Toward high-efficiency quantum dot solar cells: optimized gratings for ultrathin waveguide devices

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

doi:10.1117/12.863123

24 August 2010 Toward high-efficiency quantum dot solar cells: optimized gratings for ultrathin waveguide devices

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

Author Affiliations +

Proceedings Volume 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion; 777209 (2010) https://doi.org/10.1117/12.863123
Event: SPIE Solar Energy + Technology, 2010, San Diego, California, United States

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.

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Claiborne O. McPheeters, Cory J. Hill, Dongzhi Hu, Swee H. Lim, Daniel Derkacs, David Z. Ting, Daniel M. Schaadt, Sarath D. Gunapala, and Edward T. Yu "Toward high-efficiency quantum dot solar cells: optimized gratings for ultrathin waveguide devices", Proc. SPIE 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion, 777209 (24 August 2010); https://doi.org/10.1117/12.863123

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