Correlation between grain composition and charge carrier collection in Cu(In,Ga)Se2 solar cells

Bradley West; Sebastian Husein; Michael Stuckelberger; Barry Lai; Jorg Maser; Benjamin Stripe; Volker Rose; Harvey Guthrey; Mowafak Al-Jassim; Mariana Bertoni

doi:10.1109/PVSC.2015.7356154

Correlation between grain composition and charge carrier collection in Cu(In,Ga)Se2 solar cells

Bradley West, Sebastian Husein, Michael Stuckelberger, Barry Lai, Jorg Maser, Benjamin Stripe, Volker Rose, Harvey Guthrey, Mowafak Al-Jassim, Mariana Bertoni

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

11 Scopus citations

Abstract

Understanding the spatial composition inhomogeneity in CIGS solar cells can provide insight into a potentially large cause of decreased cell efficiency. We used synchrotron based nano x-ray fluorescence and nano x-ray beam induduced current to investigate the correlation between grain-to-grain compositional variations in Cu(In,Ga)Se2 absorber layers and variations in carrier collection efficiency. We found compositional variations as large as 5 at. % and current variations as large as 10%. Grains with higher average copper concentration and lower indium concentration showed increased carrier collection than neighboring grains with lower copper and higher indium concentration. We also investigated the overall composition dependence of carrier collection in CIGS films and show that 30% gallium content devices show a correlation between charge carrier collection, while 60% content devices do not.

Original language	English (US)
Title of host publication	2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Print)	9781479979448
DOIs	https://doi.org/10.1109/PVSC.2015.7356154
State	Published - Dec 14 2015
Event	42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States Duration: Jun 14 2015 → Jun 19 2015

Other

Other	42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
Country	United States
City	New Orleans
Period	6/14/15 → 6/19/15

Keywords

current measurement
microstructure
photovoltaic cells
synchrotron radiation
thin films

ASJC Scopus subject areas

Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials

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10.1109/PVSC.2015.7356154

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West, B., Husein, S., Stuckelberger, M., Lai, B., Maser, J., Stripe, B., Rose, V., Guthrey, H., Al-Jassim, M., & Bertoni, M. (2015). Correlation between grain composition and charge carrier collection in Cu(In,Ga)Se2 solar cells. In 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 [7356154] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2015.7356154

Correlation between grain composition and charge carrier collection in Cu(In,Ga)Se2 solar cells. / West, Bradley; Husein, Sebastian; Stuckelberger, Michael; Lai, Barry; Maser, Jorg; Stripe, Benjamin; Rose, Volker; Guthrey, Harvey; Al-Jassim, Mowafak; Bertoni, Mariana.

2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7356154.

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

West, B, Husein, S, Stuckelberger, M, Lai, B, Maser, J, Stripe, B, Rose, V, Guthrey, H, Al-Jassim, M & Bertoni, M 2015, Correlation between grain composition and charge carrier collection in Cu(In,Ga)Se2 solar cells. in 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015., 7356154, Institute of Electrical and Electronics Engineers Inc., 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015, New Orleans, United States, 6/14/15. https://doi.org/10.1109/PVSC.2015.7356154

West, Bradley ; Husein, Sebastian ; Stuckelberger, Michael ; Lai, Barry ; Maser, Jorg ; Stripe, Benjamin ; Rose, Volker ; Guthrey, Harvey ; Al-Jassim, Mowafak ; Bertoni, Mariana. / Correlation between grain composition and charge carrier collection in Cu(In,Ga)Se2 solar cells. 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 2015.

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abstract = "Understanding the spatial composition inhomogeneity in CIGS solar cells can provide insight into a potentially large cause of decreased cell efficiency. We used synchrotron based nano x-ray fluorescence and nano x-ray beam induduced current to investigate the correlation between grain-to-grain compositional variations in Cu(In,Ga)Se2 absorber layers and variations in carrier collection efficiency. We found compositional variations as large as 5 at. % and current variations as large as 10%. Grains with higher average copper concentration and lower indium concentration showed increased carrier collection than neighboring grains with lower copper and higher indium concentration. We also investigated the overall composition dependence of carrier collection in CIGS films and show that 30% gallium content devices show a correlation between charge carrier collection, while 60% content devices do not.",

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AU - Stripe, Benjamin

AU - Rose, Volker

AU - Guthrey, Harvey

AU - Al-Jassim, Mowafak

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N2 - Understanding the spatial composition inhomogeneity in CIGS solar cells can provide insight into a potentially large cause of decreased cell efficiency. We used synchrotron based nano x-ray fluorescence and nano x-ray beam induduced current to investigate the correlation between grain-to-grain compositional variations in Cu(In,Ga)Se2 absorber layers and variations in carrier collection efficiency. We found compositional variations as large as 5 at. % and current variations as large as 10%. Grains with higher average copper concentration and lower indium concentration showed increased carrier collection than neighboring grains with lower copper and higher indium concentration. We also investigated the overall composition dependence of carrier collection in CIGS films and show that 30% gallium content devices show a correlation between charge carrier collection, while 60% content devices do not.

AB - Understanding the spatial composition inhomogeneity in CIGS solar cells can provide insight into a potentially large cause of decreased cell efficiency. We used synchrotron based nano x-ray fluorescence and nano x-ray beam induduced current to investigate the correlation between grain-to-grain compositional variations in Cu(In,Ga)Se2 absorber layers and variations in carrier collection efficiency. We found compositional variations as large as 5 at. % and current variations as large as 10%. Grains with higher average copper concentration and lower indium concentration showed increased carrier collection than neighboring grains with lower copper and higher indium concentration. We also investigated the overall composition dependence of carrier collection in CIGS films and show that 30% gallium content devices show a correlation between charge carrier collection, while 60% content devices do not.

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KW - microstructure

KW - photovoltaic cells

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Correlation between grain composition and charge carrier collection in Cu(In,Ga)Se2 solar cells

Abstract

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Keywords

ASJC Scopus subject areas

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