NDLI: Combined optical and electrical design of plasmonic back reflector for high-efficiency thin-film silicon solar cells

Content Provider	IEEE Xplore Digital Library
Author	Tan, Hairen Santbergen, Rudi Guangtao Yang Smets, Arno H. M. Zeman, Miro
Copyright Year	2012
Description	Author affiliation: Photovoltaic Materials and Devices Laboratory, Delft University of Technology, 2628 CD, The Netherlands (Tan, Hairen; Santbergen, Rudi; Guangtao Yang; Smets, Arno H. M.; Zeman, Miro)
Abstract	A back reflector (BR) that can efficiently scatter weakly absorbed light is essential to obtain high-efficiency thin-film silicon solar cells. We present the design routes of plasmonic BR based on self-assembled silver nanoparticles (Ag NPs) for high-efficiency thin-film silicon solar cells. Both optical and electrical effects on solar cells are considered. The shape of Ag NPs, the thickness of ZnO:Al spacer layers,materials on top of Ag NPs, and nanoparticle size are crucial for the performance of plasmonic BR. Increased annealing temperature lead to the formation of more appropriate shapes (more spherical and regular shapes) for a good light scattering and, thus, increase the photocurrent. The ZnO:Al layer between the Ag NPs and the Ag planar film has an optical effect on solar cells, while the ZnO:Al layer between the Ag NPs and the doped a-Si:H has both optical and electrical influence on the device. Larger NPs have less parasitic absorption and can preferentially scatter light into larger angles, thus increasing the spectral response in the solar cell. However, for larger Ag NPs, the fill factor deteriorates due to the rougher surface in the plasmonic BR, indicating a compromise between light trapping and electrical performance. Following the design routes, we obtained 8.4% high-efficiency plasmonic a-Si:H solar cell.
Starting Page	1
Ending Page	6
File Size	587772
Page Count	6
File Format	PDF
DOI	10.1109/PVSC-Vol2.2012.6656786
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasmons Photovoltaic cells Absorption Nanoparticles Charge carrier processes Optical scattering thin-film silicon (TF-Si) solar cells Light trapping plasmonic back reflector silver nanoparticles
Content Type	Text
Resource Type	Article

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