Organo-electronic functional material and use thereof
View Patent ↗The invention provides an organo-electronic functional material comprising a tris(arylamino)benzene represented by the general formula (I) wherein A and B are each a group represented by the general formula (II) in which R is an alkyl group of 1-6 carbons or a cycloalkyl group of 5 or 6 carbon atoms and n is 0, 1, 2 or 3, and A and B may be the same or different from each other, and exhibiting a cyclic voltamogram in which a deviation of peak current of cyclic curves as measured 50 times at a sweep rate of 20 mV/s falls within ±10% of the average of peak current. The organo-electronic functional material has an opto-electronic exchanging function, a reversible oxidation-reduction property and a high glass transition temperature, and can form amorphous film in itself. In addition, it is stable and exhibits only slight variation of peak current in repeated oxidation-reduction process so that it is suitable for use as, for example, a hole transporting material among others in various electronic devices including an organic electroluminescence element.
1. An organo-electronic functional material comprising a tris(arylamino)benzene represented by the general formula (I)
wherein A and B are each a group represented by the general formula (II)
in which R is an alkyl group of 1-6 carbons or a cycloalkyl group of 5 or 6 carbon atoms and n is 0, 1, 2 or 3, provided that n is 1, 2, or 3 in at least one of A and B, and exhibiting a cyclic voltamogram in which a deviation of peak current of cyclic curves as measured 50 times at a sweep rate of 20 mV/s falls within ±10% of the average of peak current.
2. The organo-electronic functional material as claimed in claim 1 , wherein the tris(arylamino)benzene comprises the group A, which is a biphenylyl or a terphenyl group that is substituted with an alkyl group of 1-6 carbons or a cycloalkyl group of 5 or 6 carbon atoms at the terminal phenyl group thereof and the group B, which is a phenyl group that is substituted with an alkyl group of 1-6 carbons or a cycloalkyl group having 5 or 6 carbons.
3. The organo-electronic functional material as claimed in claim 1 , in which the tris(arylamino)benzene is 1, 3, 5-tris(N-(4′-methyl-4-biphenylyl)-N-(p-tolyl)armino)benzene.
4. A hole transporting agent, the agent comprising the organo-electronic functional material as claimed in claim 1 .
5. An organic electroluminescence element, the element having a hole transporting layer containing the bole transporting agent as claimed in claim 4 .
6. An organic electroluminescence element, the element having a hole transporting layer containing the hole transporting agent as claimed in claim 4 and a hole injecting layer containing a hole injecting agent comprising a tris (4-(N,N-diarylamino)phenyl)amnine represented by the general formula (III)
wherein X and Y are each an aryl group and may be the same or different from each other.