Bipolar host materials for red and green phosphorescent OLED

Jang Hyuk Kwon; Tae Jin Park; Woo Sik Jeon; Jung Joo Park

doi:10.1117/12.765378

19 November 2007 Bipolar host materials for red and green phosphorescent OLED

Jang Hyuk Kwon, Tae Jin Park, Woo Sik Jeon, Jung Joo Park

Proceedings Volume 6828, Light-Emitting Diode Materials and Devices II; 682802 (2007) https://doi.org/10.1117/12.765378
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

We report novel bipolar host materials for high efficiency red and green phosphorescent OLEDs (PHOLEDs). Phenyl moieties were inserted in a 4,4'-N,N'-dicarbazolebipheyl (CBP) compound to provide much easier electron injection and to increase electron mobility. The efficiency increase and voltage reduction by this modification were observed in red and green PHOLEDs. At a given constant luminance of 1000 cd/m², the power efficiency was enhanced at least by twenty percent in the general red and green PHOLED devices.

Citation Download Citation

Jang Hyuk Kwon, Tae Jin Park, Woo Sik Jeon, and Jung Joo Park "Bipolar host materials for red and green phosphorescent OLED", Proc. SPIE 6828, Light-Emitting Diode Materials and Devices II, 682802 (19 November 2007); https://doi.org/10.1117/12.765378

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