Organic molecule comprising a structure of formula A1 wherein A at each instance is independently CR b or N; R N is methyl, phenyl, xylyl, mesityl, naphthyl, biphenyl, naphthylphenyl, terphenyl or 2,4,6-triphenylphenyl; R a at each instance is independently H, deuterium, an alkyl group or an aryl group; R b at each instance is independently selected from the group consisting of: - H, - deuterium, - CF 3, - C(=O)R 1, - CN, - an alkyl group which is unsubstituted or substituted by one or more R 2, - an aryl group which is unsubstituted or substituted by one or more R 2 and is optionally additionally substituted by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups, - a heteroaryl group which is unsubstituted or substituted by R 2 and/or by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups and - a group of the sub-formula T1 or a group of the sub-formula T2: wherein: R N2 is an alkyl group, an aryl group which is unsubstituted or substituted by one or more R N3 or a heteroaryl group which is unsubstituted or substituted by one or more R N3; R N3 is an alkyl group, an aryl group or a heteroaryl group; R 1 at each instance is an aryl group which is unsubstituted or substituted by one or more R 2; R 2 at each instance is independently F, CF 3 or CN; wherein one to four A are N or at least one R b is selected from the group consisting of: - CF 3, - C(=O)R 1, - CN, - an alkyl group substituted by one or more R 2, - an aryl group substituted by one or more R 2, and optionally additionally substituted by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups, - a heteroaryl group which is unsubstituted or substituted by one or more R 2 and/or by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups and - a group of the sub-formula T1 or a group of the sub-formula T2: A at each instance is independently CR b or N; R N is methyl, phenyl, xylyl, mesityl, naphthyl, biphenyl, naphthylphenyl, terphenyl or 2,4,6-triphenylphenyl; R a at each instance is independently H, deuterium, an alkyl group or an aryl group; - H, - deuterium, - CF 3, - C(=O)R 1, - CN, - an alkyl group which is unsubstituted or substituted by one or more R 2, - an aryl group which is unsubstituted or substituted by one or more R 2 and is optionally additionally substituted by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups, - a heteroaryl group which is unsubstituted or substituted by R 2 and/or by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups and - a group of the sub-formula T1 or a group of the sub-formula T2: wherein: R N2 is an alkyl group, an aryl group which is unsubstituted or substituted by one or more R N3 or a heteroaryl group which is unsubstituted or substituted by one or more R N3; R N3 is an alkyl group, an aryl group or a heteroaryl group; R 1 at each instance is an aryl group which is unsubstituted or substituted by one or more R 2; R 2 at each instance is independently F, CF 3 or CN; wherein one to four A are N or at least one R b is selected from the group consisting of: - CF 3, - C(=O)R 1, - CN, - an alkyl group substituted by one or more R 2, - an aryl group substituted by one or more R 2, and optionally additionally substituted by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups, - a heteroaryl group which is unsubstituted or substituted by one or more R 2 and/or by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups and - a group of the sub-formula T1 or a group of the sub-formula T2: R N2 is an alkyl group, an aryl group which is unsubstituted or substituted by one or more R N3 or a heteroaryl group which is unsubstituted or substituted by one or more R N3; R N3 is an alkyl group, an aryl group or a heteroaryl group; R 1 at each instance is an aryl group which is unsubstituted or substituted by one or more R 2; R 2 at each instance is independently F, CF 3 or CN; R N3 is an alkyl group, an aryl group or a heteroaryl group; R 1 at each instance is an aryl group which is unsubstituted or substituted by one or more R 2; R 2 at each instance is independently F, CF 3 or CN; wherein one to four A are N or at least one R b is selected from the group consisting of: - CF 3, - C(=O)R 1, - CN, - an alkyl group substituted by one or more R 2, - an aryl group substituted by one or more R 2, and optionally additionally substituted by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups, - a heteroaryl group which is unsubstituted or substituted by one or more R 2 and/or by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups and - a group of the sub-formula T1 or a group of the sub-formula T2: - CF 3, - C(=O)R 1, - CN, - an alkyl group substituted by one or more R 2, - an aryl group substituted by one or more R 2, and optionally additionally substituted by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups, - a heteroaryl group which is unsubstituted or substituted by one or more R 2 and/or by one or more unsubstituted alkyl groups and/or by one or more unsubstituted or alkyl-substituted aryl groups and - a group of the sub-formula T1 or a group of the sub-formula T2: