Vanadium oxides (V2O5) prepared with different methods for application as counter electrodes in dye-sensitized solar cells (DSCs)

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• 作者：Kezhong Wu ; Xiaolong Sun ; Chongyuan Duan ; Jing Gao ; Mingxing Wu
• 刊名：Applied Physics A: Materials Science & Processing
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：122
• 期：9
• 全文大小：1,348 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Optical and Electronic Materials
  Nanotechnology
  Characterization and Evaluation Materials
  Surfaces and Interfaces and Thin Films
  Operating Procedures and Materials Treatment
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-0630
• 卷排序：122

文摘

V₂O₅ was synthesized by four different procedures employing thermal decomposition, sol–gel, and hydrothermal methods which were subsequently introduced into dye-sensitized solar cells (DSCs) as counter electrode (CE) catalysts for the regeneration of traditional iodide/triiodide (I−/I₃−) redox couple. The catalytic activities of as-prepared V₂O₅ were significantly affected by the synthetic routes as evidenced by cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization curve. Power conversion efficiency (PCE) of the DSCs employing V₂O₅ CE, fabricated by thermal decomposition method, was observed to be 3.80 % by using citric acid as an additive, while the PCE of the DSCs using V₂O₅ CE prepared by hydrothermal and thermal decomposition methods without additive, as well as by a sol–gel procedure, was determined to be 2.13, 2.08, and 2.04 %, respectively.