Abstract
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.
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Acknowledgments
This work was financially supported by The National Natural Science Foundation of China (Nos. 21473048, 21303039), The Natural Science Foundation of Hebei Province (Nos. B2015205163, B2016205161, B2013205171), Science Foundation of Hebei Normal University (L2016J02), the Second Batch of Young Talent of Hebei Province, Support Program for Hundred Excellent Innovation Talents from the Universities of Hebei Province, BR2-220), and 2015 Hebei Province Undergraduate Training Programs for Innovation and Entrepreneurship.
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Wu, K., Sun, X., Duan, C. et al. Vanadium oxides (V2O5) prepared with different methods for application as counter electrodes in dye-sensitized solar cells (DSCs). Appl. Phys. A 122, 787 (2016). https://doi.org/10.1007/s00339-016-0317-z
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DOI: https://doi.org/10.1007/s00339-016-0317-z