Recent Advances in OLED Optical Design

Salehi, Amin; Fu, Xiangyu; Shin, Dong‐Hun; So, Franky

doi:10.1002/adfm.201808803

Title: Recent Advances in OLED Optical Design

Journal Article · Fri Feb 08 00:00:00 EST 2019 · Advanced Functional Materials

DOI:https://doi.org/10.1002/adfm.201808803· OSTI ID:1493931

Salehi, Amin ^[1]; Fu, Xiangyu ^[2]; Shin, Dong‐Hun ^[3];

^[2]

Department of Physics North Carolina State University Raleigh NC 27695 USA
Department of Material Science and Engineering North Carolina State University Raleigh NC 27695 USA
Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh NC 27695 USA

Abstract Organic light‐emitting diodes (OLEDs) have become a mainstream display technology in consumer electronics. Self‐emitting ability, transparency, true dark tone, and capability of being made flexible are some of the features of OLED displays, leading to a superior performance compared with liquid crystal displays. In addition to displays, OLEDs are also a strong candidate for lighting applications. Despite great advances in improving the internal quantum efficiency of an OLED to nearly 100%, the external quantum efficiency is still lacking behind due to optical losses. This review reports the latest advances in the optical design of OLEDs that address the external coupling efficiency of OLEDs. Discussed at first are the fundamentals of OLED optics and how the refractive indices of different layers in an OLED stack affect the extraction efficiency. Then, this paper reviews how microlens arrays, scattering layers, and corrugated structures can be used to recover the optical losses and improve the external efficiency, and the general optical designs for different optical structures for light extraction are presented.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: DE‐EE0007624

OSTI ID:: 1493931

Journal Information:: Advanced Functional Materials, Journal Name: Advanced Functional Materials Vol. 29 Journal Issue: 15; ISSN 1616-301X

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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Cited by: 286 works

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