摘要： •Doping bismuth ion into TiO2 is an effective method for enhancing VOC of DSSCs.•VOC was enhanced from 0.630V to 0.800V using Bi-TiO2 NFs as working electrode.•The optimized thickness of meso-TiO2 NPs as working electrode in DSSCs is 12μm.•DSSCs using Bi-TiO2 NFs as scattering layer had maximum PCE of 8.89%. Doping metal-ion into TiO2 materials is an effective method for enhancing the performance of dye-sensitized solar cells (DSSCs). In order to develop materials that are easy to produce even in industrial quantities, we established a facile method by hydrothermal synthesis and subsequent heat treatment to prepare bismuth doped titanium dioxide nanofibers (Bi-doped TiO2 NFs). At first, we adopt Bi-doped TiO2 NFs as the working electrode to further study in DSSCs. Serving as working electrode, Bi-doped TiO2 NFs can remarkably improve open-circuit voltage (VOC). The VOC was significantly enhanced from 0.633V to 0.800V compared with pristine TiO2 does. However, this leads to a smaller JSC and a poorer overall performance for such devices. In order to improve the performance of DSSCs, we adopt Bi-doped TiO2 NFs as the scattering layer of DSSCs, and various thicknesses of meso-TiO2 nanoparticles (meso-TiO2 NPs) were used as working electrode to increase the short-circuit current (JSC). The incorporated Bi-doped TiO2 NFs can help the electron transport and may reduce the possibility for electron–hole recombination. After optimizing the device’s parameter, the overall performance of the meso-TiO2 NPs/Bi-doped TiO2 NFs devices was dominated by JSC until a maximum efficiency was attained with a meso-TiO2 NPs thickness of 12μm. Such optimized DSSCs exhibited high open circuit voltage of 0.787V, high fill factor of 78.2%, and high power conversion efficiency of 8.89%. 出版者： New York: Elsevier Ltd 出版日期： 2016-10-01 出處： Solar Energy, 2016-10, Vol.135, p.22-28 版權： 2016 Elsevier Ltd 版權： Copyright Pergamon Press Inc. Oct 2016 識別號： ISSN: 0038-092X 識別號： EISSN: 1471-1257 識別號： DOI: 10.1016/j.solener.2016.05.021 識別號： CODEN: SRENA4
