Fullerene derivatives as acceptors for polymer solar cells

Abstract

Polymer solar cells (PSCs) have drawn broad attention because of their advantages of low cost, light weight, and flexibility. Tremendous progress has been made on polymer solar cells to achieve high power conversion efficiency (PCE), and PCE of PSCs has already reached to 8%. The fullerene derivative is used as the excellent electron acceptor for PSCs, and the development of highly efficient fullerene acceptors has become the hot research field in recent years. In this paper, we reviewed the recent research progress on several types of fullerene derivative acceptors and heir relevant photovoltaic device properties, which could afford some reference for the development of high performance fullerene derivative acceptors.

Fullerene Functionalized Thiophene Derivative as an Acceptor Material for Organic Photovoltaics

“…Fullerene as such cannot be used as an acceptor material for OPVD due to its less solubility in common organic solvents. [6,6]-phenyl-C 60 -butyric acid methyl ester (PC 60 BM)is one of the chemically modified fullerenes gained much interest as the acceptor material in OPV due to its low lying lowest unoccupied molecular orbital (LUMO), high electron mobility and compatibility with most of the donor materials, which are soluble in most of the common organic solvents [11]. Even though these fullerene derivatives are well explored in the field of OPV, researchers have been trying to replace PC 60 CBM with its higher fullerene analogue C70PCBM [12,13] in order to improve the efficiency of the devices.…”