Determination of Solvent Systems for Blade Coating Thin Film Photovoltaics
Autor: | Paul Heremans, Tamara Merckx, Cindy Wong, Jeffrey G. Tait, Robert Gehlhaar, Mathieu Turbiez, David Cheyns, Wenqi Li |
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Rok vydání: | 2015 |
Předmět: |
Materials science
business.industry Energy conversion efficiency engineering.material Condensed Matter Physics Environmentally friendly Polymer solar cell Electronic Optical and Magnetic Materials Biomaterials Solvent Hildebrand solubility parameter Coating Chemical engineering Photovoltaics Electrochemistry engineering Organic chemistry Thin film business |
Zdroj: | Advanced Functional Materials. 25:3393-3398 |
ISSN: | 1616-301X |
Popis: | With lab-scale solution-processed thin fi lm photovoltaic (TFPV) devices attaining market relevant effi ciencies, the demand for environmentally friendly and scalable deposition techniques is increasing. Replacing toxic halogenated solvents is a priority for the industrialization of solution-processed TFPV. In this work, a generalized fi ve-step process is presented for fabricating high-performance devices from nonhalogenated inks. Resulting from this process, several new solvent systems are introduced based on thiophene, tetralin, 1,2,4-trimethylbenzene, o -xylene, and anisole for blade coating of three different diketopyrrolopyrrole-based (pDPP5T-2, pPDPP5T-2S, and P390) bulk heterojunctions applied in organic photovoltaic devices. Devices based on pDPP5T-2S and P390 attain 5.6% and 6.1% effi ciency, respectively, greater than the effi ciency either material reached when processed from the halogenated solvent system commonly used. These processes are implemented without post-deposition annealing treatments or additives. The Hansen solubility parameters of the pDPP5T-2 material are obtained, and are used, along with wettability data on a variety of substrates, to determine optimum solvent combinations and ratios for deposition. This generalized fi ve-step process results in new nonhalogenated solvent pathways for the scalable deposition of thin fi lm photovoltaic materials. |
Databáze: | OpenAIRE |
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