期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 95, 期 1, 页码 15-20出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-009-5123-4
关键词
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资金
- German Science Foundation [Mu 334/28-1]
- Regione Emilia- Romagna PRIITT Nanofaber Net-Lab as well as the EU through the projects Marie Curie EST-SUPER [MEST-CT-2004-008128]
- RTN PRAIRIES [MRTN-CT-2006-035810]
- [ESF-SONS2-SUPRAMATES]
Micrometre-thick uniform layers of a polymeric semiconductor (poly(3-hexylthiophene), P3HT) have been fabricated from solution by spray deposition making use of a commercial airbrush. Multi-scale characterization by optical microscopy and atomic force microscopy revealed the formation of smooth layers featuring reproducible patterns of spatially correlated micron-sized holes. This morphology was found to be uniform over the whole sample surface, on millimetre scale. On this micro-patterned P3HT layer an orthogonal solvent (i.e. a solvent which does not dissolve the P3HT) has been employed to deposit either by spin coating or by drop casting a second organic semiconductor. While spin-coated films exhibited nano-crystals of an alkylated perylene tetracarboxy diimide (PDI) preferentially grown into the micro-fabricated holes, drop-cast films displayed crystalline PDI fibres adsorbed on the patterned surface in random positions.
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