{"title":"Antocianinas de la pitanga como fotosensibilizadores de celdas DSSC","authors":"","doi":"10.26461/23.02","DOIUrl":null,"url":null,"abstract":"Pigments of natural origin continue to be of interest for their application as sensitizers in cells of the DSSC type. In particular, dyes from native fruits or plants are interesting con-sidering their affordability. In this work, purified anthocyanin extracts were obtained from pitanga fruits ( Eugenia Uniflora L. ) and characterized by visible spectroscopy and FTIR, and the stability up to 85 ℃ evaluated. These anthocyanins were mixed with different amounts of Mg2+, Al3+, Cr3+ at different working pH, finding the optimal complexation ratio for each system. The systems were also characterized by redox measurements, obtaining an oxidation potential close to 1 V for all cases, confirming the favorable characteristics of the compounds evaluated for their use in DSSC cells. FTIR confirmed the binding of anthocyanins and metal complexes to TiO2. The DSSC cells evaluated showed maximum conversion efficiency values of 0.24 % in complexes with chromium.","PeriodicalId":30552,"journal":{"name":"Innotec","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Innotec","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.26461/23.02","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Pigments of natural origin continue to be of interest for their application as sensitizers in cells of the DSSC type. In particular, dyes from native fruits or plants are interesting con-sidering their affordability. In this work, purified anthocyanin extracts were obtained from pitanga fruits ( Eugenia Uniflora L. ) and characterized by visible spectroscopy and FTIR, and the stability up to 85 ℃ evaluated. These anthocyanins were mixed with different amounts of Mg2+, Al3+, Cr3+ at different working pH, finding the optimal complexation ratio for each system. The systems were also characterized by redox measurements, obtaining an oxidation potential close to 1 V for all cases, confirming the favorable characteristics of the compounds evaluated for their use in DSSC cells. FTIR confirmed the binding of anthocyanins and metal complexes to TiO2. The DSSC cells evaluated showed maximum conversion efficiency values of 0.24 % in complexes with chromium.
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