Efficient simple structure phosphorescent organic light emitting devices with narrow band gap fluorescent hosts

Tae Jin Park; Woo Sik Jeon; Jang Hyuk Kwon

doi:10.1117/12.795645

2 September 2008 Efficient simple structure phosphorescent organic light emitting devices with narrow band gap fluorescent hosts

Tae Jin Park, Woo Sik Jeon, Jang Hyuk Kwon

Author Affiliations +

Proceedings Volume 7051, Organic Light Emitting Materials and Devices XII; 70510R (2008) https://doi.org/10.1117/12.795645
Event: Photonic Devices + Applications, 2008, San Diego, California, United States

Abstract

We present highly efficient red and green phosphorescent devices comprising only two organic layers. Novel host materials having good electron transporting and new narrow band-gap fluorescent characteristics lead to the fabrication of simplified high efficiency devices. The driving voltage value of 3.3 V to reach luminance of 1000 cd/m² is reported in simple bi-layer red and green phosphorescent OLEDs, respectively. The maximum current- and power-efficiency values of 38.30 cd/A and 46.60 lm/W are demonstrated in this green device. The current and power efficiencies of bi-layered red PHOLED are 9.38 cd/A and 11.72 lm/W. Results reveal a practical way to fabricate highly efficient truly bi-layer organic devices for trouble-free manufacturing processes.

Citation Download Citation

Tae Jin Park, Woo Sik Jeon, and Jang Hyuk Kwon "Efficient simple structure phosphorescent organic light emitting devices with narrow band gap fluorescent hosts", Proc. SPIE 7051, Organic Light Emitting Materials and Devices XII, 70510R (2 September 2008); https://doi.org/10.1117/12.795645

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