Electronic structure of C and N co-doped TiO2: A combined hard x-ray photoemission spectroscopy and density functional theory study

Inci Ruzybayev, Seung Su Baik, Abdul K. Rumaiz, G. E. Sterbinsky, J. C. Woicik, Hyoung Joon Choi, S. Ismat Shah

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We have studied the electronic structure of C and N co-doped TiO2 using hard x-ray photoelectron spectroscopy and first-principles density functional theory calculations. Our results reveal overlap of the 2p states of O, N, and C in the system which shifts the valence band maximum towards the Fermi level. Combined with optical data we show that co-doping is an effective route for band gap reduction in TiO2. Comparison of the measured valence band with theoretical photoemission density of states reveals the possibility of C on Ti and N on O site.

Original languageEnglish
Article number221605
JournalApplied Physics Letters
Issue number22
Publication statusPublished - 2014 Dec 1


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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