Weak-microcavity organic light-emitting diodes with improved light out-coupling

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We propose and demonstrate weak-microcavity organic light-emitting diode (OLED) displays with improved light-extraction and viewing-angle characteristics. A single pair of low-and high-index layers is inserted between indium tin oxide (ITO) and a glass substrate. The electroluminescent (EL) efficiencies of discrete red, green, and blue weak-microcavity OLEDs are enhanced by 56%, 107%, and 26%, respectively, with improved color purity. Moreover, full-color 128 x 160 passive-matrix bottom-emitting OLED displays are fabricated by employing low-index layers of two thicknesses. As a display, the EL efficiency of white color was 27% higher than that of a conventional OLED display. (c) 2008 Optical Society of America.
Publisher
OPTICAL SOC AMER
Issue Date
2008-08
Language
English
Article Type
Article
Keywords

ELECTROLUMINESCENT DIODES; EFFICIENCY; EMISSION; DEVICES; ENHANCEMENT; EXTRACTION

Citation

OPTICS EXPRESS, v.16, no.17, pp.12632 - 12639

ISSN
1094-4087
URI
http://hdl.handle.net/10203/20092
Appears in Collection
PH-Journal Papers(저널논문)
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