Structural, Dielectric and AC Conduction Studies on Vacuum Evaporated BaTiO&lt;SUB&gt;3&lt;/SUB&gt; Nano Thin Films Prepared from BaTiO&lt;SUB&gt;3&lt;/SUB&gt; Nano Particles

Sengodan, R.; Shekar, B. Chandar; Sathish, S.

doi:10.1166/jno.2013.1484

Cited by 3 publications

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“…The refractive index of polycrystalline films is often controlled by film crystallinity, electronic band structure, lattice point defect, and film density. According to SENGODAN et al [18], the refractive index of the thin film is proportional to electronic polarization, which is also inversely proportional to the interatomic spacing. Interatomic spacing refers to the distance between atoms in the material.…”

Section: Msementioning

confidence: 99%

A study on the refractive index of sol-gel Ba1-xGdxTiO3 thin films using spectroscopic ellipsometry

A. Saif,

Teh,

Poopalan

2023

Matéria (Rio J.)

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Ba 1-x Gd x TiO 3 thin films have been fabricated at different Gd 3+ ionic concentrations, film thicknesses, and annealing temperatures using the sol-gel method. The refractive index of the Ba 1-x Gd x TiO 3 films on a silicon substrate is characterized using Spectroscopic Ellipsometry (SE), where the ellipsometry angles Ψ and Δ are fitted very well with the Cauchy dispersion model. The results show that the refractive index at 632.8 nm decreases from 2.18 to 1.892 with the increase of the Gd 3+ ratio, while it increases with film thickness and annealing temperature. This trend for refractive index variation is explained based on interatomic spacing and density densification of the films. Using Wemple-Di Domenico (WDD) model shows that the dispersion energy increases with film thickness and annealing temperature and decreases with Gd 3+ doping. The relatively high refractive index of the samples supports the possibility of using Ba 1-x Gd x TiO 3 thin films as AR coating for solar cells.

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Section: Msementioning

confidence: 99%