Despite
extensive research into novel materials, iron oxides remain
fascinating and attract considerable attention because of their versatility,
stability, ease of fabrication, low cost, natural abundance, and environmental
friendliness. Because of their wealth of magnetic, optical, and electrical
properties, iron oxides are particularly multifunctional materials
that can be integrated into various devices. In this article, we will
discuss the applications of iron oxide thin films in electronics (spintronics
devices), energy (batteries and solar cells or photovoltaics), and
sensors (gas, humidity, strain, biosensors, and so on). We begin with
the most recent forms and fabrication methods for iron oxide thin
film, as well as a fundamental understanding of the material. Additionally,
the application constraints of these devices are discussed, and the
challenges, solutions, and prospects for electronic devices based
on iron oxide are outlined.