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J–V curves (left) and
EQE (right) spectra for ITO/ZnO/PTB7-Th:biBPI/MoO3/Ag solar
cells (1:1 and 1:1.5 wt ratios for 1b and 3b, respectively) with and without additives (1 wt % DIO + 2 wt % CN
for 1b; 2 wt % DIO for 3b).e See Figure S6 for the absorption
spectra of blend films.