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Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques

Oskar J. Sandberg, Kristofer Tvingstedt, Paul Meredith, Ardalan Armin Orcid Logo

The Journal of Physical Chemistry C, Volume: 123, Issue: 23, Pages: 14261 - 14271

Swansea University Author: Ardalan Armin Orcid Logo

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DOI (Published version): 10.1021/acs.jpcc.9b03133

Abstract

Transient photovoltage (TPV) is a technique frequently used to determine charge carrier lifetimes in thin-film solar cells such as organic, dye sensitized and perovskite solar cells. As this lifetime is often incident light intensity dependent, its relevance to understanding the intrinsic properties...

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Published in: The Journal of Physical Chemistry C
ISSN: 1932-7447 1932-7455
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa50534
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first_indexed 2019-06-05T11:07:45Z
last_indexed 2019-06-24T14:55:11Z
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spelling 2019-06-24T10:46:35.4717149 v2 50534 2019-05-25 Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques 22b270622d739d81e131bec7a819e2fd 0000-0002-6129-5354 Ardalan Armin Ardalan Armin true false 2019-05-25 SPH Transient photovoltage (TPV) is a technique frequently used to determine charge carrier lifetimes in thin-film solar cells such as organic, dye sensitized and perovskite solar cells. As this lifetime is often incident light intensity dependent, its relevance to understanding the intrinsic properties of a photoactive material system as a material or device figure of merit has been questioned. To extract complete information on recombination dynamics, the TPV measurements are often performed in conjunction with charge extraction (CE) measurements, employed to determine the photo-generated charge carrier density and thereby the recombination rate constant and its order. In this communication, the underlying theory of TPV and CE is reviewed and expanded. Our theoretical findings are further solidified by numerical simulations and experiments on organic solar cells. We identify regimes of the open-circuit voltage within which accurate lifetimes and carrier densities can be determined with TPV and CE experiments. A wide range of steady-state light intensities is required in performing these experiments in order to identify their “working dynamic range” from which the recombination kinetics in thin-film solar cells can be determined. Journal Article The Journal of Physical Chemistry C 123 23 14261 14271 1932-7447 1932-7455 13 6 2019 2019-06-13 10.1021/acs.jpcc.9b03133 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2019-06-24T10:46:35.4717149 2019-05-25T17:39:36.1455021 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Oskar J. Sandberg 1 Kristofer Tvingstedt 2 Paul Meredith 3 Ardalan Armin 0000-0002-6129-5354 4 0050534-25052019174609.pdf Manuscriptsubmitted_REVISED.pdf 2019-05-25T17:46:09.1270000 Output 912419 application/pdf Accepted Manuscript true 2020-05-22T00:00:00.0000000 true eng 0050534-25052019174658.pdf Supporting_Informationv2.pdf 2019-05-25T17:46:58.1800000 Output 588228 application/pdf Accepted Manuscript true 2020-05-22T00:00:00.0000000 Supplementary material. true eng
title Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques
spellingShingle Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques
Ardalan Armin
title_short Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques
title_full Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques
title_fullStr Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques
title_full_unstemmed Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques
title_sort Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques
author_id_str_mv 22b270622d739d81e131bec7a819e2fd
author_id_fullname_str_mv 22b270622d739d81e131bec7a819e2fd_***_Ardalan Armin
author Ardalan Armin
author2 Oskar J. Sandberg
Kristofer Tvingstedt
Paul Meredith
Ardalan Armin
format Journal article
container_title The Journal of Physical Chemistry C
container_volume 123
container_issue 23
container_start_page 14261
publishDate 2019
institution Swansea University
issn 1932-7447
1932-7455
doi_str_mv 10.1021/acs.jpcc.9b03133
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 1
active_str 0
description Transient photovoltage (TPV) is a technique frequently used to determine charge carrier lifetimes in thin-film solar cells such as organic, dye sensitized and perovskite solar cells. As this lifetime is often incident light intensity dependent, its relevance to understanding the intrinsic properties of a photoactive material system as a material or device figure of merit has been questioned. To extract complete information on recombination dynamics, the TPV measurements are often performed in conjunction with charge extraction (CE) measurements, employed to determine the photo-generated charge carrier density and thereby the recombination rate constant and its order. In this communication, the underlying theory of TPV and CE is reviewed and expanded. Our theoretical findings are further solidified by numerical simulations and experiments on organic solar cells. We identify regimes of the open-circuit voltage within which accurate lifetimes and carrier densities can be determined with TPV and CE experiments. A wide range of steady-state light intensities is required in performing these experiments in order to identify their “working dynamic range” from which the recombination kinetics in thin-film solar cells can be determined.
published_date 2019-06-13T04:02:01Z
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score 10.998093

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