20·5% efficient silicon solar cell with a low temperature rear side process using laser‐fired contacts |
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Authors: | W. Brendle,V. X. Nguyen,A. Grohe,E. Schneiderlö chner,U. Rau,G. Palfinger,J. H. Werner |
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Abstract: | The paper presents a rear side structure for crystalline silicon solar cells, which is processed at a maximum temperature of 220°C. Using two different material compositions for electrical and optical needs, the layer system has excellent passivation properties, enhances light trapping and allows for a good ohmic contact. With this structure we achieve an independently confirmed conversion efficiency η=20·5% on a 250 μm thick silicon solar cell. Due to the fact that the maximum process temperature is 220°C, this layer system enables new solar cell concepts. Copyright © 2006 John Wiley & Sons, Ltd. |
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Keywords: | passivation amorphous silicon light trapping silicon nitride |
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