Ballistic Electron Transport Through Organic Semiconductors - Özcan, Soner
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In the framework of this thesis Ballistic Electron Emission Microscopy/ Spectroscopy (BEEM/S) was used to investigate semiconductor heterostructures. Including organic semiconductors like titanylphthalocyanine (TiOPc) and hexa-peri hexabenzocoronene (HBC). Analyzing the BEEM spectra we find that the TiOPc increases the BEEM threshold voltage compared to reference Au/GaAs diodes. The energy dependent electron transmission properties of TiOPc were investigated too. Additionally, an approach for the determination of the attenuation length of TiOPc as a function of energy has been successfully…mehr

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Produktbeschreibung
In the framework of this thesis Ballistic Electron Emission Microscopy/ Spectroscopy (BEEM/S) was used to investigate semiconductor heterostructures. Including organic semiconductors like titanylphthalocyanine (TiOPc) and hexa-peri hexabenzocoronene (HBC). Analyzing the BEEM spectra we find that the TiOPc increases the BEEM threshold voltage compared to reference Au/GaAs diodes. The energy dependent electron transmission properties of TiOPc were investigated too. Additionally, an approach for the determination of the attenuation length of TiOPc as a function of energy has been successfully introduced. Finally, the Schottky barrier heights of Au/HBC/GaAs heterostructures were investigated by BEEM. The high barrier at the HBC-GaAs interface makes this material a promising interfacial layer for increasing the open circuit voltage of GaAs Schottky barrier solar cells.
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Autorenporträt
Dr. Techn. Dipl. Ing. Soner Özcangeb. März 1977, Diplom 2005 an der technischen Universität Wien,Promotion 2008 an der technischen Universität Wien.Hauptarbeitsgebiete: Festkörperphysik, Magnetismus,Halbleiterphysik, organische Halbleiter, elektrischer Transportdurch Halbleiter Heterostrukturen.