Enhancement of outcoupling efficiency of organic light-emitting diodes using a planarized moth-eye structure on glass substrate

Jeong Ho Kim, Lee Mi Do, Je Hong Choi, Jaehoon Park, Heon Lee

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    To improve optical properties of organic light-emitting diodes (OLEDs), we developed a planarized moth-eye structure by ultraviolet nanoimprint lithography (UV-NIL). The moth-eye pattern was fabricated on a glass substrate by UV-NIL using AMONIL polymer resin. It contains nanoscaled, cone-shaped, periodic pattern arrays with a 250 nm diameter and a 550 nm pitch. The glass substrate with the moth-eye structure exhibited a 1%-2% improvement in transmittance of visible wavelengths, but it requires a planarized layer with high-refractive-index materials. Photosensitive titanium precursor resin annealed by UV was used to improve the current efficiency by up to 26% versus conventional OLEDs.

    Original languageEnglish
    Pages (from-to)3773-3775
    Number of pages3
    JournalOptics Letters
    Volume38
    Issue number19
    DOIs
    Publication statusPublished - 2013 Oct 1

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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