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Accounting for Localized Defects in the Optoelectronic Design of Thin-Film Solar Cells

Deceglie, Michael G. and Ferry, Vivian E. and Alivisatos, A. Paul and Atwater, Harry A. (2013) Accounting for Localized Defects in the Optoelectronic Design of Thin-Film Solar Cells. IEEE Journal of Photovoltaics, 3 (2). pp. 599-604. ISSN 2156-3381. http://resolver.caltech.edu/CaltechAUTHORS:20130606-101200534

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Abstract

Controlled nanostructuring of thin-film solar cells offers a promising route toward increased efficiency through improved light trapping. Many such light trapping designs involve structuring of the active region itself. Optimization of these designs is aided by the use of computer simulations that account for both the optics and electronics of the device. We describe such a simulation-based approach that accounts for experimental tradeoffs between high-aspect ratio structuring and electronic material quality. Our model explicitly accounts for localized regions of degraded material quality that is induced by light trapping structures in n-i-p a-Si:H solar cells. We find that the geometry of the defects couples to the geometry of light absorption profiles in the active region and that this coupling impacts the spectral response of the device. Our approach yields insights into the nanoscale device physics that is associated with localized geometry-induced defects and provides a framework for full optoelectronic optimization.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1109/JPHOTOV.2013.2240764DOIArticle
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6450024PublisherArticle
ORCID:
AuthorORCID
Alivisatos, A. Paul0000-0001-6895-9048
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2013 IEEE. Open Access. Manuscript received May 22, 2012; accepted January 8, 2013. Date of publication February 5, 2013; date of current version March 18, 2013. This work was supported by the “Light–Material Interactions in Energy Conversion” Energy Frontiers Research Center, United States Department of Energy, under grant DE-SC0001293, LBL Contract DE-AC02–05CH11231. The work of M. G. Deceglie was supported by the Office of Basic Energy Sciences under Contract DOE DE-FG02–07ER46405 and the National Central University’s Energy Research Collaboration. The authors would like to thank M. Kelzenberg and D. Turner-Evans for useful discussions regarding technical aspects of the simulations.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0001293
Department of Energy (DOE)DE-AC02-05CH11231
Department of Energy (DOE)DE-FG02-07ER46405
National Central University Energy Research CollaborationUNSPECIFIED
Subject Keywords:Light trapping; plasmon; simulation; thin-film solar cell
Record Number:CaltechAUTHORS:20130606-101200534
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130606-101200534
Official Citation:Deceglie, M.G.; Ferry, V.E.; Alivisatos, A.P.; Atwater, H.A., "Accounting for Localized Defects in the Optoelectronic Design of Thin-Film Solar Cells," Photovoltaics, IEEE Journal of , vol.3, no.2, pp.599,604, April 2013 doi: 10.1109/JPHOTOV.2013.2240764
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38831
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:11 Jun 2013 23:08
Last Modified:26 Sep 2017 21:48

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