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Total Internal Reflection for Effectively Transparent Solar Cell Contacts

Jahelka, Phillip and Saive, Rebecca and Atwater, Harry (2016) Total Internal Reflection for Effectively Transparent Solar Cell Contacts. , Pasadena, CA. (Submitted)

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A new strategy for eliminating photocurrent losses due to the metal contacts on the front of a solar cell was proposed, simulated, and tested. By placing triangular cross-section lines of low refractive index on top of the contacts, total-internal reflection at the interface of the low-index triangles and the surrounding material can direct light away from the metal and into the photoactive absorber. Simulations indicated that losses can be eliminated for any incident angle, and that yearly energy production improvements commensurate with the metallized area are possible. Proof of principle experiments were carried out to eliminate the reflective losses of a commercial solar cell's busbar contact. Spatially resolved laser beam induced current measurements demonstrated that reflection losses due to the busbar were reduced by voids with triangular cross-section.

Item Type:Report or Paper (Discussion Paper)
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URLURL TypeDescription Paper
Jahelka, Phillip0000-0002-1460-7933
Saive, Rebecca0000-0001-7420-9155
Atwater, Harry0000-0001-9435-0201
Additional Information:The authors would like to thank John Lloyd for helpful discussions while setting up the LightTools simulations. This material is based upon work primarily supported 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. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect those of the National Science Foundation or Department of Energy.
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Record Number:CaltechAUTHORS:20161114-104936050
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71988
Deposited By: Tony Diaz
Deposited On:15 Nov 2016 23:47
Last Modified:02 Jun 2023 00:26

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