A small molecule acenaphtho[1,2-b]quinoxaline diimide derivative (AQI-T2) was synthesized.
AQI-T2 exhibited a broad absorption band and a low-lying LUMO level of −3.64 eV.
AQI-T2 can be used as electron-acceptor for non-fullerene organic solar cells.
A relatively high Voc of 0.86 V was obtained for PTB7-Th:AQI-T2 based non-fullerene OSCs.