Compounds including a ligand with a dibenzo-fused 5-membered ring substituent are provided. In particular, the compounds may be iridium complexes including imidazole coordinated to the dibenzo-substituted ligand. The dibenzo-fused 5-membered ring moiety of the ligand may be twisted or minimally twisted out of plane with respect to the rest of the ligand structure. The compound may be used in organic light emitting devices, particularly as emitting dopants in blue devices. Devices comprising the compounds may demonstrate improved stability while maintaining excellent color.
提供了包括带有二
苯并融合的5元环取代基的配合物。特别地,该化合物可以是包括
咪唑配合到二
苯基取代
配体的
铱配合物。
配体的二
苯并融合的5元环部分可能会扭曲或最小限度地与其余的
配体结构平面不一致。该化合物可以用于有机发光器件,特别是作为蓝色器件中的发射掺杂剂。包含该化合物的器件可以表现出优异的颜色并提高稳定性。