GaP/Si Heterojunction Solar Cells: An Interface, Doping and Morphology Study

Rebecca Saive; Hal Emmer; Christopher T. Chen; Chaomin Zhang; Christiana Honsberg; Harry Atwater

doi:10.1109/PVSC.2018.8547704

GaP/Si Heterojunction Solar Cells: An Interface, Doping and Morphology Study

Rebecca Saive, Hal Emmer, Christopher T. Chen, Chaomin Zhang, Christiana Honsberg, Harry Atwater

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We report on an study of the GaP/Si interface for application in silicon heterojunction solar cells. We analyzed the band alignment using X-ray photoelectron spectroscopy (XPS) and cross-sectional Kelvin probe force microscopy (x-KPFM). Our measurements show a high conduction band offset (0.9 eV) leading to a barrier in electron extraction which we microscopically resolved via x-KPFM. XPS reveals the presence of Si-Ga bonds which explains the observed interface dipole that leads to low open circuit voltage and low fill factor in GaP/Si heterojunction solar cells. Furthermore, we investigated the electronic and morphologic changes in GaP upon Si and Mg doping.

Original language	English (US)
Title of host publication	2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2064-2069
Number of pages	6
ISBN (Electronic)	9781538685297
DOIs	https://doi.org/10.1109/PVSC.2018.8547704
State	Published - Nov 26 2018
Event	7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - Waikoloa Village, United States Duration: Jun 10 2018 → Jun 15 2018

Other

Other	7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018
Country	United States
City	Waikoloa Village
Period	6/10/18 → 6/15/18

Keywords

band alignment
doping
Gallium Phosphide
morphology
Silicon heterojunction

ASJC Scopus subject areas

Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials

Access to Document

10.1109/PVSC.2018.8547704

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Cite this

Saive, R., Emmer, H., Chen, C. T., Zhang, C., Honsberg, C., & Atwater, H. (2018). GaP/Si Heterojunction Solar Cells: An Interface, Doping and Morphology Study. In 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC (pp. 2064-2069). [8547704] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2018.8547704

GaP/Si Heterojunction Solar Cells : An Interface, Doping and Morphology Study. / Saive, Rebecca; Emmer, Hal; Chen, Christopher T.; Zhang, Chaomin; Honsberg, Christiana; Atwater, Harry.

2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC. Institute of Electrical and Electronics Engineers Inc., 2018. p. 2064-2069 8547704.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Saive, R, Emmer, H, Chen, CT, Zhang, C, Honsberg, C & Atwater, H 2018, GaP/Si Heterojunction Solar Cells: An Interface, Doping and Morphology Study. in 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC., 8547704, Institute of Electrical and Electronics Engineers Inc., pp. 2064-2069, 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018, Waikoloa Village, United States, 6/10/18. https://doi.org/10.1109/PVSC.2018.8547704

Saive R, Emmer H, Chen CT, Zhang C, Honsberg C, Atwater H. GaP/Si Heterojunction Solar Cells: An Interface, Doping and Morphology Study. In 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC. Institute of Electrical and Electronics Engineers Inc. 2018. p. 2064-2069. 8547704 https://doi.org/10.1109/PVSC.2018.8547704

Saive, Rebecca ; Emmer, Hal ; Chen, Christopher T. ; Zhang, Chaomin ; Honsberg, Christiana ; Atwater, Harry. / GaP/Si Heterojunction Solar Cells : An Interface, Doping and Morphology Study. 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC. Institute of Electrical and Electronics Engineers Inc., 2018. pp. 2064-2069

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