In order to improve the photovoltaic performance of dye-sensitized solar cell (DSSC), graphitic carbon nitride (g-C ₃ N ₄ )/titanium dioxide (TiO ₂ ) nanofibers (NFs) are added into the photoanode of DSSC as an additional layer. g-C ₃ N ₄ is prepared by high-temperature calcination. Through sol–gel method and electrospinning technology, we prepare g-C ₃ N ₄ /TiO ₂ NFs. The material properties of g-C ₃ N ₄ /TiO ₂ NFs are characterized through X-ray diffraction (XRD), ultraviolet-visible (UV-Vis), and field emission scanning electron microscope (FE-SEM). From the measurements of electrochemical impedance spectroscopy (EIS), incident photon to current efficiency (IPCE), and ${J}-{V}$ characteristics, the performances of the DSSCs are analyzed, including impedance parameters, short-circuit current density, open-circuit voltage, fill factor, and photoelectric conversion efficiency. The results show that the addition of g-C ₃ N ₄ /TiO ₂ NFs is able to enhance the photovoltaic performance. The photoelectric conversion efficiency of the modified DSSC is increased to 5.22%. Compared with the photoelectric conversion efficiency of the DSSC without modification (4.11%), it is an increase of 27%.

中文翻译：

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g-C3N4/TiO2纳米纤维修饰光阳极提高染料敏化太阳能电池的光伏性能


为了提高染料敏化太阳能电池（DSSC）的光伏性能，将石墨氮化碳（gC ₃ N ₄ ）/二氧化钛（TiO ₂ ）纳米纤维（NFs）添加到DSSC的光阳极中作为附加层。 gC ₃ N ₄通过高温煅烧制备。通过溶胶-凝胶法和静电纺丝技术，我们制备了gC ₃ N ₄ /TiO ₂ NFs。通过X射线衍射(XRD)、紫外-可见光(UV-Vis)和场发射扫描电子显微镜(FE-SEM)表征gC ₃ N ₄ /TiO ₂ NFs的材料性能。通过电化学阻抗谱（EIS）、入射光子电流效率（IPCE）和${J}-{V}$特性的测量，分析了DSSC的性能，包括阻抗参数、短路电流密度、开路电压、填充因子和光电转换效率。结果表明，gC ₃ N ₄ /TiO ₂ NFs的添加能够提高光伏性能。改进后的DSSC光电转换效率提高至5.22%。与未经修饰的DSSC的光电转换效率（4.11%）相比，提高了27%。