Advanced Concepts and Applications

Simulations of solar cell absorption enhancement using resonant modes of a nanosphere array

[+] Author Affiliations
Jonathan Grandidier, Michael G. Deceglie, Dennis M. Callahan

California Institute of Technology, Thomas J. Watson Laboratories of Applied Physics, Pasadena, California 91125

Harry A. Atwater

California Institute of Technology, Thomas J. Watson Laboratories of Applied Physics, Pasadena, California 91125

California Institute of Technology, J. Kavli Nanoscience Institute, Pasadena, California 91125

J. Photon. Energy. 2(1), 024502 (May 16, 2012). doi:10.1117/1.JPE.2.024502
History: Received January 30, 2012; Revised February 28, 2012; Accepted March 13, 2012
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Abstract.  We propose an approach for enhancing the absorption of thin-film amorphous silicon solar cells using periodic arrangements of resonant dielectric nanospheres deposited as a continuous film on top of a thin planar cell. We numerically demonstrate this enhancement using three dimensional (3D) full field, finite difference time domain simulations and 3D finite element device physics simulations of a nanosphere array above a thin-film amorphous silicon solar cell structure featuring back reflector and anti-reflection coating. In addition, we use the full field finite difference time domain results as input to finite element device physics simulations to demonstrate that the enhanced absorption contributes to the current extracted from the device. We study the influence of a multi-sized array of spheres, compare spheres and domes, and propose an analytical model based on the temporal coupled mode theory.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Jonathan Grandidier ; Michael G. Deceglie ; Dennis M. Callahan and Harry A. Atwater
"Simulations of solar cell absorption enhancement using resonant modes of a nanosphere array", J. Photon. Energy. 2(1), 024502 (May 16, 2012). ; http://dx.doi.org/10.1117/1.JPE.2.024502


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