摘要Efficient blue small molecular phosphorescent light-emitting diodes with a blue phosphorescent dyebis(3,5-difluoro-2-(2-pyridyl)-phenyl-(2-carboxypride) iridium (III) (FIrpic) doped into a novel small-molecule host 9,9-bis[4-(3,6-di-tert-butylcarbazol-9-yl)phenyl] fluorene (TBCPF) as the light-emitting layer have been fabricated by spin-coating. The host TBCPF can form homogeneous amorphous films by spin-coating and has triplet energy higher than that of the blue phosphorescent dye FIrpic. All the devices with different FIrpic concentration in the emitting layer give emission from FIrpic indicating complete energy transfer from TBCPF to FIrpic. The device shows the best performance with a peak brightness of 8050cd/m2 at 10.2V and the maximum current efficiency up to 3.52cd/A, when the FIrpic doped concentration is as high as 16%.
Abstract：Efficient blue small molecular phosphorescent light-emitting diodes with a blue phosphorescent dyebis(3,5-difluoro-2-(2-pyridyl)-phenyl-(2-carboxypride) iridium (III) (FIrpic) doped into a novel small-molecule host 9,9-bis[4-(3,6-di-tert-butylcarbazol-9-yl)phenyl] fluorene (TBCPF) as the light-emitting layer have been fabricated by spin-coating. The host TBCPF can form homogeneous amorphous films by spin-coating and has triplet energy higher than that of the blue phosphorescent dye FIrpic. All the devices with different FIrpic concentration in the emitting layer give emission from FIrpic indicating complete energy transfer from TBCPF to FIrpic. The device shows the best performance with a peak brightness of 8050cd/m2 at 10.2V and the maximum current efficiency up to 3.52cd/A, when the FIrpic doped concentration is as high as 16%.
(Methods of deposition of films and coatings; film growth and epitaxy)
引用本文:
HOU Liu-Dong;LI Wei;DUAN Lian;QIU Yong. Efficient Solution-Processed Blue Electrophosphorescent Devices Based on a Novel Small-Molecule Host[J]. 中国物理快报, 2008, 25(4): 1457-1460.
HOU Liu-Dong, LI Wei, DUAN Lian, QIU Yong. Efficient Solution-Processed Blue Electrophosphorescent Devices Based on a Novel Small-Molecule Host. Chin. Phys. Lett., 2008, 25(4): 1457-1460.
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2008, Vol. 25 
