Abstract In this research, we have investigated the charge generation and electron injection processes in charge generation unit (CGU) consisting of CsN3-doped Bis-4, 6-(3, 5-di-3-pyridylphenyl)-2-methylpyrimi-dine (CsN3:B3PYMPM)/Al/1, 4, 5, 8, 9,… Click to show full abstract
Abstract In this research, we have investigated the charge generation and electron injection processes in charge generation unit (CGU) consisting of CsN3-doped Bis-4, 6-(3, 5-di-3-pyridylphenyl)-2-methylpyrimi-dine (CsN3:B3PYMPM)/Al/1, 4, 5, 8, 9, 11-Hexaazatriphenylene-hexacarbonitrile (HAT-CN). By employing this CGU, a high-efficiency phosphorescent tandem device achieving best efficiencies of 164.3 cd/A, 46.51% and 109.8 lm/W has been realized. Particularly, in addition to the improvement in current efficiency by more than two times, the tandem device has better power efficiency compared to the corresponding single-unit device at the same current density. Simultaneously, an efficient tandem white OLED showing high color stability and warm white emission over a wide range of luminance has been also fabricated.
Journal Title: Organic Electronics
Year Published: 2018
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