A Spiro [Fluorene-9, 9’-Xanthene]-Based Host Material for Efficient Green and Blue Phosphorescent OLED

Abstract:

A spiro [fluorene-9,9-xanthen-based host material SFX-PF, without possessing conventional hole-or electron-transporting units, has been demonstrated to be host material for efficient and low voltage green phosphorescent organic light-emitting device (PHOLED). This compound showed good thermal stability with high glass transition temperatures (Tg) at 172 °C. The green device exhibited a low turn-on voltage of 3 V, and maximum current efficiency, power efficiency, and external quantum efficiency (EQE) up to 47.9 cd/A, 45.4 lm/W, and 13.2%, respectively. At the luminance level of 1000 cd/m2, the driving voltages are still lower than 4 V with 15.9% roll-off in the EQE. In addition, SFX-PF can also host Fir6 with the blue device exhibiting a low turn-on voltage of 2.8 V and maximum current efficiency, power efficiency, and EQE up to 12.8 cd/A, 11.3 lm/W, and 7.5%, respectively. Based on our present and previous studies, it can be concluded that SFX could serve as a new building block for designing blue and green phosphorescent host materials.

• Periodical: Applied Mechanics and Materials (Volume 331)
• Pages: 503-507
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.331.503
• Online since: July 2013
• Authors: Ye Ren Ni, Hai Quan Su, Wei Huang, Jian Feng Zhao, Yan Qian, Ling Hai Xie, Guo Hua Xie, Yi Zhao
• Keywords: Host Material, Phosphorescent Organic Light-Emitting Diode, Spiro[Fluorene-9,9’-Xanthene]

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