A capacitor comprising a first electrode, a second electrode, and a dielectric layer of molecular material disposed between said first and second electrodes (13, 14), wherein said electrodes (13, 14) are flat and planar and positioned parallel to each other, and the molecular material is described by the general formula D p -(Core)-H q where Core is: - a polarizable conductive anisometric core forming molecular stacks due to π - π -interaction selected from the group consisting of the following structural formulas 2, 5, 6 and 7: 2 5 6 7 where n = 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, or - an electroconductive oligomer forming molecular stacks due to π-π-interaction selected from the group consisting of the following structural formulas 3 and 4: 3 4 where n = 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, or - polyaniline (PANI), and said Core being characterized by a longitudinal axis D and H are insulating substituents respectively attached at the opposite ends of the core molecule according to said longitudinal axis, and p and q are numbers of the D and H substituents accordingly, wherein said substituents are attached to the Core in apex positions, and p and q are independently selected from values 1, 2, 3, 4, and 5, and wherein at least one of the insulating groups D and at least one of the insulating groups H is each selected independently from the group consisting of alkyl, fluorinated alkyl, chlorinated alkyl, branched alkyl, branched fluorinated alkyl, branched chlorinated alkyl groups, and any combination thereof, and wherein when said Core is polyaniline (PANI), the insulating substituents are fluorinated alkyl substituents. - a polarizable conductive anisometric core forming molecular stacks due to π - π -interaction selected from the group consisting of the following structural formulas 2, 5, 6 and 7: 2 5 6 7 where n = 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, or - an electroconductive oligomer forming molecular stacks due to π-π-interaction selected from the group consisting of the following structural formulas 3 and 4: 3 4 where n = 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, or - polyaniline (PANI), and said Core being characterized by a longitudinal axis D and H are insulating substituents respectively attached at the opposite ends of the core molecule according to said longitudinal axis, and p and q are numbers of the D and H substituents accordingly, wherein said substituents are attached to the Core in apex positions, and p and q are independently selected from values 1, 2, 3, 4, and 5, and wherein at least one of the insulating groups D and at least one of the insulating groups H is each selected independently from the group consisting of alkyl, fluorinated alkyl, chlorinated alkyl, branched alkyl, branched fluorinated alkyl, branched chlorinated alkyl groups, and any combination thereof, and wherein when said Core is polyaniline (PANI), the insulating substituents are fluorinated alkyl substituents. - polyaniline (PANI), and said Core being characterized by a longitudinal axis D and H are insulating substituents respectively attached at the opposite ends of the core molecule according to said longitudinal axis, and p and q are numbers of the D and H substituents accordingly, wherein said substituents are attached to the Core in apex positions, and p and q are independently selected from values 1, 2, 3, 4, and 5, and wherein at least one of the insulating groups D and at least one of the insulating groups H is each selected independently from the group consisting of alkyl, fluorinated alkyl, chlorinated alkyl, branched alkyl, branched fluorinated alkyl, branched chlorinated alkyl groups, and any combination thereof, and wherein when said Core is polyaniline (PANI), the insulating substituents are fluorinated alkyl substituents. D and H are insulating substituents respectively attached at the opposite ends of the core molecule according to said longitudinal axis, and p and q are numbers of the D and H substituents accordingly,