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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 19, Iss. S4 — Jul. 4, 2011
  • pp: A686–A694

High-performance laterally-arranged multiple-bandgap solar cells using spatially composition-graded CdxPb1-xS nanowires on a single substrate: a design study

D. A. Caselli and C. Z. Ning  »View Author Affiliations


Optics Express, Vol. 19, Issue S4, pp. A686-A694 (2011)
http://dx.doi.org/10.1364/OE.19.00A686


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Abstract

In this paper, laterally arranged multiple bandgap (LAMB) solar cells based on CdxPb1-xS alloy nanowires of varying composition on a single substrate are designed to be used together with a dispersive concentrator. Simulation results for a design with six subcells in series connection are presented. The design is based on a unique materials capability achieved in our recent research. An efficiency of 34.9% was obtained for operation without solar concentration, which increased to 40.5%, 41.7%, and 42.7% for concentration ratios of 25, 100, and 240 respectively. The device was also simulated with decreased carrier mobilities to model the possible reduction in absorber conductivity, depending on the nanowire geometry and configuration. For a concentration ratio of unity, decreasing the mobilities to 25% of their original values caused less than a 2.5% absolute drop in efficiency. The LAMB design offers the advantages of an integrated cell platform and the potential for low-cost, high efficiency photovoltaic systems.

© 2011 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(350.6050) Other areas of optics : Solar energy

ToC Category:
Solar Concentrators

History
Original Manuscript: February 9, 2011
Revised Manuscript: May 14, 2011
Manuscript Accepted: May 14, 2011
Published: May 17, 2011

Citation
D. A. Caselli and C. Z. Ning, "High-performance laterally-arranged multiple-bandgap solar cells using spatially composition-graded CdxPb1-xS nanowires on a single substrate: a design study," Opt. Express 19, A686-A694 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-S4-A686


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