The vast majority of oxides which have been explored so far for photovoltaic or photocatalytic applications suffer from the problem of large band gap (> 3 eV). Such oxides can utilize only the ultraviolet portion of the solar spectrum. But, every now and then, materials scientists synthesize oxides with a low band gap. In theory, such oxides are good for photovoltaic and photocatalytic applications. But the mass production of these oxides may not turn out to be very cheap. In this context, oxides consisting of earth-abundant elements are crucial. AlFeO3 is a brilliant example of such an oxide. All its constituent elements are earth abundant. Oxygen is the most abundant, aluminum is the third most abundant and iron is the fourth most abundant element in the earth’s crust. It also has a low band gap of 2 eV. Thus, the investigation of the properties of AlFeO3 for photovoltaic and photocatalytic applications is of great value to the scientific community. In this seminar, the results of our work on the use of AlFeO3/ZnO heterojunctions for photoelectrochemical water splitting will be presented.