Organic light emitting diode with uniform luminance distribution and enhanced efficiency via random embossing structure

Keunsoo Lee, Jonghee Lee, Chul Woong Joo, Joo Yeon Kim, Doo Hee Cho, Jeong Ik Lee, Hye Yong Chu, Jaehyun Moon, Byeong Kwon Ju

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Using the lateral phases separation of a binary immiscible polymer blend, we have fabricated a random embossing structure (RES). The RES was investigated as a potential structure for organic light-emitting diode (OLED) light extraction. Our RES yields uniform light extraction in a broad angle (0°∼70°) range with spectral stability. Blue phosphorescence OLEDs equipped with the RES showed an enhancement of 20% in external quantum efficiency (EQE)and spectral stability within Δx,y < 0.01 in a viewing angle range of 0°∼70°. Our RES provides a new and practical approach for achieving enhanced efficiency and spectral stability of OLEDs.

Original languageEnglish
Pages (from-to)Q56-Q59
JournalECS Solid State Letters
Volume3
Issue number11
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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