Transient lateral photovoltaic effect in p-n heterojunctions of La0.7Sr0.3MnO3 and Si

A transient lateral photovoltaic effect (LPVE) has been observed in p-La0.7Sr0.3MnO3/n-Si heterojunctions. Under the nonuniform irradiation of a pulsed laser, the LPVE shows high sensitivity to the spot position on the La0.7Sr0.3MnO3 surface. A mechanism based on the well established model for the LPVE in conventional semiconductors has been applied to explain the LPVE in the heteroepitaxial junctions of perovskite-type metal oxides. The large LPVE in the heteroepitaxial junctions is expected to make the perovskite-type metal oxide a new and faster candidate for position-sensitive photodetectors. (c) 2006 American Institute of Physics.