Emission behavior of dual-side emissive transparent white organic light-emitting diodes

Wing Hong Choi, Hoi Lam TAM, Dongge Ma, Fu Rong ZHU

Research output: Contribution to journalJournal articlepeer-review

14 Citations (Scopus)


White organic light-emitting diodes (WOLEDs) resemble light more naturally, with emission spectrum that is comfortable to the human eye. The transparent WOLEDs can be almost invisible by day and can emit a pleasant diffused light at night, allowing the surface light source to shine in both directions, an exciting new lighting technology that could bring new device concepts. However, undesirable angular-dependent emission in transparent WOLEDs is often observed, due to the microcavity effect. In this work, the emission behavior of dual-side emissive transparent WOLEDs was studied experimentally and theoretically. It is found that avoidance of the overlap between the peak wavelengths of the emitters and the resonant wavelength of the organic microcavity moderates the angulardependent electroluminescence emission behavior, thereby improving the color stability of the transparent white WOLEDs over a broad range of the viewing angle.

Original languageEnglish
Pages (from-to)A471-A479
Number of pages9
JournalOptics Express
Issue number11
Publication statusPublished - 1 Jun 2015

Scopus Subject Areas

  • Atomic and Molecular Physics, and Optics


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