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MODIFIKASI TIGA BAHAN ALAM DENGAN PENAMBAHAN TEMBAGA SEBAGAI FOTOSENSITIZER PADA DSSC: Kata Kunci: Wortel (Dauzus carrot L), Beras ketan hitam (Oryza sativa. Var. Glutinosa), Daun kelor (Moringa olifera), Tembaga, DSSC. Ferdianto, Sandy Prayoga; Rohmawati, Lydia
Inovasi Fisika Indonesia Vol. 13 No. 2 (2024): Vol 13 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v13n2.p37-44

Abstract

Abstrak Ketersediaan energi fosil berbanding terbalik dengan peningkatan konsumsi listrik di Indonesia. Kondisi tersebut mendorong sebuah inovasi agar energi listrik tetap tersedia. Sinar matahari dapat menjadi salah satu alternatif pilihan yang dikonversi menjadi listrik yang dikenal dengan sel surya. Dye-Sensitized Solar Cells (DSSC) merupakan generasi ke-3 dari sel surya organik yang ditemukan oleh Michael Graetzel pada tahun 1991. Prinsip kerja DSSC adalah zat warna dari bahan alam untuk dapat meningkatkan luas celah pita semikonduktor. Penelitian ini bertujuan untuk mengetahui potensi pemanfaatan ekstrak wortel (Dauzus carrot L), beras ketan hitam (Oryza sativa. Var. Glutinosa), dan daun kelor (Moringa olifera) dengan penambahan tembaga dengan variasi 1-4 g untuk meningkatkan efisiensi DSSC. Spektrofotometer UV-Vis dan voltametri siklik digunakan untuk menganalisis sifat tembaga yang ditambahkan ke dalam larutan dye untuk mengukur potensi molekul pewarna sebagai sensitizer pada DSSC. Berdasarkan hasil karakterisasi UV-Vis dan voltametri siklik pada sampel 5 yakni pada larutan dye dengan penambahan 4 g tembaga maka didapatkan nilai absorbansi tertinggi sebesar 0.875 a.u. pada panjang gelombang 432 nm dan nilai energi gap sebesar 0.77063 eV. Fabrikasi DSSC dibuat menggunakan sistem sandwich yang terdiri dari elektroda kerja berupa kaca yang dilapisi TiO2 dan direndam pada larutan dye, larutan elektrolit, serta elektroda referensi berupa karbon. Sistem kerja pendeposisian pasta TiO2 diatas kaca ITO dengan menggunakan metode doctor blade sehingga didapatkan efisiensi DSSC sebesar 0.63 %. Dengan demikian, penggunaan bahan alami dengan penambahan tembaga sebagai dye-sensitizer dapat digunakan sebagai pengganti pewarna sintetis Kata Kunci: Wortel (Dauzus carrot L), Beras ketan hitam (Oryza sativa. Var. Glutinosa), Daun kelor (Moringa olifera), Tembaga, DSSC. Abstract The availability of fossil energy is inversely proportional to the increase in electricity consumption in Indonesia. These conditions encourage innovation so that electrical energy remains available. Sunlight can be an alternative option converted into electricity, known as solar cells. Dye-Sensitized Solar Cells (DSSC) are the 3rd generation of organic solar cells discovered by Michael Graetzel in 1991. The working principle of DSSC is to use dyes from natural materials to increase the area of the semiconductor band gap. This research aims to determine the potential for utilizing carrot extract (Dauzus carrot L), black sticky rice (Oryza sativa. Var. Glutinosa), and moringa leaves (Moringa olifera) with the addition of copper with variations of 1-4 g to increase DSSC efficiency. UV-Vis spectrophotometer and cyclic voltammetry were used to analyze the properties of copper added to the dye solution to measure the dye molecule's potential as a DSSC sensitizer. Based on the results of UV-Vis characterization and cyclic voltammetry on sample 5, namely the dye solution with the addition of 4 g of copper, the highest absorbance value was obtained at 0.875 au at a wavelength of 432 nm and a gap energy value of 0.77063 eV. DSSC fabrication uses a sandwich system consisting of a working electrode in the form of glass coated with TiO2 and immersed in a dye solution, electrolyte solution, and a reference electrode in the form of carbon. The working system for the deposition of TiO2 paste on ITO glass uses the doctor blade method to obtain a DSSC efficiency of 0.63%. Thus, the use of natural ingredients. Keywords: Carrots (Dauzus carrot L), Black sticky rice (Oryza sativa. Var. Glutinosa), Moringa leaves (Moringa olifera), Copper, DSSC.
Characterisation of Rhizome Extract (Curcuma xanthorrhiza Roxb) Ointment as an Anti-Acne Remedy Ferdianto, Sandy Prayoga; Syafaah, Lailatus; Rohmawati, Lydia
Journal of Dedication in Community Vol. 1 No. 2 (2023)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences (FMIPA) Universitas Negeri Surabaya (UNESA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jodic.v1n2.p29-37

Abstract

Skin is one of the five senses of humans that functions as a thermostat in maintaining body temperature, protecting the body from attack by microorganisms, ultraviolet rays, and regulating blood pressure. However, insufficient protection factors make the skin easily infected by bacteria that can cause skin diseases. One such disease is acne. Acne occurs when anaerobic bacteria such as Staphyloccocus aureus multiply rapidly in the deep skin layers. This study was conducted to overcome acne on the skin by using an ointment preparation made from temulawak rhizome. This research uses qualitative and quantitative methods with data collection techniques through organoleptic testing, homogeneity, pH, spreadability, adhesion, and irritation. The subjects in this study were physics students at Surabaya State University with a total of 5 students. The results showed that the organoleptic test on the preparation of temulawak rhizome extract ointment was semi-solid, brownish yellow in colour, and the distinctive smell of temulawak rhizome extract. The Ph test showed a value of 5 equal to the normal pH of the skin and no irritation on the volunteer's skin. The ointment formulation had no effect on its homogeneity and had excellent adhesion