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Highly efficient fullerene and non-fullerene based ternary organic solar cells incorporating a new tetrathiocin-cored semiconductor

Highly efficient fullerene and non-fullerene based ternary organic solar cells incorporating a new tetrathiocin-cored semiconductor
Highly efficient fullerene and non-fullerene based ternary organic solar cells incorporating a new tetrathiocin-cored semiconductor
A new dual-chain oligothiophene-based organic semiconductor, EH-5T-TTC, is presented. The molecule contains two conjugated chains linked by a fused tetrathiocin core. X-ray crystallography reveals a boat conformation within the 8-membered sulfur heterocycle core and extensive π-π and intermolecular sulfur-sulfur interactions in the bulk, leading to a 2-dimensional structure. This unusual molecule has been studied as a ternary component in organic solar cell blends containing the electron donor PTB7-Th and both fullerene (PC71BM) and non-fullerene acceptors ITIC and EH-IDTBR. By incorporating EH-5T-TTC as a ternary component, the power conversion efficiency of the binary blends containing non-fullerene acceptor increases by 17 % (from 7.8 % to 9.2 %) and by 85 % for the binary blend with fullerene acceptor (from 3.3 % to 6.3%). Detailed characterisation of the ternary blend systems implies that the ternary small molecule EH-5T-TTC functions differently in polymer:fullerene and polymer:non-fullerene blends and has dual functions of morphology modification and complementary spectral absorption.
Jagadamma, Lethy K.
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Taylor, Rupert G. D.
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Kanibolotsky, Alexander L.
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Sajjad, Muhammad Tariq
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Wright, Iain A.
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Horton, Peter N.
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Coles, Simon J.
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Samuel, Ifor D.W.
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Skabara, Peter J.
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Jagadamma, Lethy K.
4a356f50-b400-447b-8953-6d9c7ac1eaa3
Taylor, Rupert G. D.
c0ffb5af-6863-43af-8150-51a5bebb63bb
Kanibolotsky, Alexander L.
ce9e994f-9860-4cb6-be07-4e82b48c1fa8
Sajjad, Muhammad Tariq
4e4edd55-8d3c-472b-b0d9-8dd98a0a60d1
Wright, Iain A.
42bac22f-27b2-47cb-9e41-12fb75a92b6f
Horton, Peter N.
154c8930-bfc3-495b-ad4a-8a278d5da3a5
Coles, Simon J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Samuel, Ifor D.W.
7e17bee2-5c13-4933-91f6-55b420384502
Skabara, Peter J.
7138e414-7d50-41c7-933e-0bccad2fa4cd

Jagadamma, Lethy K., Taylor, Rupert G. D., Kanibolotsky, Alexander L., Sajjad, Muhammad Tariq, Wright, Iain A., Horton, Peter N., Coles, Simon J., Samuel, Ifor D.W. and Skabara, Peter J. (2019) Highly efficient fullerene and non-fullerene based ternary organic solar cells incorporating a new tetrathiocin-cored semiconductor. Sustainable Energy & Fuels. (doi:10.1039/C9SE00343F).

Record type: Article

Abstract

A new dual-chain oligothiophene-based organic semiconductor, EH-5T-TTC, is presented. The molecule contains two conjugated chains linked by a fused tetrathiocin core. X-ray crystallography reveals a boat conformation within the 8-membered sulfur heterocycle core and extensive π-π and intermolecular sulfur-sulfur interactions in the bulk, leading to a 2-dimensional structure. This unusual molecule has been studied as a ternary component in organic solar cell blends containing the electron donor PTB7-Th and both fullerene (PC71BM) and non-fullerene acceptors ITIC and EH-IDTBR. By incorporating EH-5T-TTC as a ternary component, the power conversion efficiency of the binary blends containing non-fullerene acceptor increases by 17 % (from 7.8 % to 9.2 %) and by 85 % for the binary blend with fullerene acceptor (from 3.3 % to 6.3%). Detailed characterisation of the ternary blend systems implies that the ternary small molecule EH-5T-TTC functions differently in polymer:fullerene and polymer:non-fullerene blends and has dual functions of morphology modification and complementary spectral absorption.

Text
TTC Ternary Blend revised_Final CLEAN - Accepted Manuscript
Restricted to Repository staff only until 18 June 2020.
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Accepted/In Press date: 3 June 2019
e-pub ahead of print date: 18 June 2019

Identifiers

Local EPrints ID: 432398
URI: https://eprints.soton.ac.uk/id/eprint/432398
PURE UUID: c67d8f24-049c-4565-b674-5f1646804ac4
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: 12 Jul 2019 16:30
Last modified: 20 Jul 2019 01:10

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Contributors

Author: Lethy K. Jagadamma
Author: Rupert G. D. Taylor
Author: Alexander L. Kanibolotsky
Author: Muhammad Tariq Sajjad
Author: Iain A. Wright
Author: Peter N. Horton ORCID iD
Author: Simon J. Coles ORCID iD
Author: Ifor D.W. Samuel
Author: Peter J. Skabara

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