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NeutronOPV

New neutron techniques to probe bulk heterojunction solar cells with graded morphologies – understanding the link between processing, nanostructure and device performance

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EC-Contrib. €

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Project "NeutronOPV" data sheet

The following table provides information about the project.

Coordinator
THE UNIVERSITY OF SHEFFIELD 

Organization address
address: FIRTH COURT WESTERN BANK
city: SHEFFIELD
postcode: S10 2TN
website: www.shef.ac.uk

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Project website http://www.gabrielbernardo.com/neutronopv.html
 Total cost 195˙454 €
 EC max contribution 195˙454 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2014
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2015
 Duration (year-month-day) from 2015-07-01   to  2017-06-30

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE UNIVERSITY OF SHEFFIELD UK (SHEFFIELD) coordinator 195˙454.00

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 Project objective

This project’s aim is to contribute to a better understanding of the relationship between processing conditions, active layer morphology and device performance in polymer solar cells (PSC), providing the understanding needed to guide the search for practical processing routes. The secondary aim is to develop new and more powerful characterisation techniques, to study PSCs, using neutrons in particular, and exploiting the potential of powerful and innovative new instruments at the neutron source ISIS, which is a partner on this proposal. These innovative new variants of neutron reflectivity, off-specular scattering and small angle scattering (SERGIS and SESANS), use spin-echo encoding to probe length-scales previously inaccessible by neutron techniques. This work will focus on some of the most recently introduced and highest-efficiency polymers, such as PBDTTT-EFT, PTB7 and PCDTBT, creating thin films for devices both by the laboratory-based spin-coating method and also the industrially-scalable method of spray-coating. The methodology to be used will consist in processing the active layers from mixed solvents with step graded variations in composition, with the main purpose of generating a series of devices with graded variations in morphology. The as-produced active layers will be systematically investigated and compared in terms of morphology, charge mobility and photovoltaic performance; the neutron techniques available at the ISIS Neutron Spallation Source (Didcot, UK) will be complemented with a large suite of conventional laboratory-based techniques available at Sheffield University, and by x-ray scattering, both laboratory based and at synchrotron sources. This mixed solvent approach will be also valuable for scale up, especially by removing the need for halogenated solvents.

 Publications

year authors and title journal last update
List of publications.
2017 Yiwei Zhang, Andrew J. Parnell, Fabio Pontecchiani, Joshaniel F. K. Cooper, Richard L. Thompson, Richard A. L. Jones, Stephen M. King, David G. Lidzey, Gabriel Bernardo
Understanding and controlling morphology evolution via DIO plasticization in PffBT4T-2OD/PC71BM devices
published pages: 44269, ISSN: 2045-2322, DOI: 10.1038/srep44269
Scientific Reports 7 2019-07-24

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