Symmetric charge transfer compounds for organic photovoltaics

A compound represented by Formula (A-I):

• wherein
• E is a core chromophore group represented by Formula (E-1);
• A is an electron accepting group represented by a formula selected from the group consisting of Formula (A-4) to Formula (A-9):
• wherein, in Formula (A-4) to Formula (A-9),
• each R1 to R2 independently represents mono to the maximum allowable substitution;
• each R and R1 to R2 independently represents hydrogen or a substituent selected from the group consisting of deuterium, halogen, pseudohalogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, amide, hydroxyl, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, heteroalkynyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, boryl, acyl, carboxylic acid, benzoyl, ether, ester, vinyl, ketone, sulfinyl, sulfonyl, cyano, phosphino and combinations thereof;
• wherein any two adjacent R or R1 to R4 are optionally joined or fused together to form a ring which is optionally substituted;
• each X1 to X8 independently represents C, Si, N or P;
• and
• each Z1, Z2, and Z3 independently represents CR2, NR, O, or S;
• π is a linking group;
• m is an integer from 0 to 3;
• and
• p is an integer from 1 to 3;
• wherein each A is the same and each π is the same
• wherein, in Formula (E-1):
• each R1 and R2 independently represents mono to the maximum allowable substitution;
• each R1 and R2 independently represents hydrogen or a substituent selected from the group consisting of deuterium, halogen, pseudohalogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, amide, hydroxyl, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, heteroalkynyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, boryl, acyl, carboxylic acid, benzoyl, ether, ester, vinyl, ketone, sulfinyl, sulfonyl, cyano, phosphino and combinations thereof;
• wherein any two adjacent R1 or R2 are optionally joined or fused together to form a ring which is optionally substituted
• each RM independently represents hydrogen or a substituent selected from the group consisting of deuterium, halogen, pseudohalogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, amide, hydroxyl, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, heteroalkynyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, boryl, acyl, carboxylic acid, benzoyl, ether, ester, vinyl, ketone, sulfinyl, sulfonyl, cyano, phosphino and combinations thereof;
• X1 represents C, Si, N or P;
• and
• M is a monovalent, divalent, trivalent or tetravalent atom.