Surface wrinkle formation by liquid crystalline polymers for significant light extraction enhancement on quantum dot light-emitting diodes

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We propose an optimal outcoupling structure of a quantum-dot light-emitting diode (QLED) and present material properties based on numerical calculations via the ray-tracing method, in which light extraction properties are obtained according to the surface wrinkles on a substrate. After analyzing the designed microstructure elements, the optimal model was derived and applied to the QLEDs; consequently, the outcoupling efficiency enhanced by 31%. The liquid crystalline polymer forming the random surface wrinkles not only achieves an excellent light extraction through plasma crosslinking but also facilitates large-area processes. We propose an optical design rule for high-efficiency QLED design by analyzing the electro-optical efficiency, emission spectrum, and angular radiation pattern of the optical device.
Publisher
OPTICAL SOC AMER
Issue Date
2020-08
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.28, no.18, pp.26519 - 26530

ISSN
1094-4087
DOI
10.1364/OE.401328
URI
http://hdl.handle.net/10203/276503
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
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