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

Journal article


Jagadamma, LK, Taylor, RGD, Kanibolotsky, AL, Sajjad, T, Wright, IA, Horton, PN, Coles, SJ, Samuel, IDW 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. 3 (8), pp. 2087-2099.
AuthorsJagadamma, LK, Taylor, RGD, Kanibolotsky, AL, Sajjad, T, Wright, IA, Horton, PN, Coles, SJ, Samuel, IDW and Skabara, Peter J
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.

Year2019
JournalSustainable Energy & Fuels
Journal citation3 (8), pp. 2087-2099
PublisherRoyal Society of Chemistry
ISSN2398-4902
Digital Object Identifier (DOI)doi:10.1039/C9SE00343F
Publication dates
Print18 Jun 2019
Online18 Jun 2019
Publication process dates
Accepted03 Jun 2019
Deposited12 Feb 2020
Publisher's version
License
CC BY 4.0
File Access Level
Open
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https://openresearch.lsbu.ac.uk/item/88z76

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