有機ガス処理されたバナジルフタロシアニン(VOPc)薄膜の配向

Abstract

Vanadyl-Phthalocyanine (VOPc) thin films were fabricated on KBr substrate by molecular beam epitaxy method. VOPc thin films prepared on KBr substrate transit from epitaxy to pseudomorphic layer with the increase of thickness. Therefore, when changing from pseudomorphic layer to epitaxy, organic gas treatment has been applied to VOPc thick film having the morphology of a pseudomorphic layer. VOPc thick film having thickness of the order of 200 nm, treated with organic gas, changed from pseudomorphic layer to epitaxy. However, the mechanism of the change from pseudomorphic layer to epitaxy remains unclear. Therefore, to investigate the interaction of donor-acceptor, the morphologies of VOPc thick film treated with organic gas having strong acceptor and small acceptor characteristics were mainly investigated by UV/Vis spectra measured by UV/Vis spectrometer. That organic gas having strong acceptor is closely related to transit from pseudomorphic layer to epitaxy was determined from the analysis of UV/Vis spectra measured by UV/Vis spectrometer. The results show that the transition from pseudomorphic layer to epitaxy depends strongly upon the interaction between the donor characteristics of VOPc molecules and acceptor characteristics of organic gas.