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Effectively transparent contacts (ETCs) for solar cells

Saive, Rebecca and Bukowsky, Colton R. and Yalamanchili, Sisir and Boccard, Mathieu and Saenz, Theresa and Borsuk, Aleca M. and Holman, Zachary and Atwater, Harry A. (2016) Effectively transparent contacts (ETCs) for solar cells. In: 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC). IEEE , Piscataway, NJ, pp. 3612-3615. ISBN 9781509027248.

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We have developed effectively transparent contacts (ETCs) that allow for increased current in heterojunction solar cells. Micro-meter scaled triangular cross-section grid fingers with micro-meter scaled distance redirect light efficiently to the active area of the solar cell and hence, omit losses through reflection at the front finger grid. Furthermore, the grid fingers are placed close together such that only a very thin layer of transparent conductive oxides (TCO) is necessary which avoids parasitic absorption and can decrease material costs. In this paper we experimentally show current enhancement of ~2 mA/cm^2 in silicon heterojunction solar cells using ETCs. 1 mA/cm^2 is gained through less parasitic absorption and 1 mA/cm^2 is gained by efficient redirection of light and therefore, absent shadowing losses.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Saive, Rebecca0000-0001-7420-9155
Bukowsky, Colton R.0000-0003-3577-8050
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2016 IEEE. This material was based upon work supported by the U.S. Department of Energy through the Bay Area Photovoltaic Consortium under Award Number DE-EE0004946 and by the Engineering Research Center Program of the National Science Foundation and the Office of Energy Efficiency and Renewable Energy of the Department of Energy under NSF Cooperative Agreement No. EEC-1041895. Authors and their work presented herein are funded in part by the Department of Energy, Energy Efficiency and Renewable Energy Program, under Award Number DE-EE0006335. Any opinions, findings and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect those of the National Science Foundation or Department of Energy. S.Y. acknowledges the Kavli Nanoscience Institute and the Joint Center for Artificial Photosynthesis.
Group:JCAP, Kavli Nanoscience Institute
Funding AgencyGrant Number
Department of Energy (DOE)DE-EE0004946
Department of Energy (DOE)DE-EE0006335
Kavli Nanoscience InstituteUNSPECIFIED
Joint Center for Artificial Photosynthesis (JCAP)UNSPECIFIED
Subject Keywords:Effectively Transparent Contacts, Silicon Heterojunction Solar Cells, Three-Dimensional Printing
Record Number:CaltechAUTHORS:20190308-082250884
Persistent URL:
Official Citation:R. Saive et al., "Effectively transparent contacts (ETCs) for solar cells," 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC), Portland, OR, 2016, pp. 3612-3615. doi: 10.1109/PVSC.2016.7750346
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93642
Deposited By: Tony Diaz
Deposited On:08 Mar 2019 16:40
Last Modified:16 Nov 2021 16:59

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