Iron
oxide is a multifunctional material for many applications,
including photovoltaic technology. Iron oxide’s phase and crystal
structures could vary and be easy to control depending on the desirable
requirement for solar cell devices. Their distinctive physical and
chemical properties are suited for solar cell applications as primary
and complementary parts of solar cell devices. With their stability
and abundance, iron oxides could be expected to realize highly stable
and cost-efficient solar cell devices. Noting that iron oxide-based
solar cells still need to be explored compared to silicon, copper,
and organic-based solar cells, we compile information on the potential
of iron oxides in photovoltaic technology and extract some plausible
strategies to make iron oxides as the main and complementary parts
for high-efficient solar cell devices in this review. The prospects
and challenges of iron oxides in photovoltaic technology to bring
its commercialization are also explained.