High performance inverted top-emitting organic light-emitting diodes with enhanced intrinsic quantum yield

Yukun Wu; Runda Guo; Hongbo Wang; Zhensong Zhang; Yi Zhao

doi:10.1117/12.2187245

22 September 2015 High performance inverted top-emitting organic light-emitting diodes with enhanced intrinsic quantum yield

Yukun Wu, Runda Guo, Hongbo Wang, Zhensong Zhang, Yi Zhao

Author Affiliations +

Proceedings Volume 9566, Organic Light Emitting Materials and Devices XIX; 95661S (2015) https://doi.org/10.1117/12.2187245
Event: SPIE Organic Photonics + Electronics, 2015, San Diego, California, United States

Abstract

Inverted top-emitting organic light-emitting diodes (ITOLEDs) with aluminum as cathode and semitransparent silver as anode are investigated. Comparing the blue, green and red ITOLEDs with conventional BEOLEDs based on iridium complex, it is surprising that the red ITOLED exhibits a higher efficiency nearly twice as that of the bottom-emitting counterpart, while blue and green ITOLEDs are comparable to BEOLEDs. We explain that the role of the strong microcavity effect improved the spontaneous emission of emitters in all ITOLEDs, however, only the intrinsic quantum yield of the red emitters is improved due to its comparable radiative and nonradiative decay rates.

Citation Download Citation

Yukun Wu, Runda Guo, Hongbo Wang, Zhensong Zhang, and Yi Zhao "High performance inverted top-emitting organic light-emitting diodes with enhanced intrinsic quantum yield", Proc. SPIE 9566, Organic Light Emitting Materials and Devices XIX, 95661S (22 September 2015); https://doi.org/10.1117/12.2187245

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