| 초록 |
Effect of substitution position of dibenzofuran on the photophysical properties and device performances of host materials for phosphorescent organic light-emitting diodes was investigated. Substitution of dibenzofuran from 3-position reduced triplet energy, but improved charge transport properties of host materials. Substitution at 4-position maintained the high triplet energy of dibenzofuran and also enhanced charge transport properties, while substitution at 2-position had negative effect on the charge transport properties, but could keep the high triplet energy of the core. |
