Decoding Charge Recombination through Charge Generation in Organic Solar Cells

Shoaee, Safa; Armin, Ardalan; Stolterfoht, Martin; Hosseini, Seyed Mehrdad; Kurpiers, Jona; Neher, Dieter

doi:10.1002/solr.201900184

Journal article 492 views 123 downloads

Decoding Charge Recombination through Charge Generation in Organic Solar Cells

Safa Shoaee

, Ardalan Armin

, Martin Stolterfoht, Seyed Mehrdad Hosseini, Jona Kurpiers, Dieter Neher

Solar RRL, Volume: 3, Issue: 11, Start page: 1900184

Swansea University Author: Ardalan Armin

PDF | Version of Record

© 2019 The Authors. This is an open access article under the terms of the Creative Commons Attribution License
Download (1.33MB)

Check full text

DOI (Published version): 10.1002/solr.201900184

Abstract

The in‐depth understanding of charge carrier photogeneration and recombination mechanisms in organic solar cells is still an ongoing effort. In donor:acceptor (bulk) heterojunction organic solar cells, charge photogeneration and recombination are inter‐related via the kinetics of charge transfer sta...

Full description

Published in:	Solar RRL
ISSN:	2367-198X 2367-198X
Published:	Wiley 2019
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa52737
Tags:	Add Tag No Tags, Be the first to tag this record!

first_indexed	2020-12-14T15:47:47Z
last_indexed	2023-01-11T14:30:01Z
id	cronfa52737
recordtype	SURis
fullrecord	<?xml version="1.0"?><rfc1807><datestamp>2022-12-05T11:58:24.8603495</datestamp><bib-version>v2</bib-version><id>52737</id><entry>2019-11-13</entry><title>Decoding Charge Recombination through Charge Generation in Organic Solar Cells</title><swanseaauthors><author><sid>22b270622d739d81e131bec7a819e2fd</sid><ORCID>0000-0002-6129-5354</ORCID><firstname>Ardalan</firstname><surname>Armin</surname><name>Ardalan Armin</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2019-11-13</date><deptcode>SPH</deptcode><abstract>The in‐depth understanding of charge carrier photogeneration and recombination mechanisms in organic solar cells is still an ongoing effort. In donor:acceptor (bulk) heterojunction organic solar cells, charge photogeneration and recombination are inter‐related via the kinetics of charge transfer states—being singlet or triplet states. Although high‐charge‐photogeneration quantum yields are achieved in many donor:acceptor systems, only very few systems show significantly reduced bimolecular recombination relative to the rate of free carrier encounters, in low‐mobility systems. This is a serious limitation for the industrialization of organic solar cells, in particular when aiming at thick active layers. Herein, a meta‐analysis of the device performance of numerous bulk heterojunction organic solar cells is presented for which field‐dependent photogeneration, charge carrier mobility, and fill factor are determined. Herein, a “spin‐related factor” that is dependent on the ratio of back electron transfer of the triplet charge transfer (CT) states to the decay rate of the singlet CT states is introduced. It is shown that this factor links the recombination reduction factor to charge‐generation efficiency. As a consequence, it is only in the systems with very efficient charge generation and very fast CT dissociation that free carrier recombination is strongly suppressed, regardless of the spin‐related factor.</abstract><type>Journal Article</type><journal>Solar RRL</journal><volume>3</volume><journalNumber>11</journalNumber><paginationStart>1900184</paginationStart><paginationEnd/><publisher>Wiley</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>2367-198X</issnPrint><issnElectronic>2367-198X</issnElectronic><keywords>charge generation; charge transfers; non-Langevin recombination; spin-related factors</keywords><publishedDay>13</publishedDay><publishedMonth>11</publishedMonth><publishedYear>2019</publishedYear><publishedDate>2019-11-13</publishedDate><doi>10.1002/solr.201900184</doi><url/><notes/><college>COLLEGE NANME</college><department>Physics</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>SPH</DepartmentCode><institution>Swansea University</institution><apcterm/><funders>Alexander von Humboldt Foundation European Regional Development Fund</funders><projectreference/><lastEdited>2022-12-05T11:58:24.8603495</lastEdited><Created>2019-11-13T16:44:07.8374963</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Physics</level></path><authors><author><firstname>Safa</firstname><surname>Shoaee</surname><orcid>0000-0001-5754-834x</orcid><order>1</order></author><author><firstname>Ardalan</firstname><surname>Armin</surname><orcid>0000-0002-6129-5354</orcid><order>2</order></author><author><firstname>Martin</firstname><surname>Stolterfoht</surname><order>3</order></author><author><firstname>Seyed Mehrdad</firstname><surname>Hosseini</surname><order>4</order></author><author><firstname>Jona</firstname><surname>Kurpiers</surname><order>5</order></author><author><firstname>Dieter</firstname><surname>Neher</surname><order>6</order></author></authors><documents><document><filename>52737__16460__4b0ed70492a94f8d8df1a70e5c8d599f.pdf</filename><originalFilename>Shoaee_et_al-2019-Solar_RRL.pdf</originalFilename><uploaded>2020-01-28T16:19:25.1734730</uploaded><type>Output</type><contentLength>1392509</contentLength><contentType>application/pdf</contentType><version>Version of Record</version><cronfaStatus>true</cronfaStatus><documentNotes>© 2019 The Authors. This is an open access article under the terms of the Creative Commons Attribution License</documentNotes><copyrightCorrect>true</copyrightCorrect><language>eng</language><licence>https://creativecommons.org/licenses/by/4.0/</licence></document></documents><OutputDurs/></rfc1807>
spelling	2022-12-05T11:58:24.8603495 v2 52737 2019-11-13 Decoding Charge Recombination through Charge Generation in Organic Solar Cells 22b270622d739d81e131bec7a819e2fd 0000-0002-6129-5354 Ardalan Armin Ardalan Armin true false 2019-11-13 SPH The in‐depth understanding of charge carrier photogeneration and recombination mechanisms in organic solar cells is still an ongoing effort. In donor:acceptor (bulk) heterojunction organic solar cells, charge photogeneration and recombination are inter‐related via the kinetics of charge transfer states—being singlet or triplet states. Although high‐charge‐photogeneration quantum yields are achieved in many donor:acceptor systems, only very few systems show significantly reduced bimolecular recombination relative to the rate of free carrier encounters, in low‐mobility systems. This is a serious limitation for the industrialization of organic solar cells, in particular when aiming at thick active layers. Herein, a meta‐analysis of the device performance of numerous bulk heterojunction organic solar cells is presented for which field‐dependent photogeneration, charge carrier mobility, and fill factor are determined. Herein, a “spin‐related factor” that is dependent on the ratio of back electron transfer of the triplet charge transfer (CT) states to the decay rate of the singlet CT states is introduced. It is shown that this factor links the recombination reduction factor to charge‐generation efficiency. As a consequence, it is only in the systems with very efficient charge generation and very fast CT dissociation that free carrier recombination is strongly suppressed, regardless of the spin‐related factor. Journal Article Solar RRL 3 11 1900184 Wiley 2367-198X 2367-198X charge generation; charge transfers; non-Langevin recombination; spin-related factors 13 11 2019 2019-11-13 10.1002/solr.201900184 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University Alexander von Humboldt Foundation European Regional Development Fund 2022-12-05T11:58:24.8603495 2019-11-13T16:44:07.8374963 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Safa Shoaee 0000-0001-5754-834x 1 Ardalan Armin 0000-0002-6129-5354 2 Martin Stolterfoht 3 Seyed Mehrdad Hosseini 4 Jona Kurpiers 5 Dieter Neher 6 52737__16460__4b0ed70492a94f8d8df1a70e5c8d599f.pdf Shoaee_et_al-2019-Solar_RRL.pdf 2020-01-28T16:19:25.1734730 Output 1392509 application/pdf Version of Record true © 2019 The Authors. This is an open access article under the terms of the Creative Commons Attribution License true eng https://creativecommons.org/licenses/by/4.0/
title	Decoding Charge Recombination through Charge Generation in Organic Solar Cells
spellingShingle	Decoding Charge Recombination through Charge Generation in Organic Solar Cells Ardalan Armin
title_short	Decoding Charge Recombination through Charge Generation in Organic Solar Cells
title_full	Decoding Charge Recombination through Charge Generation in Organic Solar Cells
title_fullStr	Decoding Charge Recombination through Charge Generation in Organic Solar Cells
title_full_unstemmed	Decoding Charge Recombination through Charge Generation in Organic Solar Cells
title_sort	Decoding Charge Recombination through Charge Generation in Organic Solar Cells
author_id_str_mv	22b270622d739d81e131bec7a819e2fd
author_id_fullname_str_mv	22b270622d739d81e131bec7a819e2fd_***_Ardalan Armin
author	Ardalan Armin
author2	Safa Shoaee Ardalan Armin Martin Stolterfoht Seyed Mehrdad Hosseini Jona Kurpiers Dieter Neher
format	Journal article
container_title	Solar RRL
container_volume	3
container_issue	11
container_start_page	1900184
publishDate	2019
institution	Swansea University
issn	2367-198X 2367-198X
doi_str_mv	10.1002/solr.201900184
publisher	Wiley
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	The in‐depth understanding of charge carrier photogeneration and recombination mechanisms in organic solar cells is still an ongoing effort. In donor:acceptor (bulk) heterojunction organic solar cells, charge photogeneration and recombination are inter‐related via the kinetics of charge transfer states—being singlet or triplet states. Although high‐charge‐photogeneration quantum yields are achieved in many donor:acceptor systems, only very few systems show significantly reduced bimolecular recombination relative to the rate of free carrier encounters, in low‐mobility systems. This is a serious limitation for the industrialization of organic solar cells, in particular when aiming at thick active layers. Herein, a meta‐analysis of the device performance of numerous bulk heterojunction organic solar cells is presented for which field‐dependent photogeneration, charge carrier mobility, and fill factor are determined. Herein, a “spin‐related factor” that is dependent on the ratio of back electron transfer of the triplet charge transfer (CT) states to the decay rate of the singlet CT states is introduced. It is shown that this factor links the recombination reduction factor to charge‐generation efficiency. As a consequence, it is only in the systems with very efficient charge generation and very fast CT dissociation that free carrier recombination is strongly suppressed, regardless of the spin‐related factor.
published_date	2019-11-13T04:05:17Z
_version_	1763753399357014016
score	11.013148

Decoding Charge Recombination through Charge Generation in Organic Solar Cells

Similar Items