Interface models of CZTSe: Ge bilayers solar cells with Impedance Spectroscopy

Sanghyun Lee; Kent J. Price; Edgardo Saucedo

doi:10.1109/PVSC45281.2020.9300607

Interface models of CZTSe: Ge bilayers solar cells with Impedance Spectroscopy

Sanghyun Lee, Kent J. Price, Edgardo Saucedo

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

2 Scopus citations

Abstract

We introduce a spectral response of impedance of CZTSe nanoscale Ge bi-layers solar cells with an improved equivalent circuit model. Improved AC circuit models are applied, considering a realistic device structure with lumped bulk resistance, resistance, and capacitance of one heterojunction interface, and two effective back-contact interfaces. The impedance model is characterized by series/parallel resistance, and constant phase element to accurately analyze the device structure, which shows a good agreement of the fitting to data (\chi^{2}=4.19\ \times\ 10^{-4}). Two indicative parameters of back-contact interfaces are close to 1, implying the improved back-contact interface by adding nanolayer Ge (2.5 nm) between CZTSe and MoSe2. Resistances of both back-contact interfaces are less than 0.3% of the CdS/CZTSe heterojunction interfaces.

Original language	English
Title of host publication	2020 47th IEEE Photovoltaic Specialists Conference, PVSC 2020
Pages	2519-2521
Number of pages	3
ISBN (Electronic)	9781728161150
DOIs	https://doi.org/10.1109/PVSC45281.2020.9300607
State	Published - Jun 14 2020
Event	47th IEEE Photovoltaic Specialists Conference, PVSC 2020 - Calgary, Canada Duration: Jun 15 2020 → Aug 21 2020

Publication series

Name	Conference Record of the IEEE Photovoltaic Specialists Conference
Volume	2020-June
ISSN (Print)	0160-8371

Conference

Conference	47th IEEE Photovoltaic Specialists Conference, PVSC 2020
Country/Territory	Canada
City	Calgary
Period	6/15/20 → 8/21/20

Bibliographical note

Publisher Copyright:
© 2020 IEEE.

Funding

Authors acknowledges the generous support by the Duke Energy Foundation and CSRC at Indiana State University.

Funders	Funder number
Indiana State University
Duke Energy Foundation
Colorado Society for Respiratory Care

Keywords

CZTSe
Ge
Impedance
kesterite
modeling

ASJC Scopus subject areas

Control and Systems Engineering
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

Access to Document

10.1109/PVSC45281.2020.9300607

Cite this

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title = "Interface models of CZTSe: Ge bilayers solar cells with Impedance Spectroscopy",

abstract = "We introduce a spectral response of impedance of CZTSe nanoscale Ge bi-layers solar cells with an improved equivalent circuit model. Improved AC circuit models are applied, considering a realistic device structure with lumped bulk resistance, resistance, and capacitance of one heterojunction interface, and two effective back-contact interfaces. The impedance model is characterized by series/parallel resistance, and constant phase element to accurately analyze the device structure, which shows a good agreement of the fitting to data (\chi^{2}=4.19\ \times\ 10^{-4}). Two indicative parameters of back-contact interfaces are close to 1, implying the improved back-contact interface by adding nanolayer Ge (2.5 nm) between CZTSe and MoSe2. Resistances of both back-contact interfaces are less than 0.3% of the CdS/CZTSe heterojunction interfaces.",

keywords = "CZTSe, Ge, Impedance, kesterite, modeling",

author = "Sanghyun Lee and Price, {Kent J.} and Edgardo Saucedo",

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doi = "10.1109/PVSC45281.2020.9300607",

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Lee, S, Price, KJ & Saucedo, E 2020, Interface models of CZTSe: Ge bilayers solar cells with Impedance Spectroscopy. in 2020 47th IEEE Photovoltaic Specialists Conference, PVSC 2020., 9300607, Conference Record of the IEEE Photovoltaic Specialists Conference, vol. 2020-June, pp. 2519-2521, 47th IEEE Photovoltaic Specialists Conference, PVSC 2020, Calgary, Canada, 6/15/20. https://doi.org/10.1109/PVSC45281.2020.9300607

Interface models of CZTSe: Ge bilayers solar cells with Impedance Spectroscopy. / Lee, Sanghyun; Price, Kent J.; Saucedo, Edgardo.
2020 47th IEEE Photovoltaic Specialists Conference, PVSC 2020. 2020. p. 2519-2521 9300607 (Conference Record of the IEEE Photovoltaic Specialists Conference; Vol. 2020-June).

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

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Interface models of CZTSe: Ge bilayers solar cells with Impedance Spectroscopy

Abstract

Publication series

Conference

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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