Environmentally friendly preparation of nanoparticles for organic photovoltaics

Xun Pan, Anirudh Sharma, Desta Gedefaw, Renee Kroon, Amaia Diaz De Zerio, Natalie P. Holmes, A.L. David Kilcoyne, Matthew G Barr, Adam Fahy, Melissa Marks, Xiaojing Zhou, Warwick Belcher, Paul C Dastoor, Mats R. Andersson

    Research output: Contribution to journalArticlepeer-review

    24 Citations (Scopus)


    Aqueous nanoparticle dispersions were prepared from a conjugated polymer poly[thiophene-2,5-diyl-alt-5,10-bis((2-hexyldecyl)oxy)dithieno[3,2-c:3′,2′-h][1,5]naphthyridine-2,7-diyl] (PTNT) and fullerene blend utilizing chloroform as well as a non-chlorinated and environmentally benign solvent, o-xylene, as the miniemulsion dispersed phase solvent. The nanoparticles (NPs) in the solid-state film were found to coalesce and offered a smooth surface topography upon thermal annealing. Organic photovoltaics (OPVs) with photoactive layer processed from the nanoparticle dispersions prepared using chloroform as the miniemulsion dispersed phase solvent were found to have a power conversion efficiency (PCE) of 1.04%, which increased to 1.65% for devices utilizing NPs prepared from o-xylene. Physical, thermal and optical properties of NPs prepared using both chloroform and o-xylene were systematically studied using dynamic mechanical thermal analysis (DMTA) and photoluminescence (PL) spectroscopy and correlated to their photovoltaic properties. The PL results indicate different morphology of NPs in the solid state were achieved by varying miniemulsion dispersed phase solvent.

    Original languageEnglish
    Pages (from-to)432-440
    Number of pages9
    Publication statusPublished - Aug 2018


    • nanoparticles
    • organic photovoltaics
    • green solvent
    • environmentally-friendly processing
    • Nanoparticles
    • Organic photovoltaics
    • Environmentally friendly processing
    • Green solvent


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