| abstract |
The present invention relates to an OLED host material, which has the structure shown in general formula I. The new OLED material provided by the present invention is centered on dibenzofuran. Since dibenzofuran is a better electron transport unit, the material has both hole transport properties and electron transport properties, and can actually transport holes and electrons in the light-emitting layer. Electronic transmission balance; also has a higher triplet state energy level, which effectively prevents energy from returning to the host material during the luminescence process, thereby improving its luminous efficiency. |