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  Hofmann, A.; Janocha, E.; Kelleter, F.; Pettenkofer, C.: Composition at the CuInSe₂/ZnO interface: copper-depletion induced by diethyl-zinc. Physica Status Solidi A 211 (2014), p. 1966-1971

10.1002/pssa.201330357
Open Access Version

Abstract:
Abstract The interface formation between epitaxial CuInSe2(112) films and ZnO deposited by metal-organic MBE is investigated by photoelectron spectroscopy. Reaction of diethyl-zinc with CuInSe2 leads to the formation of an intrinsic ZnSe layer and copper-depletion of the interface. This is associated with Zn doping of the chalcopyrite surface and a Fermi level shift towards the conduction band. The implications on the band alignment are discussed.