White organic light-emitting devices with a bipolar transport layer between blue fluorescent and orange phosphorescent emitting layers
Document Type
Article
Publication Date
8-1-2007
Abstract
White organic light-emitting devices based on an orange phosphorescent iridium complex, bis(2-(2-fluorphenyl)-1,3-benzothiozolato- N, C2′) iridium (acetylacetonate) [(F-BT)2 Ir (acac)] and blue fluorescent 4, 4′ -bis(2, 2′ -diphenylvinyl)-1, 1′ -biphenyl are reported. By introducing a bipolar transport 4, 4′ N, N′ -dicarbazole-biphenyl layer between the fluorescent and the phosphorescent emission layers, additional light emission from (F-BT)2 Ir (acac) is observed. The authors attributed it to the elimination of the Dexter energy transfer between the two emitters. Pure white emission with Commission Internationale de I'Eclairage coordinates of (0.33, 0.34) and a maximum luminance of 40960 cd m2 were obtained. The maximum current efficiency and the color rendering index of the device are 13.4 cdA and 71, respectively. © 2007 American Institute of Physics.
Publication Source (Journal or Book title)
Applied Physics Letters
Recommended Citation
Chen, P., Xie, W., Li, J., Guan, T., Duan, Y., Zhao, Y., Liu, S., Ma, C., Zhang, L., & Li, B. (2007). White organic light-emitting devices with a bipolar transport layer between blue fluorescent and orange phosphorescent emitting layers. Applied Physics Letters, 91 (2) https://doi.org/10.1063/1.2757096