Efficient deep blue electrophosphorescent devices based on platinum(II) bis(n-methyl-imidazolyl)benzene chloride

• Published in: Organic electronics Vol. 13; no. 8; pp. 1430 - 1435
• Main Authors: Fleetham, Tyler, Wang, Zixing, Li, Jian
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.2012; Elsevier
• Subjects: Applied sciences; Blue OLED; Electronics; Exact sciences and technology; Optoelectronic devices; Phosphorescent emitter; Platinum complex; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Blue OLED; Platinum complex; Phosphorescent emitter; Performance evaluation; Transmitter; Quantum yield; Light emitting diode; Low voltage; Platinum; Benzene; High efficiency; Optoelectronic device; Organic light emitting diodes; Chromaticity; Phosphorescence; Blue light; Organic electronics
• ISSN: 1566-1199; 1878-5530
• DOI: 10.1016/j.orgel.2012.03.041

[Display omitted] ► A series of blue-emitting Pt(N^C^N)Cl complexes are synthesized. ► External Quantum Efficiency of 15.7% and CIE coordinates of (0.16,0.13) are achieved. ► Demonstrate deep blue phosphorescent OLEDs using carbazole-based host materials. ► Low efficiency roll-off at high current achieved by efficient charge balance. Highly efficient deep blue phosphorescent light emitting diodes were developed using a newly synthesized series of blue emitting tridentate platinum emitters. Devices employing a cohost of hole and electron transport materials yielded high external quantum efficiencies with low turn on voltage and low efficiency roll off. A maximum EQE of 15.7% and CIE coordinates of (0.16,0.13) was achieved in a device based on platinum(II) bis(N-methyl-imidazolyl)benzene chloride (Pt-16).