High temperature solid oxide solar cells based on SrTiO₃ (STO) are investigated. Schottky contacts between STO and different materials, including La_1-xSr_xCrO₃, La_0.8Sr_0.2MnO₃, La_0.6Sr_0.4CoO₃ and metals like Au and Pt are illuminated by UV light with a wavelength of 365 nm at 350 °C in air and the resulting voltages and currents are measured. With certain material combinations, e.g. LaCrO₃/STO or Au/STO heterojunctions, high photovoltages of more than 1.0 V are obtained. Current measurements reveal changes in the bulk STO due to stoichiometry polarization, leading to a self-enhancement effect of the photovoltaic cell. Mechanistic insight in the processes under UV light is gained by electrochemical impedance spectroscopy, especially regarding the space charge region at the heterojunction and bulk changes due to stoichiometry polarization. In addition to the electronic effects upon illumination, also photo-ionic effects of oxygen transport caused by chemical potential changes were observed.

研究了基于 SrTiO ₃ (STO) 的高温固体氧化物太阳能电池。STO 与不同材料（包括 La _1-x Sr _x CrO ₃、La _0.8 Sr _0.2 MnO ₃、La _0.6 Sr _0.4 CoO ₃以及 Au 和 Pt 等金属）之间的肖特基接触被波长为 365 nm、波长为 350 的紫外光照射空气中的°C 和由此产生的电压和电流被测量。使用某些材料组合，例如 LaCrO ₃/STO 或 Au/STO 异质结，获得超过 1.0 V 的高光电压。电流测量显示由于化学计量极化导致体 STO 的变化，导致光伏电池的自增强效应。电化学阻抗谱可以深入了解紫外光下的过程，尤其是异质结的空间电荷区域和由于化学计量极化引起的体积变化。除了对光照的电子效应外，还观察到由化学势变化引起的氧传输的光离子效应。