Bulk and interface characterization and modeling of copper indium aluminum gallium selenide (CIAGS) solar cells

Mandip J. Sibakoti; Sreejith Karthikeyan; Sehyun Hwang; Timothy Bontrager; Stephen A. Campbell

doi:10.1109/PVSC.2016.7750039

Bulk and interface characterization and modeling of copper indium aluminum gallium selenide (CIAGS) solar cells

Mandip J. Sibakoti
, Sreejith Karthikeyan
, Sehyun Hwang
, Timothy Bontrager
, Stephen A. Campbell

Electrical and Computer Engineering

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

1 Scopus citations

Abstract

The saturation of V_Oc at larger band gaps in Cu(In, Ga)Se₂ devices presents a major challenge in developing high efficiency solar devices for tandem solar applications. Although recent studies have shown that recombination at the buffer/absorber interface dominates in high Ga samples with wide band gaps, the interface parameters are not well understood to accurately model the device behavior. In this work we have applied temperature dependent CV and DLCP methods to estimate the interface state density along the bandgap in CIGS and CIAGS based solar devices. We have also used DLTS to study the nature of deep levels in CIGS and CIAGS devices. Based on our analysis and device simulation results, we attribute the VOC saturation in wide gap CIAGS devices to increased recombination rate at the interface.

Original language	English (US)
Title of host publication	2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2263-2268
Number of pages	6
ISBN (Electronic)	9781509027248
DOIs	https://doi.org/10.1109/PVSC.2016.7750039
State	Published - Nov 18 2016
Event	43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 - Portland, United States Duration: Jun 5 2016 → Jun 10 2016

Publication series

Name	Conference Record of the IEEE Photovoltaic Specialists Conference
Volume	2016-November
ISSN (Print)	0160-8371

Other

Other	43rd IEEE Photovoltaic Specialists Conference, PVSC 2016
Country/Territory	United States
City	Portland
Period	6/5/16 → 6/10/16

Bibliographical note

Publisher Copyright:
© 2016 IEEE.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

CIAGS
CIGS
DLCP
DLTS
Electrical Characterization
SCAPS modeling
Wide band-gap solar cells

Publisher link

10.1109/PVSC.2016.7750039

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Sibakoti, M. J., Karthikeyan, S., Hwang, S., Bontrager, T., & Campbell, S. A. (2016). Bulk and interface characterization and modeling of copper indium aluminum gallium selenide (CIAGS) solar cells. In 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016 (pp. 2263-2268). Article 7750039 (Conference Record of the IEEE Photovoltaic Specialists Conference; Vol. 2016-November). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2016.7750039

Bulk and interface characterization and modeling of copper indium aluminum gallium selenide (CIAGS) solar cells. / Sibakoti, Mandip J.; Karthikeyan, Sreejith; Hwang, Sehyun et al.
2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Institute of Electrical and Electronics Engineers Inc., 2016. p. 2263-2268 7750039 (Conference Record of the IEEE Photovoltaic Specialists Conference; Vol. 2016-November).

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

Sibakoti, MJ, Karthikeyan, S, Hwang, S, Bontrager, T & Campbell, SA 2016, Bulk and interface characterization and modeling of copper indium aluminum gallium selenide (CIAGS) solar cells. in 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016., 7750039, Conference Record of the IEEE Photovoltaic Specialists Conference, vol. 2016-November, Institute of Electrical and Electronics Engineers Inc., pp. 2263-2268, 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016, Portland, United States, 6/5/16. https://doi.org/10.1109/PVSC.2016.7750039

Sibakoti MJ, Karthikeyan S, Hwang S, Bontrager T, Campbell SA. Bulk and interface characterization and modeling of copper indium aluminum gallium selenide (CIAGS) solar cells. In 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Institute of Electrical and Electronics Engineers Inc. 2016. p. 2263-2268. 7750039. (Conference Record of the IEEE Photovoltaic Specialists Conference). doi: 10.1109/PVSC.2016.7750039

Sibakoti, Mandip J. ; Karthikeyan, Sreejith ; Hwang, Sehyun et al. / Bulk and interface characterization and modeling of copper indium aluminum gallium selenide (CIAGS) solar cells. 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Institute of Electrical and Electronics Engineers Inc., 2016. pp. 2263-2268 (Conference Record of the IEEE Photovoltaic Specialists Conference).

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abstract = "The saturation of VOc at larger band gaps in Cu(In, Ga)Se2 devices presents a major challenge in developing high efficiency solar devices for tandem solar applications. Although recent studies have shown that recombination at the buffer/absorber interface dominates in high Ga samples with wide band gaps, the interface parameters are not well understood to accurately model the device behavior. In this work we have applied temperature dependent CV and DLCP methods to estimate the interface state density along the bandgap in CIGS and CIAGS based solar devices. We have also used DLTS to study the nature of deep levels in CIGS and CIAGS devices. Based on our analysis and device simulation results, we attribute the VOC saturation in wide gap CIAGS devices to increased recombination rate at the interface.",

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author = "Sibakoti, \{Mandip J.\} and Sreejith Karthikeyan and Sehyun Hwang and Timothy Bontrager and Campbell, \{Stephen A.\}",

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AU - Bontrager, Timothy

AU - Campbell, Stephen A.

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N2 - The saturation of VOc at larger band gaps in Cu(In, Ga)Se2 devices presents a major challenge in developing high efficiency solar devices for tandem solar applications. Although recent studies have shown that recombination at the buffer/absorber interface dominates in high Ga samples with wide band gaps, the interface parameters are not well understood to accurately model the device behavior. In this work we have applied temperature dependent CV and DLCP methods to estimate the interface state density along the bandgap in CIGS and CIAGS based solar devices. We have also used DLTS to study the nature of deep levels in CIGS and CIAGS devices. Based on our analysis and device simulation results, we attribute the VOC saturation in wide gap CIAGS devices to increased recombination rate at the interface.

AB - The saturation of VOc at larger band gaps in Cu(In, Ga)Se2 devices presents a major challenge in developing high efficiency solar devices for tandem solar applications. Although recent studies have shown that recombination at the buffer/absorber interface dominates in high Ga samples with wide band gaps, the interface parameters are not well understood to accurately model the device behavior. In this work we have applied temperature dependent CV and DLCP methods to estimate the interface state density along the bandgap in CIGS and CIAGS based solar devices. We have also used DLTS to study the nature of deep levels in CIGS and CIAGS devices. Based on our analysis and device simulation results, we attribute the VOC saturation in wide gap CIAGS devices to increased recombination rate at the interface.

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Bulk and interface characterization and modeling of copper indium aluminum gallium selenide (CIAGS) solar cells

Abstract

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Bibliographical note

UN SDGs

Keywords

Publisher link

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