HOLE TRANSPORT MATERIALS FOR LONG LIFESPAN OLED HAVING HIGH TRIPLET ENERGY, AND OLED COMPRISING SAME

摘要

According to the present invention, hole transport materials induce a substituent which turns an orientation angle to two phenylene groups of a biphenyldiamine partial structure, and an aryl group to two nitrogen atoms of the biphenyldiamine partial structure, thereby improving light emitting properties such as low driving voltage and high light emitting efficiency, and increasing thermal stability by raising rotational energy barrier of molecules and lifespan of a diode. The hole transport material is a biphenyldiamine derivative represented by chemical formula 1. Accordingly, the present invention can manufacture an organic light emitting diode (OLED) of high efficiency, low voltage, high brightness, and long lifespan by using the same.;COPYRIGHT KIPO 2015