Optical Studies of Nature Dyes Bixa Orellana (BO), Melastoma Malabathricum (MM), Curcuma Longa (CL), Sauropus Androgynous (SA) and Pandanus Amarylitolius (PA) using UV-Vis and FTIR Spectroscopy for Nature Dyes Solar Cell.

摘要

Background: Nature dyes were promising new advantages due to low cost production, bulk materials, low energy, and optimum performance also diffuse light and multicolor option. In this present work, the dyes were extracted from 5 types of nature dyes to show the optical analysis. Objective: Nature dyes have become demanding research as alternative way and rare organic sensitizer due to lower cost and no environmental hazard. Methodology: The dyes were extracted by dilute the chosen nature dyes source such as BixaOrellana (BO), MelastomaMalabathricum (MM), Curcuma Longa (CL), Sauropus Androgynous (SA) and PandanusAmarylitolius (PA) to methanol solution and stored in freezer for several days. Hence, the extracted dyes were analyzed via Ultra-Violet Visible (UV-Vis) and Fourier Transform Infrared Spectroscopy (FTIR) in liquid form to examine their photophysical properties. Results: The absorption spectra by UV-Vis spectroscopy shown the broad with long-wavelength absorption for BO, MM, CL, SA and PA is 400 nm, 225 nm & 400 nm, 400 nm & 675 nm, and 275 nm – 450 nm – 675 nm; respectively. The comparison between all dyes show that, the energy absorption give 2.28 - 2.9 eV it is due to the absorption of light energy by dyes in the ultraviolet and visible region involves promotion of electron. Conclusion: The energy absorption gives in range 2.28 eV – 2.9 eV and the complexation was observed at 1690 - 1710 cm-1 which attribute to C=O.