dc.date2015
dc.date2016-06-03T20:14:44Z
dc.date2016-06-03T20:14:44Z
dc.date.accessioned2018-03-29T01:33:27Z
dc.date.available2018-03-29T01:33:27Z
dc.identifier
dc.identifierQuimica Nova. Sociedade Brasileira De Quimica, v. 38, n. 10, p. 1357 - 1365, 2015.
dc.identifier1004042
dc.identifier10.5935/0100-4042.20150148
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84953272787&partnerID=40&md5=6e67085a475ed2506d454d2e873a99e1
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/238267
dc.identifier2-s2.0-84953272787
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1304928
dc.descriptionAn interesting practical experiment about the preparation of dye-sensitized solar cells (DSSC) using natural dyes were carried out by the undergraduate students in the chemistry course at UNICAMP. Natural dyes were extracted from blueberries (Vaccinium myrtillus L.), jabuticabas (Myrciaria cauliflora), raw and cooked beets (Beta vulgaris L.), and annattos (Bixa orellana L.), which were used to sensitize TiO2 films that composed the photoanode in the DSSC. A polymer electrolyte containing an iodide/triiodide redox couple was used in lieu of the use of liquid solutions to prevent any leakage in the devices. A maximum solar-to-electric energy conversion of 0.26 ± 0.02% was obtained for the solar cell prepared with annatto extracts. This experiment was an effective way to illustrate to the undergraduate students how to apply some of the chemical concepts that they learned during their chemistry course to produce electric energy from a clean and renewable energy source. Teachers could also exploit the basics of the electronic transitions in inorganic and organic compounds (e.g., metal-to-ligand charge transfer and ς-ς∗ transitions), thermodynamics (e.g., Gibbs free energy), acid-base reactions in the oxide solid surface and electrolyte, and band theory (i.e., the importance of the Fermi level energy).
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dc.description
dc.description
dc.languagept
dc.publisherSociedade Brasileira de Quimica
dc.relationQuimica Nova
dc.rightsfechado
dc.sourceScopus
dc.titleSolar Cells Sensitized With Natural Dyes: An Introductory Experiment About Solar Energy For Undergraduate Students [células Solares Sensibilizadas Por Corantes Naturais: Um Experimento Introdutório Sobre Energia Renovável Para Alunos De Graduação]
dc.typeArtículos de revistas


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