Publication date: Available online 1 November 2016
Source:Thin Solid Films
Author(s): Yanmei Li, Qingsong Zhang, Laiyou Niu, Juan Liu, Xingfu Zhou
Compared with the poor electron conducting ability of rutile TiO2 , materials such as SnO2 -Sb2 O3 composite have excellent electron mobility. Here, we report the synthesis of rutile TiO2 nanorod arrays grown on FTO substrate through a mild one-pot hydrothermal method. TiO2 nanorods array were then modified with SnO2 -Sb2 O3 composite by spin coating technology. The morphology and the structure were examined by field emission scanning electron microscopy (FESEM) and X-ray powder diffraction (XRD). EIS measurement show the transfer resistance of the electrons is greatly reduced, while the UV–Vis diffuses reflectance spectra and the corresponding optical bandgaps measured by Tauc plots indicate that the energy gap of the modified TiO2 remains unchanged. Time-limited photocurrent response and IPCE both show that the solar cell using SnO2 -Sb2 O3 modified TiO2 show improved photoelectric response. The solar cell optimized with SnO2 -Sb2 O3 has a higher photocurrent density and a higher fill factor, which leads to 7.7% conversion efficiency and a 19% increase when compared to the unmodified TiO2 nanorods arrray.
Source:Thin Solid Films
Author(s): Yanmei Li, Qingsong Zhang, Laiyou Niu, Juan Liu, Xingfu Zhou