Growth of Pb-Phthalocyanine Thin Films on MoS<sub>2</sub> Surfaces Studied by Means of Low-Energy Electron Transmission Spectroscopy

Nobuo Ueno, Katsumi Suzuki, Masahiro Momose, Masato Kushida Masato Kushida, Kazuyuki Sugita

Japanese Journal of Applied Physics · 1994 · 16 citations · 18 references

Concepts

Abstract

Low-energy electron transmission (LEET) spectroscopy was used to study the growth of Pb-phthalocyanine (PbPc) thin films on MoS 2 single crystal surfaces. We observed LEET features typical of the ultrathin films which were prepared by direct molecular-beam deposition of PbPc molecules as well as by thinning thicker films by heat treatment. The dependence of the work function of the film on the film thickness gave a minimum value for the ultrathin films which exhibit LEET features different from those for thicker films. The results indicate that the ultrathin film consists of a monolayer of PbPc molecules and LEET spectroscopy is useful in observing monolayer growth of functional organic molecules. Furthermore, the effects of heat treatment and aging of the PbPc films are investigated.

References

18