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We have devised a novel dip coating procedure to form highly crystalline and macroscopic π-conjugated architectures on solid surfaces. We have employed this approach to a technologically relevant system, i.e. the electron-acceptor [6,6]-phenyl C61 butyric acid methyl ester molecule (PCBM), which is the most commonly used electron-acceptor in organic photovoltaics. Highly ordered, hexagonal shaped crystals of PCBM, ranging between 1 to 80 μm in diameter and from 20 to 500 nm in thickness, have been grown by dip coating the substrates into a solution containing the fullerene derivative. These crystals have been found to possess a monocrystalline character, to exhibit a hexagonal symmetry and to display micron sized molecularly flat terraces. The crystals have been prepared on a wide variety of surfaces such as SiOx, silanized SiOx, Au, graphite, amorphous carbon–copper grids and ITO. Their multiscale …
Royal Society of Chemistry
Publication date: 
1 Jan 2010

R Dabirian, X Feng, L Ortolani, A Liscio, V Morandi, Klaus Müllen, P Samori, V Palermo

Biblio References: 
Volume: 12 Issue: 17 Pages: 4473-4480
Physical Chemistry Chemical Physics