Study of surface morphology and optical properties of Nb2O5 thin films with annealing

Synthesis and characterization of Nb2O5@C core-shell nanorods and Nb2O5nanorods by reacting Nb(OEt)5via RAPET (reaction under autogenic pressure at elevated temperatures) technique

“…Using this method, from the spectrum we calculated the band gap of Nb 2 O 5 to be 3.8 eV (325 nm). The value of the band gap energy is shorter than that in the literature, where the bulk band gap is 4.87 eV [15]. We have no explanation for the discrepancy between the bulk value and the band gap measured in this study.…”

The effects of heat treatment on optical, structural, electrochromic and bonding properties of Nb2O5 thin films

“…In recent years, Nb 2 O 5 films have attained considerable interest for electrochromic (EC) devices because of their crystal-structure-dependent electrochromic properties. The optical and structural properties of Nb 2 O 5 films depend strongly on stoichiometry, crystal structure, and surface roughness [1][2][3][4][5][6][7][8]. Therefore, it is necessary to research the role of deposition and post-deposition parameters on the film properties.…”

Facile preparation of a Nb2O5 blocking layer for dye-sensitized solar cells

“…A liquid electrolyte (Iodolyte AN-50, Solaronix) was injected into the hole on the backside of the counter As the thickness of the initial Nb thin films increased, characteristic peaks of orthorhombic Nb 2 O 5 appeared and their intensities increased. As a typical n-type, wide bandgap semiconductor (E g =3.4 eV), Nb 2 O 5 is the most thermodynamically stable phase among the various niobium oxides [13]. This indicates that the post-annealing treatment converts metallic Nb to crystalline Nb 2 O 5 well, despite volume expansion due to Nb-O bonding.…”