Simultaneously enhanced device efficiency, stabilized chromaticity of organic light emitting diodes with lambertian emission characteristic by random convex lenses

Keunsoo Lee, Jonghee Lee, Eunhye Kim, Jeong Ik Lee, Doo Hee Cho, Jong Tae Lim, Chul Woong Joo, Joo Yeon Kim, Seunghyup Yoo, Byeong Kwon Ju, Jaehyun Moon

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

An optical functional film applicable to various lighting devices is demonstrated in this study. The phase separation of two immiscible polymers in a common solvent was used to fabricate the film. In this paper, a self-organized lens-like structure is realized in this manner with optical OLED functional film. For an OLED, there are a few optical drawbacks, including light confinement or viewing angle distortion. By applying the optical film to an OLED, the angular spectra distortion resulting from the designed organic stack which produced the highest efficiency was successfully stabilized, simultaneously enhancing the efficiency of the OLED. We prove the effect of the film on the efficiency of OLEDs through an optical simulation. With the capability to overcome the main drawbacks of OLEDs, we contend that the proposed film can be applied to various lighting devices.

Original languageEnglish
Article number075202
JournalNanotechnology
Volume27
Issue number7
DOIs
Publication statusPublished - 2016 Jan 18

Keywords

  • lateral polymer separation
  • light extraction
  • organic light emitting diodes

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

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