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Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor

Ravichandran Shivanna, Safa Shoaee, Stoichko Dimitrov Orcid Logo, Sunil Kumar Kandappa, Sridhar Rajaram, James Durrant Orcid Logo, K. S. Narayan

Energy & Environmental Science, Volume: 7, Issue: 1, Pages: 435 - 441

Swansea University Authors: Stoichko Dimitrov Orcid Logo, James Durrant Orcid Logo

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DOI (Published version): 10.1039/c3ee42484g

Abstract

The origin of high current density in efficient non-fullerene based bulk heterojunction (BHJ) organic solar cells employing a non-planar perylene dimer (TP) as an electron acceptor and a thiophene based donor polymer PBDTTT-CT is investigated using electrical and optical techniques. Photoluminescenc...

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Published in: Energy & Environmental Science
ISSN: 1754-5692 1754-5706
Published: 2014
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URI: https://cronfa.swan.ac.uk/Record/cronfa31798
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spelling 2020-07-01T16:18:49.8701159 v2 31798 2017-01-27 Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor 9fc26ec1b8655cd0d66f7196a924fe14 0000-0002-1564-7080 Stoichko Dimitrov Stoichko Dimitrov true false f3dd64bc260e5c07adfa916c27dbd58a 0000-0001-8353-7345 James Durrant James Durrant true false 2017-01-27 EEN The origin of high current density in efficient non-fullerene based bulk heterojunction (BHJ) organic solar cells employing a non-planar perylene dimer (TP) as an electron acceptor and a thiophene based donor polymer PBDTTT-CT is investigated using electrical and optical techniques. Photoluminescence measurements reveal almost complete quenching of both the donor and acceptor excitons, indicating efficient electron and hole transfer processes. The nanomorphology of the films shows fine mixing of the donor polymer and TP at 50 : 50% weight ratio with a photon to current conversion efficiency (IPCE) of 45% in the visible regime. At the donor–acceptor interface, both polymer and TP excitons undergo fast dissociation with similar time scales of a few picoseconds. The magnitude of the polaron yield of PBDTTT-CT:TP blends is observed to be comparable to that of PBDTTT-CT:PC70BM blends and exhibits similar μs-decay dynamics. A power conversion efficiency of 3.2% is achieved for devices with 50 : 50% by weight compositional ratio of polymer and TP. Journal Article Energy & Environmental Science 7 1 435 441 1754-5692 1754-5706 31 12 2014 2014-12-31 10.1039/c3ee42484g http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&amp;SrcAuth=ORCID&amp;SrcApp=OrcidOrg&amp;DestLinkType=FullRecord&amp;DestApp=WOS_CPL&amp;KeyUT=WOS:000329550700034&amp;KeyUID=WOS:000329550700034 The author made a substantial contribution to the organisation of the conduct of the study; to carrying out the study (including acquisition of study data); to analysis and interpretation of study data. The author helped draft the output. COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2020-07-01T16:18:49.8701159 2017-01-27T13:46:02.3920477 College of Engineering Engineering Ravichandran Shivanna 1 Safa Shoaee 2 Stoichko Dimitrov 0000-0002-1564-7080 3 Sunil Kumar Kandappa 4 Sridhar Rajaram 5 James Durrant 0000-0001-8353-7345 6 K. S. Narayan 7
title Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor
spellingShingle Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor
Stoichko Dimitrov
James Durrant
title_short Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor
title_full Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor
title_fullStr Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor
title_full_unstemmed Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor
title_sort Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor
author_id_str_mv 9fc26ec1b8655cd0d66f7196a924fe14
f3dd64bc260e5c07adfa916c27dbd58a
author_id_fullname_str_mv 9fc26ec1b8655cd0d66f7196a924fe14_***_Stoichko Dimitrov
f3dd64bc260e5c07adfa916c27dbd58a_***_James Durrant
author Stoichko Dimitrov
James Durrant
author2 Ravichandran Shivanna
Safa Shoaee
Stoichko Dimitrov
Sunil Kumar Kandappa
Sridhar Rajaram
James Durrant
K. S. Narayan
format Journal article
container_title Energy & Environmental Science
container_volume 7
container_issue 1
container_start_page 435
publishDate 2014
institution Swansea University
issn 1754-5692
1754-5706
doi_str_mv 10.1039/c3ee42484g
college_str College of Engineering
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hierarchy_top_id collegeofengineering
hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
url http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&amp;SrcAuth=ORCID&amp;SrcApp=OrcidOrg&amp;DestLinkType=FullRecord&amp;DestApp=WOS_CPL&amp;KeyUT=WOS:000329550700034&amp;KeyUID=WOS:000329550700034
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description The origin of high current density in efficient non-fullerene based bulk heterojunction (BHJ) organic solar cells employing a non-planar perylene dimer (TP) as an electron acceptor and a thiophene based donor polymer PBDTTT-CT is investigated using electrical and optical techniques. Photoluminescence measurements reveal almost complete quenching of both the donor and acceptor excitons, indicating efficient electron and hole transfer processes. The nanomorphology of the films shows fine mixing of the donor polymer and TP at 50 : 50% weight ratio with a photon to current conversion efficiency (IPCE) of 45% in the visible regime. At the donor–acceptor interface, both polymer and TP excitons undergo fast dissociation with similar time scales of a few picoseconds. The magnitude of the polaron yield of PBDTTT-CT:TP blends is observed to be comparable to that of PBDTTT-CT:PC70BM blends and exhibits similar μs-decay dynamics. A power conversion efficiency of 3.2% is achieved for devices with 50 : 50% by weight compositional ratio of polymer and TP.
published_date 2014-12-31T03:54:49Z
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