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All Journal Teknika Jurnal Fisika Unand Jurnal Ilmiah Giga Jurnal Sains & Teknologi Lingkungan Al-Kimia Jurnal SOLMA Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Share : Journal of Service Learning Reswara: Jurnal Pengabdian Kepada Masyarakat Jurnal Bio-Geo Material Dan Energi JURNAL PENDIDIKAN DAN ILMU FISIKA Jurnal Penelitian Sains dan Pendidikan (JPSP) Jurnal Lingkungan dan Sumberdaya Alam (JURNALIS) Chemical Engineering Journal Storage (CEJS) International Journal of Health Science and Technology Jurnal Teknik Terapan (J-TETA) Jurnal Ilmu dan Inovasi Fisika Journal Of Chemical Process Engineering Helium: Journal of Science and Applied Chemistry Chimica Didactica Acta, Journal of Chemistry and Chemistry Education
Alfieta Rohmaful Aeni
Universitas Singaperbangsa Karawang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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Dye Stability and Its Effects on the Performance of Water Spinach-Based Dye-Sensitized Solar Cells Yuliasari, Fitri; Rohmaful Aeni, Alfieta; Fauji, Najmudin; Maulana, Adifalah; Pambudi, Teguh
Jurnal Bio-Geo Material Dan Energi Vol. 6 No. 4 (2026): Journal of Bio-Geo Material and Energy (BiGME), August 2026
Publisher : PUI BiGME Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/m03kg713

Abstract

This study investigates the relationship between optical absorption, photovoltaic performance, and charge transfer properties of dye-sensitized solar cells (DSSCs) sensitized with natural dye extracted from water spinach (Ipomoea aquatica). The DSSC was fabricated with an FTO/TiO2/dye/Mosalyte/Pt/FTO configuration and evaluated on day 1 and day 5 to investigate short-term dye degradation. UV–Vis spectra exhibited a chlorophyll absorption peak at 665.04 nm on day 1, which slightly shifted to 663.13 nm on day 5 with a significant decrease in absorbance intensity, indicating pigment degradation. The bandgap energy remained nearly constant (1.799–1.805 eV), suggesting that the intrinsic electronic structure of the dye was preserved. In contrast, photovoltaic performance deteriorated, with the short-circuit current density (JSC) decreasing from 0.316 to 0.232 mA/cm2 and the power conversion efficiency dropping from 0.109% to 0.064%. Electrochemical impedance spectroscopy (EIS) showed an increase in series resistance (RS) and charge transfer resistance (RCT) at low bias, particularly at 0 V, suggesting hindered interfacial charge transfer. These findings demonstrate that dye degradation primarily reduces light harvesting and charge transfer rather than altering the dye energy levels, resulting in lower DSSC performance. This study highlights the importance of dye stability in improving the efficiency and durability of natural dye-based DSSCs.
Pengembangan Quality Control Phantom Berbahan Akrilik dan Aluminium Alfieta Rohmaful Aeni; Danang Noeramarullah Yudhistira
Jurnal Fisika Unand Vol 15 No 5 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.5.470-475.2026

Abstract

The high cost of phantoms for diagnostic image quality control presents a challenge, especially for hospitals in remote areas. This study developed a low-cost, simplified phantom using acrylic and aluminum materials. Circular acrylic sheets, each 3 mm thick, were stacked into 10 layers and drilled with 15 holes, each filled with aluminum disks of varying thickness from 1 mm to 15 mm. The phantom was exposed to X-rays using tube voltages of 50 kV, 60 kV, and 70 kV for 5 ms at a tube current of 160 mA. The resulting radiographic images were analyzed using ImageJ to assess grayscale values. Results showed that images obtained at 60 kV provided the best contrast, with clear differentiation of aluminum thicknesses and separation from the background. At 50 kV, aluminum layers thicker than 10 mm were not easily distinguishable due to insufficient X-ray energy, while at 70 kV, thinner layers (1–5 mm) lacked visibility due to over-penetration. These findings suggest that the developed phantom is adequately responsive to exposure parameter changes and has potential for use in basic radiographic imaging evaluations and educational settings.
Co-Authors Adelia Natasya Regita Nugroho Adelia Natasya Regita Nugroho Aprivianti, Afif Nur Aulia Wahyuningtyas Aulia Wahyuningtyas Bhisma Mahendra Bima Bagastama Chairunnisa Alwardah Chintya Septa Hasannah Cintiya Septa Hasanah Cintiya Septa Hasannah Daffa Meifan Kusuma Danang Noeramarullah Yudhistira Delima Nainggolan Dessy Agustina Sari Dimas Yuda Eri Widianto Fadhillah, Ghina Nurul Fahmi Hakim, Muhammad Fitri Yuliasari Fitri Yuliasari Gede Bayu Suparta Gede Bayu Suparta Gina Syafitri Nur Hakim, Muhammad Fahmi Hartanti, Adelia Hasanah, Putri Nur Hasannah, Cintya Septa Hayunanda, Vania Hilman Imadul Umam Kaisa Zaskia Syakib Mahendra, Bhisma Marcela Shakila Maulana, Adifalah Meka Saima Perdani Muryanto Muryanto Najmudin Fauji Nur Wahyudi, Mohamad Nurul Fadhillah, Ghina Pangni Fahriani, Vera Perdani, Meka Saima Putri Nur Padilah Rahmat Hidayat Rahmat, Natasya Shafira Putri Retno Utami Retno Utami Rosidah, Cicih Sobur, Susilawati Syahwa, Syahwa Az Zahra Safitri Teguh Pambudi Teguh Pambudi Umi Nuraini, Umi Wahyudi, Mohamad Nur Wahyuningtyas, Aulia Widianto, Eri Wilda, Saniatun Yanni Sudiyani YULIASARI, FITRI