Ambipolar semiconducting material o‐MeCZBDF, which has a high excited tripletenergylevel (ET), has been synthesized. This compound hashigh carrier mobilities for both holes and electrons in the amorphous state. Such characteristics are attributed to the electronegative character of the oxygen atom incorporated in the π‐electron system.
The hydrogen/deuterium isotope effect of the host material on the lifetime of organic light-emitting diodes
作者:Hayato Tsuji、Chikahiko Mitsui、Eiichi Nakamura
DOI:10.1039/c4cc05108d
日期:——
The hydrogen/deuterium primary kinetic isotope effect provides useful information about the degradation mechanism of OLED host materials. Thus, replacement of labile C–H bonds in the host with C–D bonds increases the device lifetime by a factor of five without loss of efficiency, and replacement with C–C bonds by a factor of 22.5.