Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4767237 | Electrochimica Acta | 2017 | 33 Pages |
Abstract
A facile and new solution-based synthesis for the preparation of Nb2O5 nanoparticles (NPs) is firstly introduced. Chain-like particles of 30 to 50Â nm are synthesized through a hydrolysis reaction using an ethanol-based NbCl5 precursor and H2O2 as a strong oxidizer by UV treatment. A uniform dispersion of ultrasmall Nb2O5 NPs with a quantum size of 2 to 5Â nm is further obtained by modifying the procedure with acetic acid as a stabilizer. The resultant Nb2O5 NPs are controllably coated on fluorine-doped tin oxide (FTO) conductive glass through 2-volt electrophoresis. The Nb2O5-coated thin film functioned as an effective blocking layer between a mesoporous TiO2 and FTO; it thereby reduced the recombination at the TiO2/FTO/electrolyte interface in dye-sensitized solar cells. Furthermore, it serves as an ultrathin and compact hole blocking layer in perovskite solar cells, resulting in moderate hysteresis effect and improved photovoltaic efficiency from high-transmittance, low capacitance and low series resistance.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Yu-Ting Huang, Rui Cheng, Peng Zhai, Hyeonseok Lee, Ya-Huei Chang, Shien-Ping Feng,