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All Journal Indonesian Journal of Electrical Engineering and Computer Science Journal of Electronics, Telecommunication, Electrical, and Physics Science
Baharuddin Ismail
Universiti Malaysia Perlis
Control & Systems Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Natural Dyes from Roselle Flower as a Sensitizer in Dye-Sensitized Solar Cell (DSSC) Dayang Suriani; Muhammad Irwanto Misrun; Gomesh Nair; Baharuddin Ismail
Indonesian Journal of Electrical Engineering and Computer Science Vol 9, No 1: January 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v9.i1.pp191-197

Abstract

Hibiscus Sabdariffa L. well known as Roselle flower was used as sensitizers for Dye-Sensitized Solar Cell (DSSC). The dyes were extracted using distilled water (DI) and ethanol (E) extract solvent in an ultrasonic cleaner for 30 minutes with a frequency of 37 Hz by using ‘degas’ mode at the temperature of 30°. Doctor blade method was applied in the fabrication of titanium dioxide (TiO2) on ITO glass. Absorption spectra of Roselle dye with different extract solvent were tested using Evolution 201 UV-Vis Spectrophotometer. Fourier-Transform Infrared (FTIR) was used to identify the functional active group in extract dye. Based on FTIR result, the broad absorption at peak 2889 cm-1, 2976 cm-1, and 3366 cm-1 attributed to the O-H stretching which is the presence of hydroxyl group. The use Field Emission Scanning Electron Microscopy (FESEM) and Energy-Dispersive Spectroscopy (EDS) analysis are to characterize the surface morphology and element in the TiO2 thin film.
Comparative Analysis of Earthing Resistance on Rod and Plate Electrodes for Improvement of Earthing Resistance Values Yoga Tri Nugraha; Lidya Rahmani Laia; Baharuddin Ismail
Journal of Electronics, Telecommunication, Electrical, and Physics Science Vol. 1 No. 2 (2022): J. ETAPs (April 2022)
Publisher : ETAPs (Journal Electronics, Telecommunication, Electrical, and Physics Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (393.989 KB) | DOI: 10.20122/etaps.v1i2.3161

Abstract

The availability of a grounding system must have the smallest grounding resistance value. To obtain a grounding resistance value with a certain value is influenced by several factors such as: the shape of the grounding system, soil type, soil temperature, soil moisture, electrode diameter, soil electrolyte content and others. the ground surface, and in the form of plates or plates, all of which are designed to reduce grounding resistance. From the results of measurements and calculations, the value of grounding resistance is obtained from the measurement results above, indicating the depth of the grounding electrode is 1.5 m deep, at this depth the value of grounding resistance is 0.98 Ω. The rod electrode, while the plate electrode is 1.6 Ω. and the calculation of the ground resistance using Dwight's formula, the average value of the rod electrode is 0.9 Ω and the plate, the average value is 0.5 Ω. There is a difference between the results of calculations and measurements this is due to differences in the perception of the type of electrode used. It is < 1 Ω meets the requirements of PUIL, 2000, for wet and moist soil types.
Co-Authors Dayang Suriani Gomesh Nair Gopas Pasaribu Hairus Abdullah Lidya Rahmani Laia M. Irwanto Noorly Evalina Yoga Tri Nugraha