Daniel Franta, David Nečas, Lenka Zajíčková, Vilma Buršíková, Christoph Cobet

Combination of synchrotron ellipsometry and table-top optical measurements for determination of band structure of DLC films

Thin Solid Films 519 (2011) 2694-2697

Model of the DLC band structure that took into account valence to conduction band transitions, π → π^∗ and σ → σ^∗, and valence to extended states transitions σ → ξ^∗ was confirmed by using the synchrotron ellipsometry at BESSY II in the range 5–30 eV combined with table-top ellipsometry and spectrophotometry in UV-IR range. The range up to 30 eV covered all the transitions from valence to conduction bands because the maximum energy transition of π → π^∗ and σ → σ^∗ were 9.03 and 28.1 eV, respectively. The band gaps of these transitions were 0.75 and 4.74 eV, respectively.

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