Rectifying characteristics, magnetic tunability, and photovoltaic response in La0.8Hf0.2MnO3/0.7 wt% Nb-SrTiO3 heteroepitaxial junctions

Abstract

Good rectifying characteristic in p-n junctions composed of La 0.67 Ca 0.33 MnO 3−δ / Nb -0.7 wt %-doped SrTiO 3

Temperature‐dependent transport and photoelectric properties in La0.9Hf0.1MnO3 based all‐perovskite‐oxide heterojunctions

“…Figure shows the I–V curves of the LHMO/STON heterojunction measured in the dark and under light irradiation ( λ = 532 nm) at 40, 100, 160, and 220 K, respectively. Addition to the excellent rectifying behavior, the heterojunction exhibits a significant photoelectric effect in a broad temperature range from 40 to 300 K, which is similar to other manganites/Nb:STO heterojunctions . The photoelectric conversion efficiencies are 0.0159, 0.0191, 0.0184, and 0.00213% at the temperature of 40, 140, 220, and 300 K, respectively, which is comparable to the reported results .…”

Field effects on heterojunctions composed with electron-doped La1−xHfxMnO3and Nb-SrTiO3perovskites

“…It leads to the accumulation of charge carriers and appearance of the photovoltage, normally characterized by the open circuit voltage. 20,21 The strong response to the light modulation shows that the heterojunctions have potential applications in photoelectric devices. …”

Photoinduced electronic and ionic effects in strontium titanate

“…158 Wu et al investigated the temperature dependence of Nb:STO based PV cells with hafnium doped lanthanum manganite thin films as a top layer. 164 While magnetoresistance of the thin film could be demonstrated, no dependence of the photovoltage on the magnetic state was found. Higher photovoltages found at lower temperatures are attributed to a thicker depletion region or a higher diffusion voltage of the built-in field at lower temperatures.…”

“…Magnetic suppression has been reported for Ca and Sr codoped praseodymium manganite [158]. Wu et al investigated the temperature dependence of Nb:STO based PV cells with hafnium doped lanthanum manganite thin films as a top layer [164]. While magnetoresistance of the thin film could be demonstrated, no dependence of the photovoltage on the magnetic state was found.…”