Nano Archive

Photovoltaic measurements in single-nanowire silicon solar cells

Kelzenberg, Michael D. and Turner-Evans, Daniel B. and Kayes, Brendan M. and Filler, Michael A. and Putnam, Morgan C. and Lewis, Nathan S. and Atwater, Harry A. (2008) Photovoltaic measurements in single-nanowire silicon solar cells. NANO LETTERS, 8 (2). pp. 710-714.

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Single-nanowire solar cells were created by forming rectifying junctions in electrically contacted vapor-liquid-solid-grown Si nanowires. The nanowires had diameters in the range of 200 nm to 1.5 mu m. Dark and light current-voltage measurements were made under simulated Air Mass 1.5 global illumination. Photovoltaic spectral response measurements were also performed. Scanning photocurrent microscopy indicated that the Si nanowire devices had minority carrier diffusion lengths of similar to 2 mu m. Assuming bulk-dominated recombination, this value corresponds to a minimum carrier lifetime of similar to 15 ns, or assuming surface-dominated recombination, to a maximum surface recombination velocity of approximately 1350 cm s(-1). The methods described herein comprise a valuable platform for measuring the properties of semiconductor nanowires, and are expected to be instrumental when designing an efficient macroscopic solar cell based on arrays of such nanostructures.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Technology > Nanotechnology and energy applications
Physical Science > Photonics
ID Code:421
Deposited By:Farnush Anwar
Deposited On:12 Dec 2008 01:05
Last Modified:12 Dec 2008 01:05

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