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Growth of organic semiconductor on heteromolecular layer
Mrhačová, Petra ; Redondo, Jesús (oponent) ; Procházka, Pavel (vedoucí práce)
This master's thesis focuses on the preparation and analysis of heteromolecular layers containing molecules of 1,3,5-benzenetribenzoic acid (BTB) or 4,4'-biphenyl-dicarboxy-lic acid (BDA) along with pentacene molecules on an Ag(111) substrate. the arrangement of molecules in such layers depends on several factors, including the amount of deposited molecules on the surface, the order in which the molecules are deposited, and the degree of deprotonation of their carboxylic groups. Subsequently, the growth of the organic semiconductor pentacene on the heterolayer containing BTB and pentacene molecules was studied. It was observed that the growth occurs in the form of large islands that grow dendritically. However, these islands are not compact but consist of small molecular clusters. All fabricated layers were examined under ultrahigh vacuum (UHV) conditions using a low-energy electron microscope (LEEM) and scanning tunneling microscope (STM).
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