Optimization of back reflector for high efficiency hydrogenated nanocrystalline silicon solar cells
- 28 December 2009
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 95 (26), 263501
- https://doi.org/10.1063/1.3279143
Abstract
We have studied the effect of texture in Ag/ZnO back reflectors (BRs) on the performance of hydrogenated nanocrystallinesilicon (nc-Si:H) solar cells. While a larger texture provides superior light trapping, it also deteriorates the nc-Si:H quality. We have used total and diffused reflection and atomic force microscopy to evaluate the BR texture. A BR with textured Ag and thin ZnO layers has been found to give the best cell performance. Using the optimized BR, we have achieved an initial active-area efficiency of 10.2% in a nc-Si:H single-junction cell and a stable total-area efficiency of 12.5% in a hydrogenated amorphous silicon/nc-Si:H/nc-Si:H triple-junction cell.Keywords
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