Microcavity characteristics analysis of micro-shuttered organic light-emitting diodes

Dong Jun Lee, Soo Jong Park, Cheol Hwee Park, Young Wook Park, Byeong Kwon Ju

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    We demonstrated the control of the microcavity (MC) effect in micro-shuttered organic light-emitting diodes (OLEDs) with the introduction of an Ag striped pattern (ASP) layer between the organic layer and the indium zinc oxide layer. The ASP electrodes demonstrated high flexibility, conductivity, and transmittance. The optical and electrical properties of the OLED devices with micro-scale patterned metal electrodes with varying thicknesses and uncovered (open) area:entire glass surface area ratios (open ratios, ORs) were analyzed. The ASP OLEDs demonstrated high color purity and narrowed emission spectra because of the MC effect, increased light extraction by modulating the OR of the micro-shutter structure, and adjustability of the viewing angle distortion by controlling the OR. The ASP OLEDs exhibited maximum efficiency at the OR of 0.3 (Ag thickness; tAg = 15 nm) because of their optimum transmittance and conductivity. The viewing angle distortion decreased by approximately 60.3% with an increase in the OR from 0 to 0.7, as revealed by the changes in the color coordinates. The results showed that when deposited on flexible substrates, ASP electrodes can be used in flexible devices.

    Original languageEnglish
    Article number137643
    JournalThin Solid Films
    Volume692
    DOIs
    Publication statusPublished - 2019 Dec 31

    Bibliographical note

    Publisher Copyright:
    © 2019

    Keywords

    • Metal electrode
    • Micro-shuttered
    • Microcavity
    • Organic light-emitting diode

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Metals and Alloys
    • Materials Chemistry

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