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Efficient ternary organic solar cells based on immiscible blends
Inst Super Tecn, Inst Telecomunicacoes, Av Rovisco Pais, P-1049001 Lisbon, Portugal..
Inst Super Tecn, Inst Telecomunicacoes, Av Rovisco Pais, P-1049001 Lisbon, Portugal..
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics.
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics.
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2017 (English)In: Organic electronics, ISSN 1566-1199, E-ISSN 1878-5530, Vol. 41, 130-136 p.Article in journal (Refereed) Published
Abstract [en]

Organic photovoltaic cells based on ternary blends of materials with complementary properties represent an approach to improve the photon-absorption and/or charge transport within the devices. However, the more complex nature of the ternary system, i.e. in diversity of materials' properties and morphological features, complicates the understanding of the processes behind such optimizations. Here, organic photovoltaic cells with wider absorption spectrum composed of two electron-donor polymers, F8T2, poly(9,9-dioctylfluorene-alt-bithiophene), and PTB7, poly([4,8-bis[(2'-ethylhexyl) oxy] benzo[1,2-b: 4,5-b'] dithiophene-2,6-diyl][3-fluoro-2-[(2'-ethylhexyl) carbonyl] thieno[3,4-b] thiophenediyl]), mixed with [6,6]-phenyl-C-61-butyric acid methyl ester (PC61BM) are investigated. We demonstrate an improvement of 25% in power conversion efficiency in comparison with the most efficient binary blend control devices. The active layers of these ternary cells exhibit gross phase separation, as determined by Atomic Force Microscopy (AFM) and Synchrotron-based Scanning Transmission X-ray Microscopy (STXM).

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 41, 130-136 p.
Keyword [en]
Polymer solar cells, Photovoltaics, Ternary blend, Morphology, High efficiency
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-62620DOI: 10.1016/j.orgel.2016.12.009ISI: 000390586300017OAI: oai:DiVA.org:kau-62620DiVA: diva2:1130697
Available from: 2017-08-10 Created: 2017-08-10 Last updated: 2017-08-10Bibliographically approved

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Hansson, RickardEricsson, Leif K. E.Moons, EllenMorgado, JorgeCharas, Ana
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