Although a fast growth has been achieved for QDSCs
during thepast few years,the PCEs are still relatively lower
compared to dye-sensitized solar cells (DSCs) and perovskite solar
cells (PSCs). Among the three crucial parameters determining the
PCEs, theshort-circuit photocurrent (Jsc) and fill factor (FF) of
QDSCs have already received great improvements. Lee etal. re-
ported an unprecedentedly high photocurrentashigh as 30 mA/
cm2 for PbS:HgQDs sensitized solar device