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All Journal e-Journal BUDIDAYA PERAIRAN Journal of Physics: Theories and Applications
Pingki, Tamara
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Education Environmental Science Materials Science & Nanotechnology Physics

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Analisis kualitas air sungai berdasarkan ketinggian sungai Bladak dan Sungai Kedungrawis di Kabupaten Blitar Pingki, Tamara; ., Sudarti
e-Journal BUDIDAYA PERAIRAN Vol 9, No 2 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/bdp.9.2.2021.35364

Abstract

The purpose of this study was to analyze the quality of river water based on differences in height, namely in rivers with an altitude of ± 349 in Nglegok District and rivers with an altitude of ± 252 in Kademangan District, Blitar Regency. Measurement of river water brightness using Sechhi Disk. Measurement of temperature, pH and TDS is carried out by measuring river water samples taken. Based on the data analysis that has been carried out and explained, the quality of river water will be inversely proportional to the temperature and TDS value. Meanwhile, the quality of river water is directly proportional to the brightness and pH. The water temperature in the Bladak River is cooler or lower than the water temperature in the Kedungrawis River. The water in the Bladak River is brighter than the water in the Kedungrawis River. The pH of the water in the Bladak River is higher or more alkaline than the pH of the water in the Kedungrawis River. The Total Dissolved Solid (TDS) value in the Bladak River is smaller than the TDS value in the Kedungrawis River
Theoretical study of the II-VI solar cells semiconductor material arrangements effect using the one-dimensional Schrodinger equation Pingki, Tamara; Dafik, Dafik; Supriadi, Bambang
Journal of Physics: Theories and Applications Vol 8, No 2 (2024): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v8i2.82285

Abstract

Solar cells are electronic devices that function to convert light energy from sun into electrical energy. Solar cells can work well if the materials used are also right so they can absorb light energy to the maximum. The solar cell materials used in this study are II-VI semiconductors, there are CdS (P), CdSe (Q), and CdTe (R). The purpose of this study was to find the combination of materials has the largest transmission coefficient which was analyzed using the Schrodinger equation (analytic) and Matlab R2022a (numeric). The greater the transmission coefficient, the greater the light energy absorbed by the solar cells, so that the generated electrical energy is also greater. The materials are arranged into 3 uniform arrangements and 6 combined arrangements with a maximum electron energy of 1 eV. The results showed that the largest transmission coefficient in the CdS array was 0.9925 at 1.0000 eV, the largest transmission coefficient in the CdSe array was 1.0000 at 0.8140 eV, and the largest transmission coefficient in the CdTe array was 1.0000 at 0.7330 eV. Meanwhile, in the combined arrangement, the biggest transmission value is 0.9823 at 0.9570 eV in the QPR and RPQ arrangements.
Co-Authors Bambang Supriadi D. Dafik Sudarti Sudarti