Efficient non-fullerene polymer solar cells enabled by tetrahedron-shaped core based 3D-structure small-molecular electron acceptors

Abstract

A series of tetraphenyl carbon-group (tetraphenylmethane, tetraphenylsilane and tetraphenylgermane) core based 3D-structure non-fullerene electron acceptors were synthesized and polymer solar cell performances were tested. A power conversion efficiency of up to 4.3% was achieved.