Produção de células solares de TiO2/Nb sensibilizadas com corantes naturais

Abstract

Dye sensitized solar cells (DSSC) are promisors devices for solar energy conversion. They are produced by the use of a semiconductor oxide and photosensitive material. To improve the photoconversion energy efficiency, a mix of oxides is applied and dyes extracted from natural products can be used when the objective is to produce a low-cost system. This work aims to develop and evaluate a DSSC with Ti and Nb sensitized with dyes extracted from Capsicum Anuum and Curcuma Longa. For the inorganic analysis, Scanning Electron Microscopy (SEM), X-ray Fluorescence (XRF), and X-ray Diffraction (XRD) will be used. To electrochemical analysis, j-V curves, photochronoamperometic measurement (j-t), and Open Circuito Potential (OCP) will be performed. As a result of the corresponding partial analyzes during the oxide synthesis, it was observed that is possible to produce Ti/Nb particles by the Pechini methodology, with high crystallinity and mix of rutile and anatase forms. Electrochemical results showed an improving in photoconversion energy cell efficiency with 25% to Curcuma longa and 12% to Capsium Anuum when Nb was inserted.