Favorable ultraviolet photoelectric effects in TbMnO3/Nb-SrTiO3 heterostructures
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Materials Science and Engineering Program
KAUST Solar Center (KSC)
Laboratory of Nano Oxides for Sustainable Energy
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AbstractThe rectifying properties and ultraviolet photoelectric effects in TbMnO3/Nb-doped SrTiO3 heterostructures have been investigated. The ideality factors and the diffusion voltages obtained from the current-voltage curves nonlinearly decrease with increasing the temperature. It is observed that the maximum photovoltaic values of the heterostructure irradiated by the 365 nm (2.6 mW/mm2) and 248 nm (0.71 mJ/mm2) lights are about 0.121 V and 0.119 V at T=300 K, respectively. The relations between the relaxation of photovoltages after the irradiation and the power intensity are revealed. These results suggest the potential applications in the development of ultraviolet detectors using oxides-based heterostructures.
SponsorsThis work is supported by the National Natural Science Foundation of China (Nos. 61078057, 51202195 and 51172183) and NPU Foundation for Fundamental Research (No. JC20120246).
JournalSolid State Communications