Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1127, Issue -, Pages 145-155Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2016.07.086
Keywords
Crude and pre-concentrated anthocyanins; Solid phase extraction; Dye-sensitized solar cell; Photovoltaic performance; DFT/TDDFT
Categories
Funding
- Nanotechnology Center (NANOTEC)
- NSTDA
- Ministry of Science and Technology, Thailand through program of Center of Excellence Network and the Integrated Nanotechnology Research Center (INRC), Khon Kaen University, Thailand [KKU55/12]
- Faculty of Engineering, Khon Kaen campus and Institute of Research and Development, Rajamangala University of Technology Isan
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The low cost DSSCs utilized by crude and pre-concentrated anthocyanins extracted from six anthocyanin-rich samples including mangosteen pericarp, roselle, red cabbage, Thai berry, black rice and blue pea were fabricated. Their photo-to-current conversion efficiencies and stability were examined. Pre-concentrated extracts were obtained by solid phase extraction (SPE) using C18 cartridge. The results obviously showed that all pre-concentrated extracts performed on photovoltaic performances in DSSCs better than crude extracts except for mangosteen pericarp. The DSSC sensitized by pre-concentrated anthocyanin from roselle and red cabbage showed maximum current efficiency eta = 0.71% while DSSC sensitized by crude anthocyanin from mangosteen pericarp reached maximum efficiency eta = 0.97%. In addition, pre-concentrated extract based cells possess more stability than those of crude extract based cells. This indicates that pre-concentration of anthocyanin via SPE method is very effective for DSSCs based on good photovoltaic performance and stability. The DFT/TDDFT calculations of electronic and photoelectrochemical properties of the major anthocyanins found in the samples are employed to support the experimental results. (C) 2016 Elsevier B.V. All rights reserved.
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