Highly efficient p-i-n white organic light emitting devices with tandem structure

Meng Huan Ho*, Teng-Ming Chen, Pu Cheng Yeh, Shiao Wen Hwang, Chin H. Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Scopus citations

Abstract

Highly efficient tandem p-i-n white organic light emitting devices have been fabricated. Utilizing an optical transparent bilayer with doped organic p-n junction that consists of 4,7-diphenyl-1,10-phenanthroline: 2% cesium carbonate (Cs2 C O3) N, N′ -bis(1-naphthyl)- N, N′ -diphenyl- 1, 1′ -biphenyl- 4, 4′ -diamine: 50% v/v tungsten oxide (W O3) as the connecting layer, the tandem p-i-n white device achieved an electroluminescence efficiency of 23.9 cdA and a power efficiency of 7.8 lmW at 20 mA cm2 with a Commission Internationale de l'Eclairage coordinates of (0.30, 0.43). The electroluminescent color of this tandem p-i-n white organic light-emitting diode device will not change significantly with respect to drive current variation and forward viewing angle.

Original languageEnglish
Article number233507
JournalApplied Physics Letters
Volume91
Issue number23
DOIs
StatePublished - 14 Dec 2007

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