| abstract |
The present invention relates to the use of a compound according to formula (1) in an electron transporting layer or electron injecting layer constituted in an electronic device: (1) In this formula, Wherein each of R 1 , R 2 , R 1 ' and R 2' is independently selected from H, C 1 -C 6 alkyl, C 1 -C 6 haloalkyl and C 6 -C 10 aryl, Both of the cyclic substituents are linked to each other by a hydrocarbyl group to form an anelated divalent C 2 -C 10 hydrocarbyl group; X and X 'are independently selected from C and N; If X is C then R 5 is H and if X 'is C then R 5' is H and if X is N then R 5 is a lone electron pair and if X 'is N then R 5' Each of R 3 , R 4 , R 3 ' , R 4' is independently selected from H and C 6 -C 10 aryl, only, R 3 , R 4 Both, as well as R 3 ' and R 4' are not both aryl at the same time, When X is C, then when R 3 and R 4 are not simultaneously H, and when X 'is C, R 3' and R 4 ' are not simultaneously H, Both substituents on the same phenyl or pyridyl ring are cyclized together with hydrocarbyl groups to form a divalent C 4 -C 10 hydrocarbyl group that represents a substituted or unsubstituted 6-membered aromatic ring. |