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Monocrystalline silicon solar cells applied in photovoltaic system

Dobrzański L. A., Drygała A., Giedroć M., Macek M.

Journal of Achievements in Materials and Manufacturing Engineering

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2012

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Vol. 53, nr 1

7--13

EN

Purpose: The aim of the paper is to fabricate the monocrystalline silicon solar cells using the conventional technology by means of screen printing process and to make of them photovoltaic system. Design/methodology/approach: The investigation of current - voltage characteristic to determinate basic electrical properties of monocrystalline silicon solar cells were investigated under Standard Test Condition. Photovoltaic module was produced from solar cells with the largest short-circuit current, which were joined in series. Findings: This work presents a conventional technological process by means of screen printed method of monocrystalline silicon solar cells production. In order to obtain a device producing an electrical energy, solar cells were connected in a photovoltaic module. Then protected from damages by Schottky and Zener diodes. Practical implications: The module was used to build a demonstration photovoltaic system - traffic light - pedestrian crossing, which shows the practical use of widely available, renewable energy source which is the Sun. Originality/value: The key to solve ecological problems, which are effects of mass combustion of fossil fuel such as: coal and crude oil is development of renewable energy technology like photovoltaic energy.

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Investigation of various properties of monocrystalline silicon solar cell

Dobrzański L. A., Musztyfaga M., Giedroć M., Panek P.

Journal of Achievements in Materials and Manufacturing Engineering

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2012

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Vol. 55, nr 2

307--315

EN

Purpose: The aim of the paper was to apply Sherescan instrument, which is a valuable tool used for fault detection, error diagnosis and process optimization by cell manufacturers, paste suppliers, institutes and universities all over the world. Design/methodology/approach: Screen printed front side contacts and next to co-fired them in the infrared conveyor furnace were carried out at 920°C temperature. A commercial silver paste to form front side metallization was apply into investigations. The investigations were carried out on monocrystalline silicon wafers. Front side metallization of solar cell was formed on textured surface with coated antireflection layer. Investigated were both surface topography and cross section of front contacts using the SEM microscope. The size of textured silicon surface was measured using the AFM microscope. The thickness of tested front contacts was measured using SEM and CLSM microscope. The metal resistance of solar cells was investigated using the ‘Sherescan’ instrument. The I-V characteristics of solar cells were also investigated. Findings: The technological recommendations for the co-firing technology in order to produce a uniformly melted structure, well adhering to the substrate, with the low resistance of the front electrode-to-substrate joint zone. Research limitations/implications: The resistance of the metal-semiconductor connection zone depends on conductive paste composition from which the paths were made, as well as manufacturing conditions. Originality/value: The influence of the obtained front side metallization features on electrical properties of solar cell was estimated.

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Application of crystalline silicon solar cells in photovoltaic modules

Dobrzański L. A., Drygała A., Giedroć M.

Archives of Materials Science and Engineering

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2010

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Vol. 44, nr 2

96-103

EN

Purpose: The aim of the paper is to determinate basic electrical properties of solar cells, made of them photovoltaic module and analysis of its main electrical parameters. Design/methodology/approach: In this study, several methods were used: current - voltage characteristic to determinate basic electrical properties of 36 monocrystalline silicon solar cells, soft soldering technique to bond solar cells . Photovoltaic module was produced from 31 solar cells with the largest short-circuit current, which were joined in series. Findings: In order to obtain a device producing an electrical current with a higher current and voltage level, solar cells were connected in a photovoltaic module and then protected from damages derived from external factors. In series connection solar cell with the lowest current determines the current flowing in the PV module. Taking this fact into account the analysis of photovoltaic module construction was performed. Practical implications: Because of low operating cost and simplicity of photovoltaic installation, photovoltaic technology is perfectly suitable for supplying objects which are beyond powers network range as well as connected to it. In many cases, they are less costly option than a direct extension of the power network. Originality/value: Protecting the environment from degradation due to pollution, which has source in conventional power industry, as well as diminishing resources of fossil fuels, tend to increase development of renewable energy production such as photovoltaic technology.