Portable electronic devices require a small volume self-powered energy system that can combine fabrication of energy harvesting and storage devices in one plane. This study focuses on fabricating novel all-oxide photovoltaic and supercapacitor devices based on MoO₃, V₂O₅, and Co_xO_y thin electrodes prepared by a two-electrode cell arrangement. The fabricated devices were tested using solar simulator and potentiostat at ambient temperature. The power conversion efficiencies of the fabricated photovoltaic devices were found in the range of 0.17–0.39% depending on buffer layer characteristics. It therefore suggests that V₂O₅ and MoO₃ can buffer photovoltaic processes by lowering the conduction band offset in the proximate Co_xO_y absorber. Pseudocapacitive behavior of MoO₃/Co_xO_y||MoO₃/Co_xO_y and V₂O₅/Co_xO_y||V₂O₅/Co_xO_y planar devices showed that they delivered maximum specific areal capacity values of 0.694 and 0.778 μAhcm⁻² respectively at discharge current density of 0.1 mAcm⁻². They also showed considerably low reduction in energy density (about 38.7%) even at a remarkable increase in power density of about 450% (at a high current density of 1.0 mAcm⁻²). In addition, the symmetric microsupercapacitors showed excellent retention of capacity even after 5000 cycles. These results generally indicate the reliability of the fabricated devices in the development of portable electronic components for energy application.

便携式电子设备需要一个小体积的自供电能源系统，可以将能量收集和存储设备的制造结合在一个平面上。这项研究的重点是制造基于 MoO ₃、V ₂ O ₅和 Co _x O _y薄电极的新型全氧化物光伏和超级电容器装置，这些电极是通过双电极电池排列制备的。在环境温度下使用太阳能模拟器和恒电位仪测试制造的设备。根据缓冲层特性，制造的光伏器件的功率转换效率在 0.17-0.39% 的范围内。因此，这表明 V ₂ O ₅和 MoO ₃可以通过降低邻近 Co _x O _y吸收器中的导带偏移来缓冲光伏过程。MoO ₃ /Co _x O _y ||MoO ₃ /Co _x O _y和 V ₂ O ₅ /Co _x O _y ||V ₂ O ₅ /Co _x O _y平面器件的伪电容行为表明它们提供了最大的比面积容量放电电流密度为 0.1 mAcm ^{-2 时的}值分别为 0.694 和 0.778 μAhcm ^-2. 即使功率密度显着增加约 450%（在 1.0 mAcm ^-2的高电流密度下），它们也显示出相当低的能量密度降低（约 38.7% ）。此外，对称微型超级电容器即使在 5000 次循环后仍显示出出色的容量保持率。这些结果通常表明制造的设备在用于能源应用的便携式电子元件的开发中的可靠性。