Ein integrierter Ansatz zur organischen Optoelektronik; von der Synthese über die Verarbeitung bis zum Bauelement

• Antragsteller: Professor Dr. Peter Bäuerle; Professor Dr. Klaus Meerholz; Professor Dr. Klaus Müllen
• Fachliche Zuordnung: Organische Molekülchemie - Synthese, Charakterisierung
• Förderung: Förderung von 2007 bis 2010
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 35920985

• Erstellungsjahr: 2010

Zusammenfassung der Projektergebnisse

Supported by the DFG program, research partners from Ulm, Mainz and Köln have achieved successful outcomes in this link. During that 3-year project, the researchers from the collaborative groups have synthesized various π-conjugated oligomers and polymers with different dimensionalities for applications in organic electronics. Using different deposition methods, film forming as well as self-assembly of these materials were investigated and were correlated to the molecular structures. The compounds were incorporated into various devices and tested. In OPVs, power conversion efficiencies up to ca. 2.5 % PCE were achieved when using the soluble fullerene derivatives PC61BM and PC71BM as acceptors. The majority of compounds have been tested in OFETs, and the influence of the deposition method was investigated. There is no clear general answer as to which method is best suited, it simply depends on the compound. A record mobility of ca. 1 cm2/Vs has been demonstrated. PAAs were successfully incorporated into OLEDs by electrospraying, leading to an enhancement of the device efficiency. New intellectual property and several publications have been produced.

Projektbezogene Publikationen (Auswahl)

• “Field-Effect Transistors Based on a Benzothiadiazole−Cyclopentadithiophene Copolymer” J. Am. Chem. Soc. 2007, 129, 3472
  M. Zhang, H. N. Tsao, W. Pisula, C. Yang, A. K. Mishra, K. Müllen
  
• ”Macroscopically aligned films of discotic phthalocyanine by zone casting” Nanotechnology 2007, 18, 485303
  A. Tracz, T. Makowski, S. Masirek, W. Pisula, Y. H. Geerts
  
• “Novel organic semiconductors and processing techniques for organic field-effect transistors” Phys. Status Solidi A 2008, 205, 421
  H. N. Tsao, H. J. Räder, W. Pisula, A. Rouhanipour, K. Müllen
  
• “Subliming the Unsublimable: How to Deposit Nanographenes” Angew. Chem. Int. Ed. 2009, 48, 4602
  A. Rouhanipour, M. Roy, X. Feng, H.J. Räder, K. Müllen
  
• “The Influence of Morphology on High-Performance Polymer Field-Effect Transistors” Adv. Mater. 2009, 21, 209
  H. N. Tsao, D. Cho, J. W. Andreasen, A. Rouhanipour, D. W. Breiby, W. Pisula, K. Müllen
  
• “ Solution Processable Fluorenyl Hexa-peri-hexabenzocoronenes in Organic Field-Effect Transistors and Solar Cells” Adv. Funct. Mater. 2010, 20, 927
  W. W. H. Wong, T. B. Singh, D. Vak, W. Pisula, C. Yan, X. Feng, E. L. Williams, K. L. Chan, Q. Mao, D. J. Jones, C.-Q. Ma, K. Müllen, P. Bäuerle, A. B. Holmes
  
• “Dendritic Oligothiophenes Terminated with Trialkyloxyphenylethynyl Tails: Synthesis, Physical Properties and Self-assembly” Chem. Eur. J. 2010
  Ma, C.-Q.; Pisula, W.; Weber, C.; Feng, X.-L.; Müllen, K.; Bäuerle, P.
  
• “Efficient bulk heterojunction solar cells containing hexa-peri-hexabenzocoronene and oligothiophene dendron hybrids” Chem. Mater. 2010, 22, 457
  W. W. H. Wong, C.-Q. Ma, W. Pisula, X. Feng, D. J. Jones, K. Müllen, R. A. J. Janssen, P. Bäuerle, A. B. Holmes
  
• “Terthiophene−Perylene diimides: Color Tuning via Architecture Variation” J. Phys. Chem. B 2010, Online
  H. Wonneberger, C.-Q. Ma, M. A. Gatys, M. Liu, C. Li, P. Bäuerle, K. Müllen