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Proceedings Paper

Toward high-efficiency quantum dot solar cells: optimized gratings for ultrathin waveguide devices
Author(s): Claiborne O. McPheeters; Cory J. Hill; Dongzhi Hu; Swee H. Lim; Daniel Derkacs; David Z. Ting; Daniel M. Schaadt; Sarath D. Gunapala; Edward T. Yu
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Paper Abstract

We report progress in developing optimized diffraction gratings for coupling solar radiation from the airmass 0 spectrum into waveguide modes of ultrathin quantum dot solar cells (QDSCs). Electromagnetic simulations have been used to optimize the grating geometry and to analyze the nature of diffraction within the device structure. These results suggest that increases in photocurrent of over 100% at wavelengths of QD absorption, corresponding to over 10% improvement in short-circuit current, can be achieved in optimal ultrathin devices by incorporating gratings in the rear contact.

Paper Details

Date Published: 24 August 2010
PDF: 7 pages
Proc. SPIE 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion, 777209 (24 August 2010); doi: 10.1117/12.863123
Show Author Affiliations
Claiborne O. McPheeters, The Univ. of Texas at Austin (United States)
Cory J. Hill, Jet Propulsion Lab. (United States)
Dongzhi Hu, Karlsruhe Institute of Technology (Germany)
Swee H. Lim, Arizona State Univ. (United States)
Daniel Derkacs, Solar Junction Inc. (United States)
David Z. Ting, Jet Propulsion Lab. (United States)
Daniel M. Schaadt, Karlsruhe Institute of Technology (Germany)
Sarath D. Gunapala, Jet Propulsion Lab. (United States)
Edward T. Yu, Univ. of Texas at Austin (United States)

Published in SPIE Proceedings Vol. 7772:
Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion
Loucas Tsakalakos, Editor(s)

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