作者: Jeffrey G. Tait , Tamara Merckx , Wenqi Li , Cindy Wong , Robert Gehlhaar
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摘要: 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 a priority industrialization of TFPV. In this work, generalized ve-step process presented fabricating high-performance from nonhalogenated inks. Resulting process, several new solvent systems are introduced based on thiophene, tetralin, 1,2,4-trimethylbenzene, o -xylene, anisole blade coating three different diketopyrrolopyrrole-based (pDPP5T-2, pPDPP5T-2S, P390) bulk heterojunctions applied in organic devices. Devices pDPP5T-2S P390 attain 5.6% 6.1% ciency, respectively, greater than ciency either material reached when processed system commonly used. These processes implemented without post-deposition annealing treatments or additives. The Hansen solubility parameters pDPP5T-2 obtained, used, along with wettability data variety substrates, to determine optimum combinations ratios deposition. This results pathways materials.