Structural and chemical features of Gd:BaTiO3 solid solutions prepared by microwave-assisted heat treatment

Yun, Han-Sol; Shim, Jae-Hyeon; Kim, Yongseon; Kim, Su-Yeon; Shin, So-Young; Park, Kwonjin; You, Chun‐Yeol; Jeong, Dae-Yong; Cho, Nam-Hee

doi:10.1007/s12034-021-02524-0

Cited by 1 publication

(1 citation statement)

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“…Therefore, it is suggested as a dopant for BaTiO 3 in this work. In Gd 3+ doped BaTiO 3 , substituting Gd 3+ ions on the Ba 2+ or Ti 3+ site in the crystalline structure is proportional to the doping proportion, thus influencing the material's electrical and optical features [9]. A previous study by our team found that Ba 0.9 Gd 0.1 TiO 3 has a significant transmittance within the visible spectrum and a relatively high energy band gap [10].…”

Section: Introductionmentioning

confidence: 97%

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: Introductionmentioning

confidence: 97%