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Novel Bipolar Host Materials Based on 1,3,5-triazine Derivatives for Highly Efficient Phosphorescent OLEDs With Extremely Low Efficiency Roll-Off

Novel Bipolar Host Materials Based on 1,3,5-triazine Derivatives for Highly Efficient Phosphorescent OLEDs With Extremely Low Efficiency Roll-Off

Xiao-Ke Liu, Cai-Jun Zheng, Jing Xiao, Jun Ye, Chuan-Lin Liu, Sui-Dong Wang, Wei-Ming Zhao, Xiao-Hong Zhang

Phys Chem Chem Phys. 2012 Nov 7;14(41):14255-61.

PMID: 22936367

Abstract:

Recently, bipolar host materials have attracted considerable attention because they can achieve balanced charge injection/transport in phosphorescent organic light emitting diodes (PhOLEDs) and consequently obtain excellent device performance. In this work, two bipolar host materials, namely, 3-(4,6-diphenyl-1,3,5-triazin-2-yl)-9-phenyl-9H-carbazole (DPTPCz) and 3-(4,6-diphenoxy-1,3,5-triazin-2-yl)-9-phenyl-9H-carbazole (DPOTPCz), have been designed, synthesized and characterized. With high triplet energy levels of 2.78 and 2.86 eV for DPTPCz and DPOTPCz, respectively, two compounds are considered promising bipolar host materials for PhOLEDs. Blue and green PhOLEDs based on these two new compounds show excellent performances. The phosphorescent devices based on DPTPCz exhibit maximum external quantum efficiencies of 14.4% (for blue device) and 21.2% (for green device), and maintain high efficiencies of 11.9% and 20.0% even at a high luminance of 10,000 cd m(-2).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1313391579	DPTPCz		1313391-57-9	Price

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