Nano-pathways: Bridging the divide between water-processable nanoparticulate and bulk heterojunction organic photovoltaics

Highlights
• NPs enable fabrication of OPVs from environmentally friendly water-based inks.
• TQ1:PC71BM NPs show a superior level of morphological control in thin films.
• Bicontinuous percolation pathways throughout thin films can be achieved with NPs.
• Carefully annealing the high Tg material domains facilitates nano-pathway formation.
• PC71BM nano-pathways bridge the divide between dispersed PC71BM-rich NP cores.