Dye Sensitized Solar Cell (DSSC) Fabrication Using Methanol Extract of Onion Peel as a Natural Sensitizer

Abstract

Methanol extracts of onion peel waste (Allium cepa) were applied as natural sensitizer in Dye-Sensitized Solar Cell (DSSC) fabrication. This research investigated the dye characteristics of onion peel extract and its power conversion efficiency. Onion peel extraction was carried out using unacidified methanol extract (UME) and acidified methanol extract (AME). Dye absorption was characterized by UV-Vis Spectrophotometer at a wavelength of 200-800 nm and FT-IR at a wave number of 4000-500 cm-1. The power conversion efficiency of the fabricated DSSC was determined by calculating the voltage and current generated by the multimeter. The red onion peel extracts, both acidified and unacidified methanol, had maximum absorption at UV-Visible range (457, 659 and 662 nm). Onion peel extract has several functional groups such as –OH, C=O, C-O-C, C=C, and C-H aromatics- showing specific absorption corresponding to the anthocyanin structure. A solar energy conversion efficiency of η= 0.0413% was obtained from UME extract with a short circuit current of up to Jsc=0.6031 mAcm-2 and a fill factor of 0.2764.

Keywords

• anthocyanin
• methanol extract
• natural sensitizer
• red onion peel
• solar cell

Supporting Institution

Institute for Research and Community Service (LPPM)

Project Number

No. 45/UN60/LPPM/PP/2021

Thanks

The authors sincerely thank the Institute for Research and Community Service (LPPM) Universitas Timor for making this investigation possible. This work was financially supported in accordance with the Novice Lecturer Research Program Contract No. 45/UN60/LPPM/PP/2021. The authors are also grateful to the Laboratory of Faperta Universitas Timor and the Chemical Laboratory of ITB Bandung for additional help.

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