Study of the Nb2O5 Insertion in ZnO to Dye-sensitized Solar Cells

Dye-sensitized solar cells (DSSC) have received much attention as an alternative to silicon-based solar cells, due to various advantages. Zinc oxide (ZnO) is an n-type semiconductor employed as photoanode on DSSC. The decrease of charge recombination is an efficient strategy capable of improving the photovoltaic performance of the device. In this perspective, Nb2O5 was added on ZnO solar cells. The oxides were characterized by the X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and X-ray fluorescence (XRF). The photovoltaic parameters were obtained through J-V plots and photocronoamperometry. The results showed that the niobium oxide obtained presented orthorhombic crystal structure and DSSC with the addition of niobium oxide showed better efficiency, of 1.42% when compared the device with only ZnO.

染料敏化太阳能电池（Dye-sensitized solar cells, DSSC）凭借诸多优势，作为硅基太阳能电池的替代方案受到广泛关注。氧化锌（ZnO）作为n型半导体，被用作染料敏化太阳能电池的光阳极。降低电荷复合是提升器件光伏性能的有效策略。基于此研究视角，本研究将五氧化二铌（Nb₂O₅）添加至氧化锌基太阳能电池中。采用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）与X射线荧光光谱（XRF）对所制备的氧化物材料进行表征。通过J-V曲线与光计时电流法获取了器件的光伏参数。结果表明，所制备的五氧化二铌具有正交晶系晶体结构；与仅采用氧化锌的器件相比，添加五氧化二铌的染料敏化太阳能电池展现出更优异的光电转换效率，可达1.42%。