Highly efficient near-infrared and semitransparent polymer solar cells based on an ultra-narrow bandgap nonfullerene acceptor

Abstract

Non-fullerene polymer solar cells based on a low bandgap polymer PTB7-Th and an ultra-narrow bandgap acceptor ACS8 exhibited an optimal PCE of 13.2%, indicating that the blend of PTB7-Th/ACS8 has potential for the practical applications of PSCs.