Patent ID: 8927749
Filing Date: 2015-01-06
Classification: C07F,C09K,H01L

Abstract:
1. A compound having a formula I: wherein X is Si or Ge; R R R R L is a single bond or comprises an aryl or heteroaryl group having from 5-20 carbon atoms, which is optionally further substituted with one or more groups selected from hydrogen, deuterium, alkyl, cycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, aryl, heteroaryl, and combinations thereof; and A contains a group selected from the group consisting of indole, carbazole, benzofuran, dibenzofuran, benzothiophene, dibenzothiophene, benzoselenophene, dibenzoselenophene, triphenylene, azacarbazole, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene, azatriphenylene, and combinations thereof, which are optionally further substituted with one or more groups selected from hydrogen, deuterium, alkyl, cycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, aryl, heteroaryl, and combinations thereof;