020, no. 2020, pp.1-11.
Includes bibliographical references
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