Imidazole Derivatives and Their use as Dopants for Doping an Organic Semiconductor Matrix Material

An electronic or optoelectronic structural element comprising the imidazole derivatives represented by the following formulae:

• wherein X is selected from the group consisting of substituted and non-substituted conjugated double-bond systems, substituted and non-substituted quinoid aromatic ring systems, and substituted and non-substituted quinoid anellated aromatic ring systems, substituted and non-substituted quinoid heteroaromatic ring systems, and substituted and non-substituted quinoid alienated heteroaromatic ring systems;
• Y is selected from the group consisting of 2-indandione derivatives, C(CN)2, NCN, O, 2-cyclopentadiene derivatives, 2-cyclopentendione derivatives, C(CF3)2, C(CN)aryl, C(CN)oligoaryl, C(CN)heteroaryl, C(CF3)aryl, C(CF3)oligoaryl, C(CF3)heteroaryl, N-aryl, N-heteroaryl, N-oligoaryl, acceptor-substituted aryl, and acceptor-substituted heteroaryl;
• and
• R1-R8 are independently selected from the group consisting of hydrogen, substituted and unsubstituted aryls, substituted and unsubstituted heteroaryls, substituted and unsubstituted conjugated hydrocarbon chains with alternating C—C single and double bonds, halogen, cyano, pseudohalogen, nitro, halogenated or perhalogenated alkyls, carboxylic acids and derivatives thereof, and sulphonic acids and derivatives thereof;
• wherein at least one of R1-R8 is not hydrogen, or wherein two adjacent R1-R8 are elements of an aromatic ring system anellated to the imidazole ring.