Abstract
Pyranoflavylium derivatives, namely cyanidin-3-glucoside, malvidin 3-O-glucoside, malvidin 3-O-coumaroylglucoside, cyanidin 3-glucoside-pyruvic acid adduct and malvidin 3-glucoside-pyruvic acid adduct, extracted from red grapes were used as sensitizers in dye-sensitized solar cells (DSSCs). With these natural dyes, cell's efficiencies ranged up to 0.08%. The cyanidin based dyes were more efficient as sensitizers than the malvidin molecules and the presence of the pyruvic acid adduct decreased efficiency. Furthermore, the use of drops of Port wine in the production of DSSCs resulted in an efficiency of 0.025%. Although the obtained efficiencies still need improvements for an industrial application, it is given further evidence that wine dyes can harvest and convert sunlight into electricity through a process that mimics natural photosynthesis.
Highlights
The energetic dependency on non-renewable energy sources is still an unsolved problem
The molar extinction coefficient of the natural dyes Cy‐3-Glu, cyanidin-3-O-glucoside-pyruvic acid adduct (Cy-Py), Mv-3-Glu, malvidin-3-O-glucoside-pyruvic acid adduct (Mv-Py) and Mv‐Cum dissolved in ethanol was obtained from the absorbance spectra: (10.3 ± 0.5) × 103 mol‐1 L cm−1 at 531 nm, (3.4 ± 0.2) × 103 mol‐1 L cm-1 at 690 nm, (6.1 ± 0.3) × 103 mol‐1 L cm-1 at 535 nm, (6.1 ± 0.3) × 103 mol‐1 L cm-1 at 536 nm, (3.9 ± 0.2) × 103 mol‐1 L cm-1 at 540 nm, for Cy-3-Gluc, Mv-3-Gluc, Cy-Py, Mv-Py and Mv-Cum, respectively
The molar extinction coefficient of the N719 reference dye in ethanol is 14 × 103 mol-1 L cm-1 at 515 nm, slightly higher than those obtained for these natural dyes.[28]
Summary
The energetic dependency on non-renewable energy sources is still an unsolved problem. Those results showed that a higher π-conjugation in the dye increased the solar energy-to-electricity conversion efficiency.[24] this work focus on the identification and usage of anthocyanins extracted from red grapes, in the end of the maturation state seizing red wine lees by-products from red wine vinification, and used to prepare anthocyaninpyruvic acid adducts as light harvesting elements in DSSC.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
