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Research Group "Halbleiter- und Festkörperphysik, JKU Linz"
(Ao.Univ.Prof. Dr. DI. Mag. Helmut Sitter)

Head of the research group:
Last name:Sitter
First name(s):Helmut
Title (leading):Ao.Univ.Prof. Dr. DI. Mag.
Institution:Johannes Kepler University Linz
Organizational unit:Institut für Halbleiter- und Festkörperphysik
Street address:Altenbergerstraße 69
Postal code:4040
Assignments to Research Areas:
Research area(s):
  • Solid State Physics
Assignments to Fields of Work According to the Austrian System of Science Areas:
Field(s) of work:
  • Solid state physics (103009)
  • Surface physics (103020)
Data Acquisition:
Date of the data acquisition:31.05.2011
Data acquisition period:from: 2005   up to including: 2009
Research Group at the Time of the Data Acquisition:
Scientific group members:
9 Persons
Dr. Clemens Simbrunner
Dr. Gerardo Hernandez Sosa
DI Günter Schwabegger
MSc. Mujeeb Ullah
MSc. Rizwan Ahmed
MSc. Kamilla Rehman
MSc. Shaimaa Abd Al Baqi
Irene Watzinger
Birgit Plochberger
Percentage project-funded:80
Scientific Output in the Above Data Acquisition Period:
H-index of the group head:23
Five most important publications:
  1. T. Anthopoulos, B. Singh, N. Marjanovic, N. S. Sariciftci, A. Ramil, H. Sitter, M. Cölle, D. de Leeuw, High performance n-channel organic field-effect transistors and ring oscillators based on C60 fullerene films, Appl. Phys. Lett 89, 213504/1-3 (2006)
  2. F. Cordella, F. Quochi, M. Saba, A. Andreev, H. Sitter, N. S. Sariciftci, A. Mura, G. Bongiovanni, Optical Gain Performance of Epitaxially Grown para-Sexiphenyl Films, Adv. Mat., 19, 2252-2256 (2007)
  3. F. Quochi, M. Saba, F. Cordella, A. Gocalinska, R. Corpino, M. Marceddu, A. Anedda, A. Andreev, H. Sitter, N. S. Sariciftci, A. Mura, G. Bongiovanni, Temperature Tuning of Nonlinear Exciton Processes in Self-Assembled Oligophenyl Nanofibers under Laser Action, Adv. Mat. 20, 3017-3021 (2008)
  4.   G. Hernández-Sosa, C. Simbrunner, H. Sitter, Growth and optical properties of alpha-sexithiopene doped para-sexiphenyl nanofibers, Appl. Phys. Lett., 95, 013306/1-3 (2009)
  5. C. Simbrunner, F. Quochi, G. Hernandez-Sosa, M. Oehzelt, R. Resel, G. Hesser, M. Arndt, M. Saba, A. Mura, G. Bongiovanni and H. Sitter, Organic-organic hetero-epitaxy of red, green and blue emitting nano-fibers, ACS Nano, online
Projects and Funding Granted in the Above Data Acquisition Period:
Competitive projects:
  • FWF:
    Photo-Enhanced Epitaxy of Organic Thin Films
    Laufzeit: 2002-2005; Mittel: 240 kEuro
  • FWF:
    Highly Ordered Small Molecule Thin Films
    Laufzeit: 2002 - 2005; Mittel: 280 kEuro
  • FWF:
    Coordination of NFN - Interface Controlled and Functional Organic Films
    Laufzeit: 2006 - 2009; Mittel: 45 kEuro
  • FWF:
    Organic Films Grown by HWE
    Laufzeit: 2006 - 2009; Mittel: 305 kEuro
  • FWF:
    Organic Solar Cells
    Laufzeit: 2006 - 2009; Mittel: 124 kEuro
  • FWF:
    Coordination of NFN - Interface Controlled and Functional Organic Films
    Laufzeit: 2009 - 2012; Mittel: 25 kEuro
  • FWF:
    Organic Films Grown by HWE
    Laufzeit: 2009 - 2012; Mittel: 340 kEuro
Research Topics:
Current research topics:
  • The aim of our scientific work is to understand and tailor the growth of small molecule thin films interesting for electronic and photovoltaic applications.
Future topics (next 5 years):
  • We will continue the successful way of layer growth and extend our investigations to new types of molecules like PPNB, H2TPP and HATCN and to new crystalline and non-crystalline substrates, including functionalized and pre-structured surfaces as well as self-assembled organic monolayers as pseudo-substrates.
Teaching and Research Mobility in the Above Data Acquisition Period:
Doctor's theses:
5 doctor's theses
  1. Klaus Schmiedegg: Growth and optical characterization of GaN and ist ternary compounds, JKU 2005
  2. Clemens Simbrunner: Real time control of MOCVD grown III-nitride layers by x-ray diffraction and optical methods, JKU 2007
  3. Gerardo Hernandez Sosa: Growth and characterization of parahexaphenyl nanostructures on organic and inorganic substrates, JKU 2009
  4. Mujeeb Ullah: Organic field effect transistors based on c60 layers grown by Hot Wall Epitaxy
  5. Shaimaa Abd Al-Baqi: Growth and characterization of rubrene layers
Diploma and master theses:
2 theses
  1. Birgit Plochberger: Barium doped C60 for organic FETs
  2. Günter Schwabegger: Parylene dielectric layers for C60 OFETs, JKU 2009
International networking:
  • Dr. Gerardo Hernandez Sosa: University of Santa Barbara, California, USA
  • Dr. Klaus Schmiedegg: Huek Folien
  • Birgit Plochberger: PhD position Bio-Physics
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