Blue organic light-emitting diodes based on pyrazoline phenyl derivative

• Main Authors: Stakhira, P., Khomyak, S., Cherpak, V., Volyniuk, D., Simokaitiene, J., Tomkeviciene, A., Kukhta, N. A., Grazulevicius, J. V., Kukhta, Alexander V., Hotra, Z., Voznyak, L., Demir, Hilmi Volkan, Sun, Xiaowei
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/96577; http://hdl.handle.net/10220/10345
• Institution: Nanyang Technological University

The results of an experimental study of the electroluminescent device made of ITO/CuI/2,6-di-tert.-butyl-4-(2,5-diphenyl-3,4-dihydro-2H-pyrazol-3-yl)-phenol (HPhP)/3,6-Di(9-carbazolyl)-9-(2-ethylhexyl) carbazole (TCz1)/Ca:Al with efficacy up to 10.63 cd/A are presented. HPhP provides blue emission with a peak wavelength at 445 nm. The layer of TCz1 acts as an electron-transporting layer. In the framework of density functional theory (DFT) approach the geometry configuration and energy levels of HPhP are found being in a good agreement with spectral and cyclic voltammogram data.