Enhanced light extraction efficiency in organic light-emitting diode with randomly dispersed nanopattern

Yang Doo Kim, Kyung Hoon Han, Young Hoon Sung, Jung Bum Kim, Hak Jong Choi, Heon Lee, Jang Joo Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

An optical scattering layer composed of randomly dispersed nanopatterns (RDNPs) was introduced in an organic lightemitting diode (OLED) to increase the out-coupling efficiency. An RDNP was fabricated by direct printing on a glass substrate. Owing to its low haze and high transmittance, the RDNP acted as a light extraction layer in the OLED. The RDNP OLEDs showed higher current density and luminance than the reference devices at the same voltage. The current and power efficiencies of the RDNP OLED increased by 25% and 34%, respectively, without electrical degradation. Furthermore, the RDNP devices achieved an external quantum efficiency of 27.5% at 1 mA/cm2.

Original languageEnglish
Pages (from-to)5838-5841
Number of pages4
JournalOptics Letters
Volume40
Issue number24
DOIs
Publication statusPublished - 2015

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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