1579983-01-9Relevant academic research and scientific papers
Using an organic molecule with low triplet energy as a host in a highly efficient blue electrophosphorescent device
Fan, Cong,Zhu, Liping,Liu, Tengxiao,Jiang, Bei,Ma, Dongge,Qin, Jingui,Yang, Chuluo
, p. 2147 - 2151 (2014/03/21)
To achieve high efficiencies in blue phosphorescent organic light-emitting diodes (PhOLEDs), the triplet energies (T1) of host materials are generally supposed to be higher than the blue phosphors. A small organic molecule with low singlet energy (S1) 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,C2′)iridium(III)] tetrakis(1-pyrazolyl)borate (FIr6; T1=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 37cd A-1 and power efficiency of 40Lm W-1 were achieved for the FIr6-based blue PhOLEDs. Copyright
