Co-deposited films of rod like conjugated molecules [Elektronische Ressource] : from phase separation to mixing / von Jörn-Oliver Vogel

Co-deposited films of rod-like conjugated molecules: from phase separation to mixing DISSERTATION zur Erlangung des akademischen Grades doctor rerum naturalium (Dr. rer. nat.) im Fach Physikeingereicht an der Mathematisch-Naturwissenschaftlichen Fakultät I Humboldt-Universität zu Berlin von Herrn Dipl. Phys. Jörn-Oliver Vogel geboren in Berlin Präsident der Humboldt-Universität zu Berlin: Prof. Dr. C. Markschies Dekan der Mathematisch-Naturwissenschaftlichen Fakultät I: Prof. Dr. L.-H. Schön Gutachter: 1. Dr. Norbert Koch 2. Prof. Beate Röder 3. Prof. Annalisa Bonfiglio eingereicht: 2.4.2009 Datum der Promotion: 6.7.2009 für meine Eltern und Großeltern I AbstractThis thesis is centered on studies of phase separation and mixing in co-deposited thin films of rod-like conjugated molecules. The main focus is to determine which molecular properties lead to phase separation and/or mixing of two materials. To address this question I used five materials, of importance in the context of “organic electronics”: pentacene (PEN), quaterthiophene (4T), sexithiophene (6T), p-sexiphenylene (6P), dihexylsexithiophene (DH6T). With these it was possible to form material pairs which differ in the parameters: energy levels, length of the conjugated core, and alkyl-end-chain-substitution.