Synchrotron X-Ray Characterization of Alkali Elements at Grain Boundaries in Cu(In, Ga)Se2 Solar Cells

Harvey Guthrey; Mowafak Al-Jassim; Bradley West; Michael Stuckelberger; Lei Chen; Barry Lai; Jorg Maser; Volker Rose; James Dynes; William Shafarman; Mariana Bertoni

doi:10.1109/PVSC.2016.7749403

Synchrotron X-Ray Characterization of Alkali Elements at Grain Boundaries in Cu(In, Ga)Se2 Solar Cells

Harvey Guthrey, Mowafak Al-Jassim, Bradley West, Michael Stuckelberger, Lei Chen, Barry Lai, Jorg Maser, Volker Rose, James Dynes, William Shafarman, Mariana Bertoni

Materials Science

Research output: Contribution to conference › Paper › peer-review

4 Scopus Citations

Abstract

It is well known that the addition of alkali elements such as Na and K during and after growth of Cu(In, Ga)Se₂ (CIGS) has beneficial effects on the electronic properties of bulk material, improving device performance significantly. While the device level effects have been measured and reported, a direct observations of the localization of Na including its chemical nature are missing, and the impact of Na on elemental and phase segregation during CIGS growth is not fully understood. We investigate these aspects to shine light on the role of Na in CIGS solar cells with the ultimate goal of increasing their conversion efficiency. Utilizing a suite of synchrotron based x-ray characterization techniques, we discuss the challenges and advantages of these techniques for investigating segregation of main constituents of CIGS, Na distribution, chemical bonding of Na, and collection efficiency in CIGS as well as their correlations.

Original language	American English
Pages	31-34
Number of pages	4
DOIs	https://doi.org/10.1109/PVSC.2016.7749403 https://doi.org/10.1109/PVSC.2016.7749403
State	Published - 18 Nov 2016
Event	43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 - Portland, United States Duration: 5 Jun 2016 → 10 Jun 2016

Conference

Conference	43rd IEEE Photovoltaic Specialists Conference, PVSC 2016
Country/Territory	United States
City	Portland
Period	5/06/16 → 10/06/16

Bibliographical note

Publisher Copyright:
© 2016 IEEE.

NREL Publication Number

NREL/CP-5K00-67991

Keywords

alkali
CIGS
grain boundaries
Na
XRF

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Guthrey, H., Al-Jassim, M., West, B., Stuckelberger, M., Chen, L., Lai, B., Maser, J., Rose, V., Dynes, J., Shafarman, W., & Bertoni, M. (2016). Synchrotron X-Ray Characterization of Alkali Elements at Grain Boundaries in Cu(In, Ga)Se2 Solar Cells. 31-34. Paper presented at 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016, Portland, United States. https://doi.org/10.1109/PVSC.2016.7749403, https://doi.org/10.1109/PVSC.2016.7749403

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abstract = "It is well known that the addition of alkali elements such as Na and K during and after growth of Cu(In, Ga)Se2 (CIGS) has beneficial effects on the electronic properties of bulk material, improving device performance significantly. While the device level effects have been measured and reported, a direct observations of the localization of Na including its chemical nature are missing, and the impact of Na on elemental and phase segregation during CIGS growth is not fully understood. We investigate these aspects to shine light on the role of Na in CIGS solar cells with the ultimate goal of increasing their conversion efficiency. Utilizing a suite of synchrotron based x-ray characterization techniques, we discuss the challenges and advantages of these techniques for investigating segregation of main constituents of CIGS, Na distribution, chemical bonding of Na, and collection efficiency in CIGS as well as their correlations.",

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doi = "10.1109/PVSC.2016.7749403",

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Guthrey, H , Al-Jassim, M, West, B, Stuckelberger, M, Chen, L, Lai, B, Maser, J, Rose, V, Dynes, J, Shafarman, W & Bertoni, M 2016, 'Synchrotron X-Ray Characterization of Alkali Elements at Grain Boundaries in Cu(In, Ga)Se2 Solar Cells', Paper presented at 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016, Portland, United States, 5/06/16 - 10/06/16 pp. 31-34. https://doi.org/10.1109/PVSC.2016.7749403, https://doi.org/10.1109/PVSC.2016.7749403

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T1 - Synchrotron X-Ray Characterization of Alkali Elements at Grain Boundaries in Cu(In, Ga)Se2 Solar Cells

AU - Guthrey, Harvey

AU - Al-Jassim, Mowafak

AU - West, Bradley

AU - Stuckelberger, Michael

AU - Chen, Lei

AU - Lai, Barry

AU - Maser, Jorg

AU - Rose, Volker

AU - Dynes, James

AU - Shafarman, William

AU - Bertoni, Mariana

PY - 2016/11/18

Y1 - 2016/11/18

N2 - It is well known that the addition of alkali elements such as Na and K during and after growth of Cu(In, Ga)Se2 (CIGS) has beneficial effects on the electronic properties of bulk material, improving device performance significantly. While the device level effects have been measured and reported, a direct observations of the localization of Na including its chemical nature are missing, and the impact of Na on elemental and phase segregation during CIGS growth is not fully understood. We investigate these aspects to shine light on the role of Na in CIGS solar cells with the ultimate goal of increasing their conversion efficiency. Utilizing a suite of synchrotron based x-ray characterization techniques, we discuss the challenges and advantages of these techniques for investigating segregation of main constituents of CIGS, Na distribution, chemical bonding of Na, and collection efficiency in CIGS as well as their correlations.

AB - It is well known that the addition of alkali elements such as Na and K during and after growth of Cu(In, Ga)Se2 (CIGS) has beneficial effects on the electronic properties of bulk material, improving device performance significantly. While the device level effects have been measured and reported, a direct observations of the localization of Na including its chemical nature are missing, and the impact of Na on elemental and phase segregation during CIGS growth is not fully understood. We investigate these aspects to shine light on the role of Na in CIGS solar cells with the ultimate goal of increasing their conversion efficiency. Utilizing a suite of synchrotron based x-ray characterization techniques, we discuss the challenges and advantages of these techniques for investigating segregation of main constituents of CIGS, Na distribution, chemical bonding of Na, and collection efficiency in CIGS as well as their correlations.

KW - alkali

KW - CIGS

KW - grain boundaries

KW - Na

KW - XRF

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T2 - 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016

Y2 - 5 June 2016 through 10 June 2016

ER -

Synchrotron X-Ray Characterization of Alkali Elements at Grain Boundaries in Cu(In, Ga)Se2 Solar Cells

Abstract

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Keywords

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