ITIC, a non-fullerene acceptor, demonstrates exceptional thermal stability and exhibits a glass-crystal transition at a significantly lower temperature than its high glass transition temperature (Tg) of 180 °C. Furthermore, ITIC, which is an indacenodithienothiophene-based postfullerene electron acceptor, displays a distinct crystallization behavior, differing substantially from that of fullerenes.
ITIC-4F, an indacenodithienothiophene (IDTT)-based postfullerene electron acceptor, exhibits wide applicability in high-efficiency binary and ternary single-junction as well as tandem polymer solar cells (PSCs).