Journal
ADVANCED MATERIALS
Volume 22, Issue 37, Pages 4198-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201001446
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Funding
- EU [FP7-NMP-2007-212311]
- Marie Curie Est FuMaSSEC
- Networking Research Center on Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN)
- DGI (Spain) [CTQ2006-06333/BQU]
- Generalitat de Catalunya [2009SGR158]
- Bilateral project Poland-Spain [MAT2006-28191-E, HISZPANIA/140/2006]
- ICREA Funding Source: Custom
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Solution prepared single crystal organic field-effect transistors (OFETs) combine low-cost with high performance due to structural ordering of molecules. However, in organic crystals polymorphism is a known phenomenon, which can have a crucial influence on charge transport. Here, the performance of solution-prepared single crystal OFETs based on two different polymorphs of dithiophene-tetrathiafulvalene, which were investigated by confocal Raman spectroscopy and X-ray diffraction, are reported. OFET devices prepared using different configurations show that both polymorphs exhibited excellent device performance, although the a-phase revealed charge carrier mobility between two and ten times higher in accordance to the closer stacking of the molecules.
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