The growth of α-sexithiophene films on Ag(111) studied by means of PEEM with linearly polarized light

Add time:07/16/2019    Source:sciencedirect.com

In this study, we used photo electron emission microscopy (PEEM) to investigate the growth of α-sexithiophene (α-6T) on Ag(111) surfaces. The experiments were carried out with linearly polarized ultraviolet-light (Hg lamp with hν=4.9 eV) in order to probe the alignment of the molecules on the surface. In particular, we acquired images before, during, and after growth while changing the polarization in a stepwise manner. For the stationary states of the clean and the α-6T covered surfaces, we monitored the local electron yield and the intensity of the ultraviolet C-light (100–280 nm) reflected from the whole sample using PEEM and a photodiode, respectively. Due to the high ionization potential (IP>5eV), there is no direct photoelectron emission from the organic crystallites. However, the photoelectron emission of the metal/organic interface is influenced by anisotropic absorption of the incident light beam, since the adsorbed molecules act as dichroic filters with distinct orientations.

We also recommend Trading Suppliers and Manufacturers of ALPHA-SEXITHIOPHENE (cas 88493-55-4). Pls Click Website Link as below: cas 88493-55-4 suppliers

Prev:Orientation management of α-sexithiophene layer for the application in organic photovoltaic devices
Next:Electronic structure of α-sexithiophene ultrathin films grown on passivated Si(0 0 1) surfaces)