Suppressing surface plasmon losses to improve the efficiency of blue organic light-emitting diodes using the plasmonic quasi-bandgap phenomenon

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It is a persistent problem in organic light-emitting diode (OLED) display devices that the efficiency of blue-light source materials is lower than that of green- or red-light sourcematerials. To address this problem, numerous studies have investigated blue-light-emitting materials. However, ensuring the reliability of the blue-light-emitting materials has been difficult in most studies. In this study, electrodes using asymmetric dielectric/metal/dielectric structures with plasmonic quasi-bandgap characteristics were developed to achieve a highly efficient blue fluorescent OLED. The electrodes were applied in a microcavity OLED and a transparent OLED. Using the developed electrode in fabricated OLED devices not only maximized the cavity resonance effect and transparency, but also preserved the advantage of the work function of themetal in terms of electrical properties, with high device stability. The approach also minimized losses caused by surface plasmon polaritons, which is a blind spot in the optical aspect of metal electrodes, resulting in improved light extraction efficiency. (C) 2021 Chinese Laser Press
Publisher
CHINESE LASER PRESS
Issue Date
2021-09
Language
English
Article Type
Article
Citation

PHOTONICS RESEARCH, v.9, no.9, pp.1784 - 1795

ISSN
2327-9125
DOI
10.1364/PRJ.418160
URI
http://hdl.handle.net/10203/287760
Appears in Collection
EE-Journal Papers(저널논문)
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