Abstract
A nitrogen-doped reduced graphene oxide (N-RGO) nanosheet was synthesized by a simple hydrothermal method and characterized by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and scanning electrode microscopy. After being deposited as counter electrode film for dye-sensitized solar cells (DSSCs), it is found that the synthesized N-RGO nanosheet has smaller charge-transfer resistance and better electrocatalytic activity towards reduction of triiodide than the reduced graphene oxide (RGO) nanosheet. Consequently, the DSSCs based on the N-RGO counter electrode achieve an energy conversion efficiency of 4.26%, which is higher than that of the RGO counter electrode (2.85%) prepared under the same conditions, and comparable to the value (5.21%) obtained with the Pt counter electrode as a reference. This N-RGO counter electrode offers the advantages of not only saving the cost of Pt itself but also simplifying the process of counter electrode preparation. Therefore, an inexpensive N-RGO nanosheet is a promising counter electrode material to replace noble metal Pt.
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A nitrogen-doped reduced graphene oxide nanosheet was synthesized by a simple hydrothermal method, which is a promising counter electrode material to replace noble metal Pt.
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This work was supported by the National Natural Science Foundation of China (Grant 21571042, 21371040, 61705063, and 21203058), the Science Foundation for Youths of Heilongjiang Province of China (Grant No. QC2016013), the Foundation of Educational Commission of Heilongjiang Province of China (No. 12531579), the Innovative Talents Program of Heilongjiang University of Science and Technology (Q20130202), and the Postdoctoral Foundation of Heilongjiang Province of China (LBH-Z16203).
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Wei, L., Wang, P., Yang, Y. et al. Facile synthesis of nitrogen-doped reduced graphene oxide as an efficient counter electrode for dye-sensitized solar cells. J Nanopart Res 20, 110 (2018). https://doi.org/10.1007/s11051-018-4203-9
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DOI: https://doi.org/10.1007/s11051-018-4203-9