Tailoring the Work Function of Chalcopyrite Thin Films with Self-Assembled Monolayers of Thiols

摘要

Self-assembled monolayers of fluorinated thiols have been used as a means of surface conditioning to modify the work function of polycrystalline, wide-gap, chalcopyrite thin films, The molecular dipole, characteristic of such polar molecules, could be transferred to the surface of the semiconductor Self-arrangement and orientation of the molecules upon adsorption ensured a net dipole contribution that was observed by means of ultra-violet photoemission spectroscopy Such an approach offers a simple way for interface engineering, with a potential impact on the design of compound-specific band alignments of chalcopyrite-based devices Molecular mechanics calculations of the expected molecular geometries complemented this work.