02874nmmaa2200337 i 4500 PUCPR 20210621134404.0 150430e2021 pr a fq d 00 0 eng d PUCPR spa rda PUCPR PUCPR spa evl 23 T 621.31244 R6961p CD 23 T 621.31244 R6961p CD Rodríguez Ortiz, Elbannette 298372 Pigments from Sargassum sp. for low-cost photovoltaic solar cell performance / [electronic resource] by Elbannette Rodríguez Ortiz. 2021. 1 disco de computadora (9, 50 hojas) ; 4¾ pulgadas (11.5 centímetros) rdacontent txt texto rdamedia c computer rdacarrier cd computer disc Thesis (Master in Science- Chemistry) -- Pontificia Universidad Católica de Puerto Rico, 2021. Bibliographical references : leaves 35-40. Dye-Sensitized Solar Cell using natural pigments is a low-cost, easy fabrication, and ecofriendly technology. Natural pigments like Chlorophyll and Fucoxanthin are part of the composition of Sargassum sp. which can be a problem at high concentrations on the Caribbean beaches. Both pigments increase the light absorption during the photosynthesis process. The use of Chlorophyll and Fucoxanthin extracted from Sargassum sp. as sensitizer is an innovative idea. This project seeks to evaluate these natural pigments taking into consideration photophysical properties such as optical absorption and emission spectrum. The structure composition of these pigments has conjugate bonds and alkoxylate functional groups, which act as the anchoring site to the semiconductor surface (TiO2). The affinity of alkoxylate groups for the semiconductor surface is expected that can sensitize the wide bandgap semiconductor material and improve the photosensitization process. A synergetic effect of both pigments should enhance panchromatic light absorption. The optoelectronic parameters of extracted dyes were obtained using the J-V curve that gives the principal parameters for solar cell characterization (Jsc,Voc, FF and %ղ ). As a result of the synergetic effect, the constructed cell using mixed dyes (1:1) as a sensitizer had the maximum efficiency (0.0025%). Disc characteristics : CD-ROM. System requirements : PC, CD-ROM reader and Adobe Acrobat Reader. 294920 Pontificia Universidad Católica de Puerto Rico Dissertations. Local 150778 Photovoltaic power generation Research Puerto Rico Sargassum Research Puerto Rico 298373 Pontificia Universidad Católica de Puerto Rico. Colegio de Ciencias. Departamento de Química 294919 ddc 3 23 T 621.31244 R6961p CD 0 296424 296424 0 0 ddc 0 0 10 10 71 2021-06-21 Colegio de Ciencias 2 T 621.31244 R6961p CD 80000002597501 2024-05-13 09:46:26 2022-06-08 2021-06-21 3