Optical and Dielectric Characterization of Atomic Layer Deposited Nb2O5 Thin Films

Abstract

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Photoassisted atomic layer deposition of oxides employing alkoxides as single-source precursors

“…These values are all above the density of crystalline, monoclinic Nb 2 O 5 (4.60 g/cm 3 ) but closer to the density of orthorhombic Nb 2 O 5 (4.98 g/cm 3 ) but still clearly below the density of NbO 2 (5.90 g/cm 3 ). The observed densities here are also higher than densities between 3.9 and 4.5 g/cm 3 reported for thermal ALD Nb 2 O 5 by Blanquart et al 28 The high density is in line with the stoichiometry derived from the TOF-ERDA composition in Table I: the film is slightly oxygen deficient (Nb 2 O 4.7 ). This may indicate that Nb has partially reduced from +V to +I-V; however, analysis beyond the scope of this study by x-ray photoelectron spectroscopy or x-ray absorption spectroscopy is required to confirm the Nb reduction.…”

Electrochromic Properties of Graphene Doped Nb2O5 Thin Film

“…Nb 2 O 5 thin film has also high refraction index (2.2-2.6) and high transparency in UV-vis region. 5 Since Reichman and Bard discovered the electrochromic properties of Nb 2 O 5 , several investigations have been performed to show performance of the electrochemical properties. 6,7 Nb 2 O 5 is a cathodic coloration material and it turns to blue or brown-like color during the coloration process.…”

Influence of an Inorganic Interlayer on Exciton Separation in Hybrid Solar Cells

“…We note that prepared P3HT/Nb 2 O 5 cells without the TiO 2 film as an electron-accepting layer showed poor device performance because of negligible photocurrent, likely due to the significant increase in series resistance when the TiO 2 layer is replaced by the dielectric Nb 2 O 5 . − We therefore argue that only the combination of TiO 2 and Nb 2 O 5 (giving rise to the energy cascade and subsequent reduction in interfacial recombination) leads to an efficiency enhancement (see Supporting Information S3).…”