| abstract |
The present invention discloses a device and a formulation containing a compound having a structure according to the following formula 1 and a compound of the formula 1: In the compound of Formula 1, X 1 , X 2 , X 3 , X 4 , X 5 and X 6 are independently selected from the group consisting of CR and N; Each R is independently selected from hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl Is selected from the group consisting of acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; The at least one R comprises a donor having two or more electron donating nitrogen. |