Extremely high efficiency phosphorescent organic light-emitting diodes with horizontal emitting dipoles

Kwon-Hyeon Kim; Chang-Ki Moon; Jeong-Hwan Lee; Jang-Joo Kim

doi:10.1117/12.2062527

8 October 2014 Extremely high efficiency phosphorescent organic light-emitting diodes with horizontal emitting dipoles

Kwon-Hyeon Kim, Chang-Ki Moon, Jeong-Hwan Lee, Jang-Joo Kim

Proceedings Volume 9183, Organic Light Emitting Materials and Devices XVIII; 918326 (2014) https://doi.org/10.1117/12.2062527
Event: SPIE Organic Photonics + Electronics, 2014, San Diego, California, United States

Abstract

We present the factors influencing the orientation of the phosphorescent dyes in phosphorescent OLEDs. And, we report that an OLED containing a phosphorescent emitter with horizontally oriented dipoles in an exciplex-forming co-host that exhibits an extremely high EQE of 32.3% and power efficiency of 142 lm/W, the highest values ever reported in literature. Furthermore, we experimentally and theoretically correlated the EQE of OLEDs to the PL quantum yield and the horizontal dipole ratio of phosphorescent dyes using three different dyes.

Citation Download Citation

Kwon-Hyeon Kim, Chang-Ki Moon, Jeong-Hwan Lee, and Jang-Joo Kim "Extremely high efficiency phosphorescent organic light-emitting diodes with horizontal emitting dipoles", Proc. SPIE 9183, Organic Light Emitting Materials and Devices XVIII, 918326 (8 October 2014); https://doi.org/10.1117/12.2062527

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