Application of Niobium-based Bimetal Oxides in Dye-sensitized Solar Cells

作者：王晨; Yuzhi Hou; Xiao Zhou; Ziqi Wang; Hongfei Xu; 云斯宁

来源：第四届新型太阳能电池学术研讨会, 中国北京, 2017-05-27.

• Niobium-based bimetal oxides
• catalysts
• dye-sensitized solar cells
• counter electrode

Typical DSSCs are composed of a fluorine-doped tin oxide（FTO） glass, a dyed coated TiO2 anode, an electrolyte, and a counter electrode（CE）. The function of CE is to catalyze the iodine/iodide（I-/I3-） redox couple and complete the electric circuit in the DSSCs. Becuse Pt electrode can be decomposed to PtI4 by I-/I3- redox couple, thus resulting in the critical issues on the cell performance, long-term stability, and commercialization of DSSCs. Therefore, it is necessary to explore Pt-free CEs to facilitate the industrial development of DSSCs. The present work is to synthesis new substitude materials to instead of costly Pt electrode. Niobium-based bimetal oxides, Nb2FeO6 and Nb2CoO6, have been sucessfully synthesized by a simple chemical method. As a CE for DSSCs, power conversion efficiencies of 5.14% and 3.15% were achieved after preliminary evaluation of PV performance, in which new component systems, dye Y123, dye D35 and Cu eletrolyte have been employed. To detect the further characteristics, CV, Tafel, EIS etc. have been investigated. The results show that niobium-based bimental oxides exhibit considerable catalytic activity and stability.

• 出版日期2017
• 单位西安建筑科技大学