Bowen Zhao,Zhongquan Wan,Junsheng Luo,Fei Han,Haseeb Ashraf Malik,Chunyang Jia,Xingzhao Liu,Ruilin Wang
Sb 2 Se 3 is a potential light harvesting material for photovoltaic cells due to its excellent optical, electrical properties and eco-friendly nature. Herein, an efficient Sb 2 Se 3 sensitized solar cell (SSC) is prepared for the first time through a solution-based successive ionic layer adsorption and reaction (SILAR) process which is flexible, low-cost and easy to access. Aiming to further improve the device performance, a novel approach based on TiCl 4 treatment on mesoporous TiO 2 is introduced, which is found to optimize the growth condition of Sb 2 Se 3 nanoparticles and improve the interfacial surface state, resulting in the better band alignment and controlled recombination losses in Sb 2 Se 3 SSCs. The TiCl 4 treated device achieves the better photoelectric conversion efficiency of 1.22%, which is much higher than that of 0.46% for the solar cell without TiCl 4 treatment.
Highly crystalline BaSnO 3 nanoparticles were synthesized via a facile water bath method, and were characterized with XRD, SEM and TEM. A double-treatment method (chemical-bath deposition method and TiCl 4 treatment method) was first applied to improve the performance of the dye-sensitized solar cells (DSSCs) based on BaSnO 3 photoanode film. EIS , OCVD , and IMPS/IMVS results suggested that the enhanced electron transport rate and prolonged electron lifetime lead to a dramatically improve photovoltaic efficiency of cells in response to CBD and TiCl 4 treatment. Consequently, an enhancement of 21.7% and 32.0% was obtained after CBD surface treatment and further TiCl 4 treatment in comparison to cells without treatment, respectively. The highest efficiency of 5.18% was finally obtained after optimizing all conditions.
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