Abstract
This paper optically characterized anthocyanins and betalains pigments in blueberry and dragon fruit, respectively, to function as a dye sensitizer in dye-sensitized solar cell (DSSC).Ultrasonic extraction treatment was enforced to cocktail dye with a temperature, time and frequency rating of 30 °C, 30 minutes and 37 Hz, respectively. Different extracting solvent from ethanol and distilled water were used to observe the absorption spectra by using UV-Vis absorption spectroscopy. Fourier transforms infrared (FT-IR) were used to characterize the functional components of dyes. From FT-IR spectra, cocktail dye represented the existing of carboxyl group correspond to the CO=OH stretching vibrations which is an important functional group in betalains pigment. From UV-Vis absorption spectra, the cocktail dye extracted with ethanol (M-Etha), compared to DI-water (M-DI) has the peak absorbance of 500 nm with broader absorbing range in visible light spectrum (450-600 nm). As for the photon energy, results show a narrow energy gap of 2.49 eV with higher absorption coefficient of 2.17 km-1.
| Original language | English |
|---|---|
| Pages (from-to) | 6348-6353 |
| Number of pages | 6 |
| Journal | ARPN Journal of Engineering and Applied Sciences |
| Volume | 10 |
| Issue number | 15 |
| Publication status | Published - 2015 |
| Externally published | Yes |
Keywords
- Anthocyanins
- Betalains
- Carboxyl group
- Cocktail dye
- Photon energy