Effectively transparent contacts (ETCs) for solar cells

R. Saive, C.R. Bukowsky, S. Yalamanchili, M. Boccard, T. Saenz, A.M. Borsuk, Z. Holman, H.A. Atwater

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

1 Citation (Scopus)


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.
Original languageEnglish
Title of host publication2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017
ISBN (Electronic)978-1-5090-2724-8
Publication statusPublished - 21 Nov 2016
Externally publishedYes
Event43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 - Oregon Convention Center, Portland, United States
Duration: 5 Jun 201610 Jun 2016
Conference number: 43


Conference43rd IEEE Photovoltaic Specialists Conference, PVSC 2016
Abbreviated titlePVSC
Country/TerritoryUnited States


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