Evaluation of hetero and back contact junctions of CZTSe: Ge bilayers solar cells with Modulus Spectroscopy

Sanghyun Lee; Kent J. Price; Edgardo Saucedo

doi:10.1109/PVSC43889.2021.9519064

Evaluation of hetero and back contact junctions of CZTSe: Ge bilayers solar cells with Modulus Spectroscopy

Sanghyun Lee
, Kent J. Price
, Edgardo Saucedo

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

1 Scopus citations

Abstract

We fabricated and analyzed CZTSe: Ge bi-layers solar cells to accurately evaluate the electrical structure at hetero and back contact junctions by modulus spectroscopy. Two separate built-in potentials of hetero and back contact junctions are extensively investigated to describe qualitative each junction model of CZTSe: Ge bilayers devices. Fabricated devices are analyzed with an equivalent circuit model, and LEVM/LEMW software resolved two different parallel circuit branch components. Modeling with LEVM/LEMW software accurately fits our model to modulus and impedance spectra in the given testing frequency domain. Using TCAD numerical simulations, we examine a variety of device models with a set of built-in potentials for appropriate parallel circuits with two capacitance and two resistance (R2=0.99). Our study shows that heterojunction built-in potential is 801 meV, which is 10 % smaller than a theoretical value, 894 meV. Conversely, the built-in potential of the back contact junction is 428 meV. Total built-in potential is 373 meV.

Original language	English
Title of host publication	2021 IEEE 48th Photovoltaic Specialists Conference, PVSC 2021
Pages	403-405
Number of pages	3
ISBN (Electronic)	9781665419222
DOIs	https://doi.org/10.1109/PVSC43889.2021.9519064
State	Published - Jun 20 2021
Event	48th IEEE Photovoltaic Specialists Conference, PVSC 2021 - Fort Lauderdale, United States Duration: Jun 20 2021 → Jun 25 2021

Publication series

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

Conference

Conference	48th IEEE Photovoltaic Specialists Conference, PVSC 2021
Country/Territory	United States
City	Fort Lauderdale
Period	6/20/21 → 6/25/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

Funding

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

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

Keywords

CZTSe
Ge
Modulus spectroscopy
built-in potential

ASJC Scopus subject areas

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

Access to Document

10.1109/PVSC43889.2021.9519064

Cite this

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title = "Evaluation of hetero and back contact junctions of CZTSe: Ge bilayers solar cells with Modulus Spectroscopy",

abstract = "We fabricated and analyzed CZTSe: Ge bi-layers solar cells to accurately evaluate the electrical structure at hetero and back contact junctions by modulus spectroscopy. Two separate built-in potentials of hetero and back contact junctions are extensively investigated to describe qualitative each junction model of CZTSe: Ge bilayers devices. Fabricated devices are analyzed with an equivalent circuit model, and LEVM/LEMW software resolved two different parallel circuit branch components. Modeling with LEVM/LEMW software accurately fits our model to modulus and impedance spectra in the given testing frequency domain. Using TCAD numerical simulations, we examine a variety of device models with a set of built-in potentials for appropriate parallel circuits with two capacitance and two resistance (R2=0.99). Our study shows that heterojunction built-in potential is 801 meV, which is 10 \% smaller than a theoretical value, 894 meV. Conversely, the built-in potential of the back contact junction is 428 meV. Total built-in potential is 373 meV.",

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Lee, S, Price, KJ & Saucedo, E 2021, Evaluation of hetero and back contact junctions of CZTSe: Ge bilayers solar cells with Modulus Spectroscopy. in 2021 IEEE 48th Photovoltaic Specialists Conference, PVSC 2021. Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 403-405, 48th IEEE Photovoltaic Specialists Conference, PVSC 2021, Fort Lauderdale, United States, 6/20/21. https://doi.org/10.1109/PVSC43889.2021.9519064

Evaluation of hetero and back contact junctions of CZTSe: Ge bilayers solar cells with Modulus Spectroscopy. / Lee, Sanghyun; Price, Kent J.; Saucedo, Edgardo.
2021 IEEE 48th Photovoltaic Specialists Conference, PVSC 2021. 2021. p. 403-405 (Conference Record of the IEEE Photovoltaic Specialists Conference).

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

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Evaluation of hetero and back contact junctions of CZTSe: Ge bilayers solar cells with Modulus Spectroscopy

Abstract

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Keywords

ASJC Scopus subject areas

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