Bib class="a-plus-plus">5b>FeTib class="a-plus-plus">3b>Ob class="a-plus-plus">15b> nanofibers/graphene nanocomposites as an effective counter electrode for dye-sensitized solar cells

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• 作者：H. W. Zheng ; X. Liang ; Y. H. Yu ; K. Wang ; X. A. Zhang…
• 关键词：Bi5FeTi3O15 ; Graphene ; Nanocomposites ; Counter electrode ; Dye ; sensitized solar cell
• 刊名：Nanoscale Research Letters
• 出版年：2017
• 出版时间：December 2017
• 年：2017
• 卷：12
• 期：1
• 全文大小：1341KB
• 刊物主题：Nanotechnology; Nanotechnology and Microengineering; Nanoscale Science and Technology; Nanochemistry; Molecular Medicine;
• 出版者：Springer US
• ISSN：1556-276X
• 卷排序：12

文摘

The present study reports Bib>5b>FeTib>3b>Ob>15b> (BFTO) nanofibers/graphene (Gr) nanocomposites (BGr) as counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). BFTO nanofibers with diameters of 40–100 nm were fabricated by sol-gel based electrospinning technique. The microstructure and surface morphology of the BFTO nanofibers and the BGr nanocomposites were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The electrochemical performances of BGr CEs were comprehensively characterized and investigated. Compared to pristine BFTO, the nanocomposites have a marked improvement in electrocatalytic performance for the reduction of triiodide because of larger surface area and lower transfer resistance on the electrolyte-electrode interface. The maximum power conversion efficiency has reached 9.56%, which is much larger than that of pure BFTO CEs (0.22%).