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Investigating the effect of heteroatom substitution in 2,1,3-benzoxadiazole and 2,1,3-benzothiadiazole compounds for organic photovoltaics

Investigating the effect of heteroatom substitution in 2,1,3-benzoxadiazole and 2,1,3-benzothiadiazole compounds for organic photovoltaics
Investigating the effect of heteroatom substitution in 2,1,3-benzoxadiazole and 2,1,3-benzothiadiazole compounds for organic photovoltaics

Two new donor-acceptor-donor molecules, featuring either 2,1,3-benzothiadiazole (BT) or 2,1,3-benzoxadiazole (BO) and capped by benzofuranyl-thienyl groups, are presented. The structures of these novel compounds differ only in the identity of one heteroatom in the acceptor unit. Replacement of the sulfur atom in BT with oxygen results in a marked improvement in the performance of PC61BM blends in bulk heterojunction organic photovoltaic (BHJ OPV) devices: a 10-fold increase in PCE is observed when switching to the BO analogue. This is partly due to a preferable morphology in the donor-fullerene blends formed upon spin-coating from chlorinated solvents.

2050-7534
3709-3714
Cameron, Joseph
569f2ded-aded-4c54-a045-556ad9b0cd81
Abed, Mahmoud Matar
7cd0d9d7-2eae-489c-8b1b-d3769cbf5c28
Chapman, Steven J.
94eccffa-46bd-4842-a747-9bce2b18f5c3
Findlay, Neil J.
6f6367a4-3b3c-4fb7-9ee7-3d53ad3dab8a
Skabara, Peter J.
7138e414-7d50-41c7-933e-0bccad2fa4cd
Horton, Peter N.
154c8930-bfc3-495b-ad4a-8a278d5da3a5
Coles, Simon J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Cameron, Joseph
569f2ded-aded-4c54-a045-556ad9b0cd81
Abed, Mahmoud Matar
7cd0d9d7-2eae-489c-8b1b-d3769cbf5c28
Chapman, Steven J.
94eccffa-46bd-4842-a747-9bce2b18f5c3
Findlay, Neil J.
6f6367a4-3b3c-4fb7-9ee7-3d53ad3dab8a
Skabara, Peter J.
7138e414-7d50-41c7-933e-0bccad2fa4cd
Horton, Peter N.
154c8930-bfc3-495b-ad4a-8a278d5da3a5
Coles, Simon J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8

Cameron, Joseph, Abed, Mahmoud Matar, Chapman, Steven J., Findlay, Neil J., Skabara, Peter J., Horton, Peter N. and Coles, Simon J. (2017) Investigating the effect of heteroatom substitution in 2,1,3-benzoxadiazole and 2,1,3-benzothiadiazole compounds for organic photovoltaics. Journal of Materials Chemistry C, 6 (14), 3709-3714. (doi:10.1039/c7tc05075e).

Record type: Article

Abstract

Two new donor-acceptor-donor molecules, featuring either 2,1,3-benzothiadiazole (BT) or 2,1,3-benzoxadiazole (BO) and capped by benzofuranyl-thienyl groups, are presented. The structures of these novel compounds differ only in the identity of one heteroatom in the acceptor unit. Replacement of the sulfur atom in BT with oxygen results in a marked improvement in the performance of PC61BM blends in bulk heterojunction organic photovoltaic (BHJ OPV) devices: a 10-fold increase in PCE is observed when switching to the BO analogue. This is partly due to a preferable morphology in the donor-fullerene blends formed upon spin-coating from chlorinated solvents.

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More information

Accepted/In Press date: 17 December 2017
e-pub ahead of print date: 21 December 2017

Identifiers

Local EPrints ID: 419630
URI: http://eprints.soton.ac.uk/id/eprint/419630
ISSN: 2050-7534
PURE UUID: 324fa8bc-4cb7-4cc3-a53f-e7b13cb718d9
ORCID for Peter N. Horton: ORCID iD orcid.org/0000-0001-8886-2016
ORCID for Simon J. Coles: ORCID iD orcid.org/0000-0001-8414-9272

Catalogue record

Date deposited: 17 Apr 2018 16:30
Last modified: 17 Dec 2019 01:54

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Contributors

Author: Joseph Cameron
Author: Mahmoud Matar Abed
Author: Steven J. Chapman
Author: Neil J. Findlay
Author: Peter J. Skabara
Author: Peter N. Horton ORCID iD
Author: Simon J. Coles ORCID iD

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