期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 8, 页码 2147-2151出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201308046
关键词
blue phosphorescence; organic light-emitting diodes; triplet state
资金
- National Basic Research Program of China (973 Program) [2013CB834805]
- National Science Fund for Distinguished Young Scholars of China [51125013]
To achieve high efficiencies in blue phosphorescent organic light-emitting diodes (PhOLEDs), the triplet energies (T-1) of host materials are generally supposed to be higher than the blue phosphors. A small organic molecule with low singlet energy (S-1) of 2.80eV and triplet energy of 2.71eV can be used as the host material for the blue phosphor, [bis(4,6-difluorophenylpyridinato-N,C-2)iridium(III)] tetrakis(1-pyrazolyl)borate (FIr6; T-1=2.73eV). In both the photo- and electro-excited processes, the energy transfer from the host material to FIr6 was found to be efficient. In a three organic-layer device, the maximum current efficiency of 37cdA(-1) and power efficiency of 40LmW(-1) were achieved for the FIr6-based blue PhOLEDs.
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