Highly efficient pure white phosphorescent organic light-emitting diodes using a deep blue phosphorescent emitting material

• Published in: Organic electronics Vol. 10; no. 4; pp. 681 - 685
• Main Authors: Yook, Kyoung Soo, Jeon, Soon Ok, Joo, Chul Woong, Lee, Jun Yeob, Kim, Myung Seop, Choi, Hong Seok, Lee, Seok Jong, Han, Chang-Wook, Tak, Yoon Heung
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.07.2009; Elsevier
• Subjects: Applied sciences; Compound structure devices; Deep blue phosphorescent device; Electronics; Exact sciences and technology; High efficiency; Optoelectronic devices; Pure white emission; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; 85.60.jb; Pure white emission; Deep blue phosphorescent device; High efficiency; Performance evaluation; High strength current; White light; Sandwich structure; Iridium complex; Pyridine derivatives; Organic light emitting diodes; Optoelectronic device; Chromaticity; Phosphorescence; Organic electronics
• ISSN: 1566-1199; 1878-5530
• DOI: 10.1016/j.orgel.2009.02.023

A high efficiency pure white phosphorescent organic light-emitting diode was developed by combining a deep blue emitting phosphorescent dopant material with red/green phosphorescent emitting materials. A simple stack structure of blue/red:green was used and tris((3,5-difluoro-4-cyanophenyl)pyridine) iridium was used as a deep blue emitting phosphorescent dopant. A pure white emission with a color coordinate of (0.29, 0.31) and a very high current efficiency of 28 cd/A was obtained after managing the device architecture of the all phosphorescent white devices.