@phdthesis{Schmidt2008,
  author    = {Schmidt, R{\"u}diger},
  title     = {Perylene Bisimide and Acene Derivatives as Organic Semiconductors in OTFTs},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-29314},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2008},
  abstract  = {This thesis deals with the synthesis of improved organic semiconductors, the detailed investigation of the molecular properties and the solid state arrangements revealed by single crystal X-ray diffraction and finally the development of structureperformance dependencies by measuring of the charge carrier mobilities of the derivatives in thin film transistors. The two main-goals of this thesis were achieved. Well soluble acene derivatives for spin-coated TFTs were obtained, showing charge carrier mobilities in the range of polymer p-type materials. Novel core-fluorinated perylene bisimide dyes were synthesized particularly and the use of electron deficient substituents lead to PBIs with outstanding air-stable mobilities in thin film transistors prepared by vacuum deposition techniques. The relationship between performance, air stability and solid state packing was elucidated in detail by single crystal X-ray diffraction analysis.},
  subject      = {D{\"u}nnschichttransistor},
  language  = {en}
}
@phdthesis{Leufgen2009,
  author    = {Leufgen, Michael},
  title     = {Effects of structure, sub-micrometer scaling, and environmental conditions on pi-conjugated organic semiconductors in OFET devices},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-52801},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2009},
  abstract  = {The thesis investigates the electrical transport properties of different π-conjugated organic semiconductors applied as active semiconducting material in organic field-effect transistor (OFET) devices. Theses organic materials are αω-dihexylquaterthiophene (DH4T), the tetrathiafulvalene (TTF) derivatives dibenzene-tetrathiafulvalene (DB-TTF) and dithiophene-tetrathiafulvalene (DT-TTF), and polytriarylamine (PTAA). The latter material is an amorphous polymer, the three others are small molecule oligomer materials. Different deposition methods were applied and compared. The investigations in the thesis treat the pure characterisation of the above materials with their different properties in OFET devices. Furthermore, the aim was to observe and analyse general rules and effects in OFETs depending on the structure, previous history, and the device scaling. Therefore, different tools and special analysing methods were developed and applied. These are a standard characterisation method for the classification of the used organic semiconductor, temperature dependent electrical characterisation investigating the electrical transport properties, the newly developed in situ measurement method of OFET devices, the downscaling of the OFET devices of channel length below 100 nm, and the lithographical structuring of a PTAA film.},
  subject      = {Organischer Halbleiter},
  language  = {en}
}