Natural Dyes from Roselle Flower as a Sensitizer in Dye-Sensitized Solar Cell (DSSC)

Abstract

<p>Hibiscus Sabdariffa L. well known as Roselle flower was used as sensitizers for Dye-Sensitized Solar Cell (DSSC). The dyes were extracted using distilled water (DI) and ethanol (E) extract solvent in an ultrasonic cleaner for 30 minutes with a frequency of 37 Hz by using ‘degas’ mode at the temperature of 30°. Doctor blade method was applied in the fabrication of titanium dioxide (TiO<sub>2</sub>) on ITO glass. Absorption spectra of Roselle dye with different extract solvent were tested using Evolution 201 UV-Vis Spectrophotometer. Fourier-Transform Infrared (FTIR) was used to identify the functional active group in extract dye. Based on FTIR result, the broad absorption at peak 2889 cm-<sup>1</sup>, 2976 cm-<sup>1</sup>, and 3366 cm-<sup>1</sup> attributed to the O-H stretching which is the presence of hydroxyl group. The use Field Emission Scanning Electron Microscopy (FESEM) and Energy-Dispersive Spectroscopy (EDS) analysis are to characterize the surface morphology and element in the TiO<sub>2</sub> thin film.</p>

Molecular interaction of natural dye based on Zea Mays and Bixa Orellana to nanocrystalline TiO2 into dye sensitized solar cells.

“…Natural dyes, including plant colorants such as anthocyanins [4][5][6][7][8][9][10][11][12], betalains [13][14][15][16], chlorophyll [17][18][19][20][21] and carotenoids [22][23][24], have already been targeted in many studies. For this particular work, two natural products from Peru have been used.…”