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The Effect of Temperature on the Output Characteristics of a Monocrystalline Silicon Solar Cell using the Laser Beam Induced Current/Voltage (LBIC/LBIV) Technique | Kioko | The African Journal of Technology

The Effect of Temperature on the Output Characteristics of a Monocrystalline Silicon Solar Cell using the Laser Beam Induced Current/Voltage (LBIC/LBIV) Technique

S. Kioko, M. Mwamburi

Abstract


Monocrystalline silicon solar cells are the most commonly used type of cells in the market today because they are reliable and have relatively high efficiencies. During their manufacture and utilization defects and other deformities may arise in the cells.  The overall conversion efficiency of a photovoltaic device depends on the efficiency of every point of the photoactive surface. This depends on the underlying microstructure generated during the manufacturing process. Light beam induced current/voltage (LBIC/LBIV) technique can be used to inspect and characterize such defects and deformities very effectively. An LBIC/LBIV system was designed, assembled and used to test a monocrystalline solar cell. Samples of silicon cells were removed from a working PV panel through a delamination process. A 635nm diode laser with a maximum power output intensity of 25mW was used as the primary light source. The maximum power intensity used in this work was set up at 0.6mW. The laser beam was focused onto a cell mounted on a computerized x-y scanning stage. The light induced current data was monitored and collected with Lab View data access system. The effect of temperature on the beam induced currents was studied, with the temperature being varied from 30oC to 130oC. A line scans along the X- axis was performed at intervals of 10oC. The results show that with increasing temperature the induced voltages become more spurious indicating that the defects become more pronounced. The induced voltage tends to increase with increasing temperature up to a maximum temperature of around 100oC and then starts to decrease. Topical defects were mainly found to arise from the top grid metallization method used.

Keywords


monocrystalline; solar cell; LBIC/LBIV; laser beam; photovoltaic

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For more information, contact: The Editor-in-Chief Email: yashon@mu.ac.ke School of Engineering, Moi University Kenya.

The African Journal of Technology
ISSN 1998 – 9350 (Print); ISSN 23135549 (Online)

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