Zheng H W, Liang X, Yu Y H, Wang K, Zhang X A, Men B Q, Diao C L, Peng C X, Yue G T
School of Physics and Electronics, Institute of Microsystem, and Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng, 475004, China.
Department of Electronic Information Engineering, Henan Vocational College of Agriculture, Zhengzhou, 451450, China.
Nanoscale Res Lett. 2017 Dec;12(1):18. doi: 10.1186/s11671-016-1799-5. Epub 2017 Jan 6.
The present study reports BiFeTiO (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%).
本研究报道了BiFeTiO（BFTO）纳米纤维/石墨烯（Gr）纳米复合材料（BGr）作为染料敏化太阳能电池（DSSC）中的对电极（CE）。采用基于溶胶 - 凝胶的静电纺丝技术制备了直径为40 - 100nm的BFTO纳米纤维。通过X射线衍射、扫描电子显微镜和透射电子显微镜对BFTO纳米纤维和BGr纳米复合材料的微观结构和表面形貌进行了表征。对BGr对电极的电化学性能进行了全面表征和研究。与原始BFTO相比，由于纳米复合材料具有更大的表面积和更低的电解质 - 电极界面转移电阻，其对三碘化物还原的电催化性能有显著提高。最大功率转换效率已达到9.56%，远高于纯BFTO对电极的效率（0.22%）。
