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Observable Hysteresis at Low Temperature in “Hysteresis Free” Organic–Inorganic Lead Halide Perovskite Solar Cells

D. Bryant, S. Wheeler, B.C. O'Regan, Trystan Watson Orcid Logo, P.R.F. Barnes, David Worsley Orcid Logo, J. Durrant

The Journal of Physical Chemistry Letters, Volume: 6, Issue: 16, Pages: 3190 - 3194

Swansea University Authors: Trystan Watson Orcid Logo, David Worsley Orcid Logo

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DOI (Published version): 10.1021/acs.jpclett.5b01381

Abstract

In this paper we address the JV hysteresis behavior of planar organic–inorganic lead halide perovskite solar cells fabricated using PC60BM as the cathode. At room temperature, these devices exhibit apparently hysteresis free JV scans. We observe that cooling the temperature to 175 K results in the a...

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Published in: The Journal of Physical Chemistry Letters
ISSN: 1948-7185
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa23340
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first_indexed 2015-09-18T02:08:50Z
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spelling 2020-12-14T08:42:10.5626870 v2 23340 2015-09-17 Observable Hysteresis at Low Temperature in “Hysteresis Free” Organic–Inorganic Lead Halide Perovskite Solar Cells a210327b52472cfe8df9b8108d661457 0000-0002-8015-1436 Trystan Watson Trystan Watson true false c426b1c1b0123d7057c1b969083cea69 0000-0002-9956-6228 David Worsley David Worsley true false 2015-09-17 MTLS In this paper we address the JV hysteresis behavior of planar organic–inorganic lead halide perovskite solar cells fabricated using PC60BM as the cathode. At room temperature, these devices exhibit apparently hysteresis free JV scans. We observe that cooling the temperature to 175 K results in the appearance of substantial JV hysteresis. Employing chronoamperometric measurements, we demonstrate that the half-time for the relaxation process underlying this hysteresis slows from 0.6 s at 298 K to 15.5 s at 175 K, yielding an activation energy of 0.12 eV. We further demonstrate that by cooling a cell to 77 K while held under positive bias, we are able to “freeze” the cell into the most favorable condition for efficient photovoltaic performance. We thus conclude that changes to device architecture that appear to remove room temperature JV hysteresis may not remove the underlying process(es), but rather shift them to time scales not readily observable in typical room temperature JV scans. Journal Article The Journal of Physical Chemistry Letters 6 16 3190 3194 1948-7185 20 8 2015 2015-08-20 10.1021/acs.jpclett.5b01381 http://www.scopus.com/inward/record.url?eid=2-s2.0-84939814531&amp;partnerID=MN8TOARS COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2020-12-14T08:42:10.5626870 2015-09-17T19:35:29.7570807 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering D. Bryant 1 S. Wheeler 2 B.C. O'Regan 3 Trystan Watson 0000-0002-8015-1436 4 P.R.F. Barnes 5 David Worsley 0000-0002-9956-6228 6 J. Durrant 7
title Observable Hysteresis at Low Temperature in “Hysteresis Free” Organic–Inorganic Lead Halide Perovskite Solar Cells
spellingShingle Observable Hysteresis at Low Temperature in “Hysteresis Free” Organic–Inorganic Lead Halide Perovskite Solar Cells
Trystan Watson
David Worsley
title_short Observable Hysteresis at Low Temperature in “Hysteresis Free” Organic–Inorganic Lead Halide Perovskite Solar Cells
title_full Observable Hysteresis at Low Temperature in “Hysteresis Free” Organic–Inorganic Lead Halide Perovskite Solar Cells
title_fullStr Observable Hysteresis at Low Temperature in “Hysteresis Free” Organic–Inorganic Lead Halide Perovskite Solar Cells
title_full_unstemmed Observable Hysteresis at Low Temperature in “Hysteresis Free” Organic–Inorganic Lead Halide Perovskite Solar Cells
title_sort Observable Hysteresis at Low Temperature in “Hysteresis Free” Organic–Inorganic Lead Halide Perovskite Solar Cells
author_id_str_mv a210327b52472cfe8df9b8108d661457
c426b1c1b0123d7057c1b969083cea69
author_id_fullname_str_mv a210327b52472cfe8df9b8108d661457_***_Trystan Watson
c426b1c1b0123d7057c1b969083cea69_***_David Worsley
author Trystan Watson
David Worsley
author2 D. Bryant
S. Wheeler
B.C. O'Regan
Trystan Watson
P.R.F. Barnes
David Worsley
J. Durrant
format Journal article
container_title The Journal of Physical Chemistry Letters
container_volume 6
container_issue 16
container_start_page 3190
publishDate 2015
institution Swansea University
issn 1948-7185
doi_str_mv 10.1021/acs.jpclett.5b01381
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 Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
url http://www.scopus.com/inward/record.url?eid=2-s2.0-84939814531&amp;partnerID=MN8TOARS
document_store_str 0
active_str 0
description In this paper we address the JV hysteresis behavior of planar organic–inorganic lead halide perovskite solar cells fabricated using PC60BM as the cathode. At room temperature, these devices exhibit apparently hysteresis free JV scans. We observe that cooling the temperature to 175 K results in the appearance of substantial JV hysteresis. Employing chronoamperometric measurements, we demonstrate that the half-time for the relaxation process underlying this hysteresis slows from 0.6 s at 298 K to 15.5 s at 175 K, yielding an activation energy of 0.12 eV. We further demonstrate that by cooling a cell to 77 K while held under positive bias, we are able to “freeze” the cell into the most favorable condition for efficient photovoltaic performance. We thus conclude that changes to device architecture that appear to remove room temperature JV hysteresis may not remove the underlying process(es), but rather shift them to time scales not readily observable in typical room temperature JV scans.
published_date 2015-08-20T03:27:32Z
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score 11.036553

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