RT Journal Article T1 Characterization of Tunneled Wide Band Gap Mixed Conductors: The Na2O-Ga2O3-TiO2 System A1 García Fernández, Javier A1 Hernando González, María A1 Torres Pardo, María De La Almudena A1 López García, María Luisa A1 Fernández-Díaz, María Teresa A1 Zhang, Qing A1 Terasaki, Osamu A1 Ramírez Castellanos, Julio A1 González Calbet, José María AB This article focuses on the Na2O-Ga2O3-TiO2 system, which is barely explored in the study of transparent conductive oxides (TCOs). NaxGa4+xTin−4−xO2n−2 (n = 5, 6, and 7 and x ≈ 0.7–0.8) materials were characterized using neutron powder diffraction and aberration-corrected scanning transmission electron microscopy. Activation energy, as a function of different structures depending on tunnel size, shows a significant improvement in Na+ ion conduction from hexagonal to octagonal tunnels. New insights into the relationship between the crystal structure and the transport properties of TCOs, which are crucial for the design and development of new optoelectronic devices, are provided. PB MDPI SN 2079-4991 YR 2023 FD 2023 LK https://hdl.handle.net/20.500.14352/91873 UL https://hdl.handle.net/20.500.14352/91873 LA eng NO García-Fernández, J.; Hernando, M.; Torres-Pardo, A.; López, M.L.; Fernández-Díaz, M.T.; Zhang, Q.; Terasaki, O.; Ramírez-Castellanos, J.; González-Calbet, J.M. Characterization of Tunneled Wide Band Gap Mixed Conductors: The Na2O-Ga2O3-TiO2 System. Nanomaterials 2023, 13, 2054. https://doi.org/10.3390/nano13142054 NO Comunidad de Madrid NO Ministerio de Ciencia, Innovación y Universidades (España) NO Ministerio de Economía y Competitividad (España) DS Docta Complutense RD 8 abr 2025