In:
Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 331 ( 2013-7), p. 503-507
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.
Type of Medium:
Online Resource
ISSN:
1662-7482
DOI:
10.4028/www.scientific.net/AMM.331
DOI:
10.4028/www.scientific.net/AMM.331.503
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2013
detail.hit.zdb_id:
2251882-4
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