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All Journal Teknosains: Media Informasi Sains dan Teknologi Al-Kimia
Ibrahim Patunrengi, Iswadi
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Agriculture, Biological Sciences & Forestry Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Physics

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Karakterisasi Zat Warna Kayu Secang (Caesalpinia sappan L.) Fraksi Kloroform:Metanol sebagai Photosensitizer pada Dye Sensitized Solar Cell Suriadi; Aisyah; Suriani; Ibrahim Patunrengi, Iswadi
Al-Kimia Vol 13 No 1 (2025): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

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Abstract

The electricity crisis in Indonesia is caused by the decreasing supply of fossil fuels for power plants. One solution to overcome this problem is the Dye-sensitized Solar Cell (DSSC) which can convert sunlight into electrical energy by utilizing environmentally friendly organic dyes. This study has succeeded in making and determining DSSC using organic dyes derived from sappanwood extract with pH variations (4, 7, and 10). Each pH level produces efficiency values ​​of 0.01714%, 0.05497% and 0.03174%. VLC with a chloroform: methanol ratio (5:5 and 1:9) was then characterized using UV-Vis, FTIR, and GC-MS instruments. Characterization of sappanwood dye extract using UV-Vis instrument showed absorption at wavelengths of 243, 285, 445, and 541. FTIR instrument provided information on functional groups –OH at wave number 3415.93 cm-1 and C-O-C at wave number 1255.66 cm-1 which are characteristic of isoflavonoid compounds. In addition, GC-MS instrument indicated the possibility of fragment m/z 286 at retention time 9.54 is a brazilin
PREPARASI SEL SURYA TERSENSITISASI DYE (DSSC) DARI EKSTRAK KULIT UBI JALAR UNGU (Ipomoea batatas L.) Aisyah, Aisyah; Jusnia, Jusnia; Nur, Arfiani; Abubakar, A. Nurfitriani; Ibrahim Patunrengi, Iswadi
Teknosains Vol 17 No 1 (2023): Januari-April
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v17i1.32860

Abstract

Various dyes have been investigated for Dye-Sensitized Solar Cell application. The ethanol extract from peels of purple sweet potato Ipomoea batatas L. is commonly used as a dye in TiO2 semiconductors. However, in this study the dyes were extracted stepwise by three solvents with graded polarity; n-hexane, ethyl acetate, and methanol. Each extract and the mixture are used as the sensitizers for DSSC. This aimed to compare the efficiency value to obtain the highest solar energy conversion into electricity. The DSSC performance was studied based on the phytochemical analysis, UV-Vis and FTIR spectrum, and the semiconductor morphology by SEM analysis. The mixed extract produced the highest cell efficiency of 0,10 with Vmax and Imax values of 276 mV and 25,7 mA, respectively.
Co-Authors Abubakar, A. Nurfitriani Aisyah Aisyah Aisyah Arfiani Nur Jusnia, Jusnia Suriadi Suriani