InP nanowire array solar cells achieving 13.8% efficiency by exceeding the ray optics limit
Wallentin J, Anttu N, Asoli D, Huffman M, Aberg I, Magnusson MH, Siefer G, Fuss-Kailuweit P, Dimroth F, Witzigmann B, Xu HQ, Samuelson L, Deppert K, Borgstrom MT (2013)
Publication Type: Journal article
Publication year: 2013
Journal
Book Volume: 339
Pages Range: 1057-1060
Journal Issue: 6123
Abstract
Photovoltaics based on nanowire arrays could reduce cost and materials consumption compared with planar devices but have exhibited low efficiency of light absorption and carrier collection. We fabricated a variety of millimeter-sized arrays of p-type/intrinsic/n-type (p-i-n) doped InP nanowires and found that the nanowire diameter and the length of the top n-segment were critical for cell performance. Efficiencies up to 13.8% (comparable to the record planar InP cell) were achieved by using resonant light trapping in 180-nanometer-diameter nanowires that only covered 12% of the surface. The share of sunlight converted into photocurrent (71%) was six times the limit in a simple ray optics description. Furthermore, the highest open-circuit voltage of 0.906 volt exceeds that of its planar counterpart, despite about 30 times higher surface-to-volume ratio of the nanowire cell.
Authors with CRIS profile
Involved external institutions
Lund University / Lunds universitet
Sweden (SE)
Universität Kassel
Germany (DE)
Fraunhofer-Institut für Solare Energiesysteme (ISE) / Fraunhofer Institute for Solar Energy Systems
Germany (DE)
Sweden (SE)
Universität Kassel
Germany (DE)
Fraunhofer-Institut für Solare Energiesysteme (ISE) / Fraunhofer Institute for Solar Energy Systems
Germany (DE)
How to cite
APA:
Wallentin, J., Anttu, N., Asoli, D., Huffman, M., Aberg, I., Magnusson, M.H.,... Borgstrom, M.T. (2013). InP nanowire array solar cells achieving 13.8% efficiency by exceeding the ray optics limit. Science, 339(6123), 1057-1060. https://dx.doi.org/10.1126/science.1230969
MLA:
Wallentin, Jesper, et al. "InP nanowire array solar cells achieving 13.8% efficiency by exceeding the ray optics limit." Science 339.6123 (2013): 1057-1060.
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