V. Saltas et al., Synchrotron radiation studies of transition metal selenide thin-films formation on Ti, Mo and Cu substrates: in and out diffusion of Li, THIN SOL FI, 389(1-2), 2001, pp. 307-314
In this paper we study the formation of transition metal selenide thin-film
s. The investigation took place in ultra high vacuum (UHV) by means of phot
oemission spectroscopy with synchrotron radiation. The films were produced
by simultaneous co-adsorption of TiCI4 and elemental Se on polycrystalline
Ti, Mo and Cu substrates, at 250 degreesC. The above co-adsorption on Ti pr
oduces thin-films of TiSe2 layer compounds, whereas, on the Mo and Cu subst
rates, Se interacts directly with the substrate producing a MoSe2 layer com
pound and Cu2-xSe thin-films, respectively. Deposited Li is intercalated in
to both TiSe2 and MoSe2 layer compound thin-films while it interacts with t
he non-layered Cu2-xSe producing an alkalimetal copper selenide compound (L
ixCuySez). When the above LixCuuSez and Li-intercalated TiSe2, MoSe2 thin f
ilms are exposed to TiCl4 at 140 degreesC, TiCl4 dissociates, leading to a
strong Li+-Cl- interaction and the formation of a LiCl overlayer. (C) 2001
Elsevier Science B.V. All rights reserved.