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Enhanced lifetime of organic photovoltaic diodes achieved by blending with PMMA : impact of morphology and donor:acceptor combination.

Nieto-Díaz, Balder A. and Pearson, Christopher and Al-Busaidi, Zakiya and Bowen, Leon and Petty, Michael C. and Groves, Christopher (2021) 'Enhanced lifetime of organic photovoltaic diodes achieved by blending with PMMA : impact of morphology and donor:acceptor combination.', Solar energy materials and solar cells., 219 . p. 110765.

Abstract

In order to realise the potential of organic photovoltaic devices (OPVs) to provide cheap, scalable access to renewable energy, it is necessary to improve their lifetime and cost of encapsulation. The aim of this work is to achieve these aims by blending the donor and acceptor with the commodity polymer, PMMA, to form a ternary blend device with enhanced lifetime. We find that ternary OPV devices prepared in this manner can have up to double the lifetime of the binary control devices to an extent that depends upon the PMMA morphology and the processing additives used. Further, we find that the initial performance of ternary OPVs may decrease (in the case of PTB7-based blends) or slightly increase (in the case of P3HT-based blends) when compared to their binary counterparts, which is hypothesised to be due to donor compatibility with the PMMA. These findings suggest that this approach can be employed in other OPV blend systems and give design rules to maximise the positive impact on device lifetime.

Item Type:Article
Full text:(AM) Accepted Manuscript
Available under License - Creative Commons Attribution Non-commercial No Derivatives.
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1016/j.solmat.2020.110765
Publisher statement:© 2020 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Date accepted:20 August 2020
Date deposited:01 September 2020
Date of first online publication:07 September 2020
Date first made open access:07 September 2021

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