Electrical and Compositional Characterization of Gallium Grading in Cu(In,Ga)Se2 Solar Cells

Bradley West; Harvey Guthrey; Lei Chen; April Jeffries; Simone Bernardini; Barry Lai; Jörg Maser; William Shafarman; Mowafak Al-Jasim; Mariana Bertoni

doi:10.1109/PVSC.2014.6925254

Electrical and Compositional Characterization of Gallium Grading in Cu(In,Ga)Se2 Solar Cells

Bradley West, Harvey Guthrey, Lei Chen, April Jeffries, Simone Bernardini, Barry Lai, Jörg Maser, William Shafarman, Mowafak Al-Jasim, Mariana Bertoni

Materials Science

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

2 Scopus Citations

Abstract

Cu(In,Ga)Se₂ (CIGS) solar cells were characterized in cross section using electron beam induced current (EBIC) and synchrotron based x-ray fluorescence (XRF) measurements. Samples with varying gallium ratios and growth methods were compared. A correlation was observed between the compositional gallium grading profile from XRF and carrier activity seen in EBIC through the thickness of the CIGS layer. Samples with steep back grading showed carrier activity isolated near the CIGS/CdS interface, whereas a more uniform grading resulted in carrier activity seen throughout the absorber layer. 'Notch' grading showed only slight variation in EBIC profile compared to a back graded sample with similar gallium ratios.

Original language	American English
Pages	1726-1728
Number of pages	3
DOIs	https://doi.org/10.1109/PVSC.2014.6925254 https://doi.org/10.1109/PVSC.2014.6925254
State	Published - 15 Oct 2014
Event	40th IEEE Photovoltaic Specialist Conference, PVSC 2014 - Denver, United States Duration: 8 Jun 2014 → 13 Jun 2014

Conference

Conference	40th IEEE Photovoltaic Specialist Conference, PVSC 2014
Country/Territory	United States
City	Denver
Period	8/06/14 → 13/06/14

Bibliographical note

Publisher Copyright:
© 2014 IEEE.

NREL Publication Number

NREL/CP-5K00-63760

Keywords

band gap grading
chalcopyrite
CIGS
EBIC
synchrotron
thin film
x-ray fluorescence

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West, B., Guthrey, H., Chen, L., Jeffries, A., Bernardini, S., Lai, B., Maser, J., Shafarman, W., Al-Jasim, M., & Bertoni, M. (2014). Electrical and Compositional Characterization of Gallium Grading in Cu(In,Ga)Se2 Solar Cells. 1726-1728. Paper presented at 40th IEEE Photovoltaic Specialist Conference, PVSC 2014, Denver, United States. https://doi.org/10.1109/PVSC.2014.6925254, https://doi.org/10.1109/PVSC.2014.6925254

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abstract = "Cu(In,Ga)Se2 (CIGS) solar cells were characterized in cross section using electron beam induced current (EBIC) and synchrotron based x-ray fluorescence (XRF) measurements. Samples with varying gallium ratios and growth methods were compared. A correlation was observed between the compositional gallium grading profile from XRF and carrier activity seen in EBIC through the thickness of the CIGS layer. Samples with steep back grading showed carrier activity isolated near the CIGS/CdS interface, whereas a more uniform grading resulted in carrier activity seen throughout the absorber layer. 'Notch' grading showed only slight variation in EBIC profile compared to a back graded sample with similar gallium ratios.",

keywords = "band gap grading, chalcopyrite, CIGS, EBIC, synchrotron, thin film, x-ray fluorescence",

author = "Bradley West and Harvey Guthrey and Lei Chen and April Jeffries and Simone Bernardini and Barry Lai and J{\"o}rg Maser and William Shafarman and Mowafak Al-Jasim and Mariana Bertoni",

note = "Publisher Copyright: {\textcopyright} 2014 IEEE.; 40th IEEE Photovoltaic Specialist Conference, PVSC 2014 ; Conference date: 08-06-2014 Through 13-06-2014",

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doi = "10.1109/PVSC.2014.6925254",

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West, B, Guthrey, H, Chen, L, Jeffries, A, Bernardini, S, Lai, B, Maser, J, Shafarman, W, Al-Jasim, M & Bertoni, M 2014, 'Electrical and Compositional Characterization of Gallium Grading in Cu(In,Ga)Se2 Solar Cells', Paper presented at 40th IEEE Photovoltaic Specialist Conference, PVSC 2014, Denver, United States, 8/06/14 - 13/06/14 pp. 1726-1728. https://doi.org/10.1109/PVSC.2014.6925254, https://doi.org/10.1109/PVSC.2014.6925254

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T1 - Electrical and Compositional Characterization of Gallium Grading in Cu(In,Ga)Se2 Solar Cells

AU - West, Bradley

AU - Guthrey, Harvey

AU - Chen, Lei

AU - Jeffries, April

AU - Bernardini, Simone

AU - Lai, Barry

AU - Maser, Jörg

AU - Shafarman, William

AU - Al-Jasim, Mowafak

AU - Bertoni, Mariana

PY - 2014/10/15

Y1 - 2014/10/15

N2 - Cu(In,Ga)Se2 (CIGS) solar cells were characterized in cross section using electron beam induced current (EBIC) and synchrotron based x-ray fluorescence (XRF) measurements. Samples with varying gallium ratios and growth methods were compared. A correlation was observed between the compositional gallium grading profile from XRF and carrier activity seen in EBIC through the thickness of the CIGS layer. Samples with steep back grading showed carrier activity isolated near the CIGS/CdS interface, whereas a more uniform grading resulted in carrier activity seen throughout the absorber layer. 'Notch' grading showed only slight variation in EBIC profile compared to a back graded sample with similar gallium ratios.

AB - Cu(In,Ga)Se2 (CIGS) solar cells were characterized in cross section using electron beam induced current (EBIC) and synchrotron based x-ray fluorescence (XRF) measurements. Samples with varying gallium ratios and growth methods were compared. A correlation was observed between the compositional gallium grading profile from XRF and carrier activity seen in EBIC through the thickness of the CIGS layer. Samples with steep back grading showed carrier activity isolated near the CIGS/CdS interface, whereas a more uniform grading resulted in carrier activity seen throughout the absorber layer. 'Notch' grading showed only slight variation in EBIC profile compared to a back graded sample with similar gallium ratios.

KW - band gap grading

KW - chalcopyrite

KW - CIGS

KW - EBIC

KW - synchrotron

KW - thin film

KW - x-ray fluorescence

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U2 - 10.1109/PVSC.2014.6925254

DO - 10.1109/PVSC.2014.6925254

M3 - Paper

AN - SCOPUS:84912076782

SP - 1726

EP - 1728

T2 - 40th IEEE Photovoltaic Specialist Conference, PVSC 2014

Y2 - 8 June 2014 through 13 June 2014

ER -

Electrical and Compositional Characterization of Gallium Grading in Cu(In,Ga)Se2 Solar Cells

Abstract

Conference

Bibliographical note

NREL Publication Number

Keywords

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