KOAKSI VEGETASI RAWA SEBAGAI PEMEKA CAHAYA PADA DYE SENSITIZED SOLAR CELL

HOWER, HAISEN and Tamrin, Tamrin and Pratama, Filli and Hersyamsi, Hersyamsi (2021) KOAKSI VEGETASI RAWA SEBAGAI PEMEKA CAHAYA PADA DYE SENSITIZED SOLAR CELL. Doctoral thesis, Sriwijaya University.

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Abstract

Dye Sensitized Solar Cell ( DSSC ) is a device that can convert sunlight energy into electrical energy, using dye as a photosensitizer. Dye can be derived from the dye complex of metals, dye synthesis and natural dye. The use of natural dye photosensitizer has received great attention by researchers because the technology is simple, easy to assemble, safe, inexpensive and has no negative impact on the environment and the raw materials are abundant. Natural dye photosensitizer source which is widely used comes from vegetation in the form of leaves, flowers, fruit, stems, roots and bark. South Sumatra, which covers more than 70% of the area consisting of swamps, is rich in vegetation diversity that has the potential to be used as a source of natural dye. Therefore, this study exploits the potential of vegetation diversity, both those that have been utilized or have not been used directly by us in our daily life, such as leaves (DN-EG) and flowers (BG-EG) of water hyacinth ( Eichhornia crassipes ), leaves (DN-SD), fruit (BH-SD), and flowers (BG-SD) of malabar malestome ( Melastoma malabathricum Linn), leaves (DN-NP), flowers (BG-NP), and fruit (BH-NP) of nipa (Nypa fruticans Wurmb), leaves (DN-KR), and flowers (BG-KR) of primrose willow (Ludwigia peruviana). This study aims to see the performance of DSSC using a single natural dye photosensitizer, two-coaction and three-coaction natural dye derived from one, two and three different vegetations, as well as to see the pattern of changes in the electrical characteristics of the DSSC during the period of use or storage. Also carried out characterization of TiO2 powder using Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD) and characterization of natural dye with Fourier Transform Infra Red (FTIR) and UV-Vis spectrophotometry. This study was divided into 4 stages, namely 1) determining the performance of the DSSC from a single natural dye photosensitizer produced by each part of the vegetation, 2) determining the performance of a coaxial DSSC of two natural dye photosensitizer from one and two vegetations, 3) determining the performance Three coaxial DSSC of natural dye photosensitizer from two and three vegetation, and 4) determine the pattern of changes in the electrical iii characteristics of the DSSC during the period of use or storage. Phase 1 to Phase 3 of the research carried out the preparation of the photosensitizer, photoelectrode preparation, working electrode, reference electrode, assembling the DSSC structure, and finally measuring the electrical characteristics of the DSSC. The fourth stage is measuring the electrical characteristics of the DSSC for 23 days. The data and parameters observed in this study were light intensity, current density, voltage, output power, fill factor, efficiency, bandgap energy and absorption coefficient. Results of analysis of XRD showed that the crystalline TiO2 are in the anatase phase with average crystal size of 36.696 nm. Based on the top and side views, SEM TiO2 photos with magnification of 25,000x show gaps or pores between TiO2 particles ranging from 140.91 nm to 329.91 nm. The results of the FTIR analysis of the natural dye extracts of leaves, flowers, and fruit of the vegetation used contained functional groups of chlorophyll pigments, anthocyanins and carotenoids. The results of UV-Vis analysis of the natural dye extract coaction showed that the wavelength range of peak absorption was wider and the absorbance value increased compared to single natural dye . The highest efficiency of single natural dye DSSC is found in BH-SD, coaction 2 of 1 vegetation is found in coaction DN-SD+BD-SD, coaction 2 of 2 vegetation is found in coaction BH-SD+DN-NP, coaction 3 of 2 vegetation is found in the DN-SD+BH-SD+BG-NP coaction and 3 of the 3 vegetations in the DN-EG+BHSD+BH-NP coaction with values of 0,083%, 0,126%, 0,184%, 0,07% and 0,211% sequentially. The electrical characteristics of the DSSC for 23 days of observation changed following a polynomial regression pattern of order 3 with an average R2 > 0.80 as much as 95% for single natural dye DSSC, 82.5% for two natural dye coaxial DSSC and 85.7% for three natural dye coaxial DSSC.

Item Type:	Thesis (Doctoral)
Uncontrolled Keywords:	KOAKSI VEGETASI RAWA, DYE SENSITIZED SOLAR CELL
Subjects:	S Agriculture > S Agriculture (General) > S1-(972) Agriculture (General) S Agriculture > S Agriculture (General) > S539.5-542.3 Research. Experimentation
Divisions:	05-Faculty of Agriculture > 54001-Agricultural Science (S3)
Depositing User:	Mrs Beta Ria Febrianti
Date Deposited:	31 Jan 2023 06:34
Last Modified:	31 Jan 2023 06:34
URI:	http://repository.unsri.ac.id/id/eprint/88806

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