Research of photovoltaic conversion efficiency of silicon cells irradiated by nanosecond laser pulses
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1.
Beijing Area Major Laboratory of Opto-Mechatronic Equipment Technology, Beijing Institute of Petro-Chemical Technology, Beijing 102617, China;
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2.
College of Material Science and Engineering, Beijing University of Technology, Beijing 100124, China
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Received Date:
2012-07-06
Accepted Date:
2012-10-10
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Abstract
The conical microstructures on the silicon wafer surface shaped by irradiating from femtosecond or picosecond laser pulses in SF6 atmosphere was shown and its forming processes were analyzed.The feasibility and necessity were proposed to use nanosecond laser pulses irradiating the surface to enhance some characteristics of the silicon wafer.The forming processes and results of conical microstructures on the silicon wafer surface irradiated by pulsed laser with 6ns width in SF6 atmosphere were described.The silicon wafers both with and without laser pulses treatment were put into product line at the same time to produce silicon solar cell.Then,the two type cells were both measured to compare the photovoltaic conversion efficiency.A preliminary analysis was also given to discuss the experiment results from the point of the surface of silicon wafer.The results showed that the former had higher conversion efficiency in the range of 15% to 25%.
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