Ahmed Kagilik - Academia.edu (original) (raw)

Papers by Ahmed Kagilik

Research paper thumbnail of Technology and fundaments of dry etching

Research paper thumbnail of Photovoltaic Power Supply for Water Pumping Systems

ABSTRACT PV systems for water pumping are today the most appropriate and successful applications,... more ABSTRACT PV systems for water pumping are today the most appropriate and successful applications, especially in remote and isolated regions. These regions are characterized by low energy needs, and a high level of solar radiation. In this paper, an approach to utilize the PV systems in water pumping in Libya is introduced. The program includes the installation of 50 PV pumping systems in different isolated areas. The PV array sizes and sub-systems are optimised in terms of the water requirements, well depth and solar radiation at each site. The system performance is obtained throughout the year. From the performance, the higher water output occurs during the summer season in which the water consumption is highest.

Research paper thumbnail of Performance Analysis of 14 MW Grid-Connected Photovoltaic System

World Conference on Photovoltaic Energy Conversion, Nov 22, 2013

Many Libyan authorities proposed to investigate the possibility of utilizing a suitable terrain i... more Many Libyan authorities proposed to investigate the possibility of utilizing a suitable terrain in Libya to add generation capacity of large-scale photovoltaic power plants.

Research paper thumbnail of Effect of short-wavelength radiation on the photoresponse of MIS-IL solar cells (experimental study)

Applied Energy, Apr 1, 2000

MIS-IL solar cells are potentially low-cost devices, due to their simplicity and avoidance of the... more MIS-IL solar cells are potentially low-cost devices, due to their simplicity and avoidance of the high-temperatures in their fabrication processing. In addition, inversion-layer (IL) solar cells are demonstrated to have higher collection efficiencies at short wavelengths. The spectral response of MIS-IL solar cells has been measured in the wavelength range 340-1100 nm. From these measurements, the external and internal quantum efficiencies have been determined. Also, a comparative study of the quantum efficiencies of inversion layer and diffused junction cells has been carried out. The IL cell has a higher collection-efficiency for carriers generated by ultra-violet light than the conventional p-n junction solar cell. These results reveal one of the important advantages of IL solar cells. Also, it can be seen that IL solar cells can be improved by surface texturing in a similar way to a conventional diffused solar cells.

Research paper thumbnail of Dry Phosphorus silicate glass etching and surface conditioning and cleaning for multi-crystalline silicon solar cell processing

Solar energy and sustainable development, 2014

As an alternative to the wet chemical etching method, dry chemical etching processes for Phosphor... more As an alternative to the wet chemical etching method, dry chemical etching processes for Phosphorus silicate glass [PSG} layer rel11ova] using Trifluormethane/Sulfur Hexafluoride (CHF3/ SF6) gas mixture in commercial silicon-nitride plasma enhanced chemical vapour deposition (SiN-PECVD) system is applied. The dependence of the solar cell performance on the etching temperature is investigated and optimized. It is found that the SiN-PECVD system temperature variation has a significant impact on the whole solar cell characteristics. A dry plasma cleaning treatment of the Si wafer surface after the PSG removal step is also investigated and developed. The cleaning step is used to remove the polymer film which is formed during the PSG etching using both oxygen and hydrogen gases. By applying an additional cleaning step, the polymer film deposited on the silicon wafer surface after PSG etching is eliminated. The effect of different plasma cleaning conditions on solar cell performance is in...

Research paper thumbnail of Performance Analysis of 14 MW Grid-Connected Photovoltaic System Solar Energy And Sustainable Development Refereed, biannual scientific journal issued by Center for Solar Energy Research and Studies Kagilik A, and Tawel A

Many Libyan authorities proposed to investigate the possibility of utilizing a suitable terrain i... more Many Libyan authorities proposed to investigate the possibility of utilizing a suitable terrain in Libya to add generation capacity of large-scale photovoltaic power plants. In this paper, the first grid-connected PV plant of 14 MWp which will be executed in Hoon

Research paper thumbnail of Dry Phosphorus silicate glass etching and surface conditioning and cleaning for multi-crystalline silicon solar cell processing

Solar Energy and Sustainable Development Journal

As an alternative to the wet chemical etching method, dry chemical etching processes for Phosphor... more As an alternative to the wet chemical etching method, dry chemical etching processes for Phosphorus silicate glass (PSG) layer removal using Trifuormethane /Sulfur Hexafuoride (CHF 3/SF6) gas mixture in commercial silicon-nitride plasma enhanced chemical vapour deposition (SiN-PECVD) system is applied. T e dependence of the solar cell performance on the etching temperature is investigated and optimized. It is found that the SiN-PECVD system temperature variation has a significant impact on the whole solar cell characteristics. A dry plasma cleaning treatment of the Si wafer surface after the PSG removal step is also investigated and developed. The cleaning step is used to remove the polymer f lm which is formed during the PSG etching using both oxygen and hydrogen gases.By applying an additional cleaning step, the polymer film is deposited on the silicon wafer surface after PSG etching is eliminated. T e effect of different plasma cleaning conditions on solar cell performance is inv...

Research paper thumbnail of Investment Promotion in Renewable Energy in Libya; Vision & Methodology

Research paper thumbnail of Technology and fundaments of dry etching

Research paper thumbnail of Photovoltaic Power Supply for Water Pumping Systems

ABSTRACT PV systems for water pumping are today the most appropriate and successful applications,... more ABSTRACT PV systems for water pumping are today the most appropriate and successful applications, especially in remote and isolated regions. These regions are characterized by low energy needs, and a high level of solar radiation. In this paper, an approach to utilize the PV systems in water pumping in Libya is introduced. The program includes the installation of 50 PV pumping systems in different isolated areas. The PV array sizes and sub-systems are optimised in terms of the water requirements, well depth and solar radiation at each site. The system performance is obtained throughout the year. From the performance, the higher water output occurs during the summer season in which the water consumption is highest.

Research paper thumbnail of Performance Analysis of 14 MW Grid-Connected Photovoltaic System

World Conference on Photovoltaic Energy Conversion, Nov 22, 2013

Many Libyan authorities proposed to investigate the possibility of utilizing a suitable terrain i... more Many Libyan authorities proposed to investigate the possibility of utilizing a suitable terrain in Libya to add generation capacity of large-scale photovoltaic power plants.

Research paper thumbnail of Effect of short-wavelength radiation on the photoresponse of MIS-IL solar cells (experimental study)

Applied Energy, Apr 1, 2000

MIS-IL solar cells are potentially low-cost devices, due to their simplicity and avoidance of the... more MIS-IL solar cells are potentially low-cost devices, due to their simplicity and avoidance of the high-temperatures in their fabrication processing. In addition, inversion-layer (IL) solar cells are demonstrated to have higher collection efficiencies at short wavelengths. The spectral response of MIS-IL solar cells has been measured in the wavelength range 340-1100 nm. From these measurements, the external and internal quantum efficiencies have been determined. Also, a comparative study of the quantum efficiencies of inversion layer and diffused junction cells has been carried out. The IL cell has a higher collection-efficiency for carriers generated by ultra-violet light than the conventional p-n junction solar cell. These results reveal one of the important advantages of IL solar cells. Also, it can be seen that IL solar cells can be improved by surface texturing in a similar way to a conventional diffused solar cells.

Research paper thumbnail of Dry Phosphorus silicate glass etching and surface conditioning and cleaning for multi-crystalline silicon solar cell processing

Solar energy and sustainable development, 2014

As an alternative to the wet chemical etching method, dry chemical etching processes for Phosphor... more As an alternative to the wet chemical etching method, dry chemical etching processes for Phosphorus silicate glass [PSG} layer rel11ova] using Trifluormethane/Sulfur Hexafluoride (CHF3/ SF6) gas mixture in commercial silicon-nitride plasma enhanced chemical vapour deposition (SiN-PECVD) system is applied. The dependence of the solar cell performance on the etching temperature is investigated and optimized. It is found that the SiN-PECVD system temperature variation has a significant impact on the whole solar cell characteristics. A dry plasma cleaning treatment of the Si wafer surface after the PSG removal step is also investigated and developed. The cleaning step is used to remove the polymer film which is formed during the PSG etching using both oxygen and hydrogen gases. By applying an additional cleaning step, the polymer film deposited on the silicon wafer surface after PSG etching is eliminated. The effect of different plasma cleaning conditions on solar cell performance is in...

Research paper thumbnail of Performance Analysis of 14 MW Grid-Connected Photovoltaic System Solar Energy And Sustainable Development Refereed, biannual scientific journal issued by Center for Solar Energy Research and Studies Kagilik A, and Tawel A

Many Libyan authorities proposed to investigate the possibility of utilizing a suitable terrain i... more Many Libyan authorities proposed to investigate the possibility of utilizing a suitable terrain in Libya to add generation capacity of large-scale photovoltaic power plants. In this paper, the first grid-connected PV plant of 14 MWp which will be executed in Hoon

Research paper thumbnail of Dry Phosphorus silicate glass etching and surface conditioning and cleaning for multi-crystalline silicon solar cell processing

Solar Energy and Sustainable Development Journal

As an alternative to the wet chemical etching method, dry chemical etching processes for Phosphor... more As an alternative to the wet chemical etching method, dry chemical etching processes for Phosphorus silicate glass (PSG) layer removal using Trifuormethane /Sulfur Hexafuoride (CHF 3/SF6) gas mixture in commercial silicon-nitride plasma enhanced chemical vapour deposition (SiN-PECVD) system is applied. T e dependence of the solar cell performance on the etching temperature is investigated and optimized. It is found that the SiN-PECVD system temperature variation has a significant impact on the whole solar cell characteristics. A dry plasma cleaning treatment of the Si wafer surface after the PSG removal step is also investigated and developed. The cleaning step is used to remove the polymer f lm which is formed during the PSG etching using both oxygen and hydrogen gases.By applying an additional cleaning step, the polymer film is deposited on the silicon wafer surface after PSG etching is eliminated. T e effect of different plasma cleaning conditions on solar cell performance is inv...

Research paper thumbnail of Investment Promotion in Renewable Energy in Libya; Vision & Methodology