Cathode interface materials based on perylene-diimide derivatives for thickness insensitivity and high fill factor heterojunction organic solar cells

Excellent cathode interface materials with good solubility, high fill factor, and thickness insensitivity were obtained by modification of N , N ′-bis(2,6-diisopropylphenyl)-3,4,9,10-perylenetetracarboxylic diimide.