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Semiconductor Physics, Quantum Electronics & Optoelectronics. 2008. V. 11, N 2. P. 136-140.
Study of diamond-like carbon films doped
with transition metals and used as cathodes
for current creation in water
V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine
45, prospect Nauky, 03680 Kyiv, Ukraine
E-mail: pve18@isp.kiev.ua
Abstract. Properties of diamond-like carbon films (DLCF) on n-Si substrates used as
cathodes in Yb – DLCF (n-Si) water electrochemical system have been studied by
current creation with water decomposition H 2 O → OH – + H + . The current is several
times higher after preliminary electrolytic deposition of impurity that contains one of the
transition metals (Pd, Pt, Ni, Cr) on DLCF (n-Si) layer, which changes the nature of the
catalytic process of water decomposition. The aging effect of DLCF (n-Si) 〈Me〉 was
observed after 7- to 25-day metal oxidation in air. It is confirmed the change of the
electron work function of CDL (n-Si) 〈Me〉 electrode and the current change between it
and the Yb electrode.
Keywords: electrochemical system, catalytic process, diamond-like carbon film,
transition metal.
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