10.1021/jp502092h.s001 Maria Vasilopoulou Maria Vasilopoulou Ioannis Kostis Ioannis Kostis Nikolaos Vourdas Nikolaos Vourdas Giorgos Papadimitropoulos Giorgos Papadimitropoulos Antonios Douvas Antonios Douvas Nikolaos Boukos Nikolaos Boukos Stella Kennou Stella Kennou Dimitris Davazoglou Dimitris Davazoglou Influence of the Oxygen Substoichiometry and of the Hydrogen Incorporation on the Electronic Band Structure of Amorphous Tungsten Oxide Films American Chemical Society 2014 Oxygen Substoichiometry plasma oscillations 1 eV latter case oxygen substoichiometry tungsten oxide films tungsten oxide hydrogen incorporation CB hydrogen ions Hydrogen Incorporation energy gap IB conduction band Electronic Band Structure tungsten ions stoichiometric tungsten oxide Amorphous Tungsten Oxide FilmsThe influence 2014-06-19 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Influence_of_the_Oxygen_Substoichiometry_and_of_the_Hydrogen_Incorporation_on_the_Electronic_Band_Structure_of_Amorphous_Tungsten_Oxide_Films/2281405 The influence of the oxygen substoichiometry and of the hydrogen incorporation on the electronic structure of amorphous tungsten oxide films was investigated. It was found that both of them cause the appearance of intermediate bands (IBs) within the energy gap; approximately 3 and 1 eV below the edge of the conduction band (CB), respectively. The hydrogen is incorporated into the W–O network bonding either to the oxygen or to the tungsten ions. In the former case, the electronic structure of the material retains the characteristics of amorphous stoichiometric tungsten oxide with, additionally, the two IBs. In the latter case, the electronic structure of tungsten oxide is seriously perturbed because in addition to the IBs the 1s orbitals of the hydrogen also contribute to the formation of the edges of valence and CBs causing the delocalization of electrons. Carriers donated by the incorporated hydrogen ions are excited in the CB, causing plasma oscillations and red shifting photoluminescence.