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Morphological and micro-structural interface characterization in multilayer inverted polymer-fullerene bulk heterojunction solar cells

Jouane, A; Moubah, R; Schmerber, G; Larde, R; Odarchenko, Y; Ivanov, DA; Lassri, H; ... Jouane, Y; + view all (2018) Morphological and micro-structural interface characterization in multilayer inverted polymer-fullerene bulk heterojunction solar cells. Solar Energy Materials and Solar Cells , 180 pp. 258-265. 10.1016/j.solmat.2017.06.044. Green open access

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Abstract

Inverted polymer solar cells based on P3HT/PCBM bulk heterojunction were prepared on flexible polyethylene naphthalate (PEN) substrate. The effect of annealing of the PEN/ITO/ZnO multilayer and ZnO/P3HT:PCBM on the structural, morphological, photophysical and photovoltaic properties was investigated and scrutinized directly on the OPV devices using atom probe tomography (APT), scanning electron microscopy (SEM) and microfocus X-ray techniques. We carried out a 3D reconstruction of the interfaces of the multilayer containing PEN/ITO, ZnO/ITO and P3HT:PCBM/ZnO to address the interface micro-structure and its influence on the morphology of the photoactive film. The analyses show that the morphology of the interfaces is affected by the structure of each layer of the BHJ devices causing orientation of P3HT crystals with PCBM aggregates and ZnO, which in turn leads to a significant change of the charge transport across each layer and therefore photovoltaic performances.

Type: Article
Title: Morphological and micro-structural interface characterization in multilayer inverted polymer-fullerene bulk heterojunction solar cells
Location: Marrakech, MOROCCO
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.solmat.2017.06.044
Publisher version: http://doi.org/10.1016/j.solmat.2017.06.044
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Atom probe tomography, Organic/Inorganic heterostructures, Interface characterization, Flexible polymer-fullerene bulk heterojunction solar cells, Synchrotron micro-focus X-ray diffraction, Photoluminescence spectroscopy, Charge transfer
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery-pp.ucl.ac.uk/id/eprint/10060312
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