Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 16, Issue 1, Pages 744-752Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2016.10835
Keywords
Anatase TiO2 Nanoparticles; Nanoprecursor-Mediated Synthesis; Dye-Sensitized Solar Cells; Mg2+-Doping; Efficient Photoanode
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Funding
- Foundation of Human Resource Development (Advanced track for Si-based solar cell materials and devices) grant of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea Government Ministry of Knowledge Economy [20124030200080]
- Nanshan District Key Lab for Biopolymers and Safety Evaluation [KC2014ZDZJ0001A]
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Surface-doping anatase TiO2 nanoparticles with Mg2+ were prepared via a novel synthetic method, and used as photoanodes for dye-sensitized solar cells (DSSCs). X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) image results indicate that the Mg2+ doping has no effect on the crystal phase and morphology of anatase TiO2. The shift in XRD peaks to higher angles, the absorption shift in UV-vis diffuse reflection spectra, and X-ray photoelectron spectroscopy (XPS) results indicate the incorporation of Mg2+-ions into the TiO2 lattice. The as-prepared TiO2 nanoparticles doped with a low concentration of ions is proven a superior photoanode material than pure anatase TiO2. The energy-conversion efficiency (ii) of DSSC based on TiO2 nanoparticles doped with Mg2+ is at a maximum of 5.90%, corresponding to an efficiency improvement of 23.4% as compared to DSSC based on un-doped TiO2. This new synthetic approach using a nanoprecursor provides a simple and versatile method for the preparation of excellent photoanode materials for application in solar energy conversion devices.
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