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A comparative study on optical properties of BiOI, Bi7O9I3 and Bi5O7I materials
Optical Materials ( IF 3.9 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.optmat.2020.110677
R.MD Matiur , A.A. Abuelwafa , S. Kato , N. Kishi , T. Soga

Abstract This investigation clarifies the optical properties of successive ionic layer adsorption and reaction (SILAR)-prepared BiOI, Bi7O9I3, and Bi5O7I thin films. In our study, after the annealing treatment, BiOI material transforms into Bi7O9I3 and Bi5O7I crystal phase. The crystal structure, morphology and elemental analysis have been confirmed by X-Ray Diffraction (XRD), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectrometer (EDS) analysis. Moreover, we have checked and validified phase transformation and weight loss by thermo-gravimetric (TG) analysis. Here, the comparative optical characterization and assessment of the BiOI and derivatives films have been done by transmittance and reflectance. Meanwhile, with the single-oscillator Wemple-Di Domenico model, the refractive index's dispersion has been presented for BiOI, Bi7O9I3, and Bi5O7I. Interestingly, comparative analysis shows that nonlinear optical behavior becomes lower after phase transformation, confirmed via the second-order reflective index and nonlinear susceptibility estimation. This investigation will open a new window for BiOI based materials to consider it for the nonlinear optical device.

中文翻译:

BiOI、Bi7O9I3和Bi5O7I材料光学性能的比较研究

摘要 本研究阐明了连续离子层吸附和反应 (SILAR) 制备的 BiOI、Bi7O9I3 和 Bi5O7I 薄膜的光学性质。在我们的研究中,经过退火处理后,BiOI 材料转变为 Bi7O9I3 和 Bi5O7I 晶相。晶体结构、形貌和元素分析已通过 X 射线衍射 (XRD)、场发射扫描电子显微镜 (FESEM)、能量色散 X 射线光谱仪 (EDS) 分析得到证实。此外,我们通过热重 (TG) 分析检查并验证了相变和重量损失。在这里,BiOI 和衍生物薄膜的比较光学表征和评估是通过透射率和反射率完成的。同时,对于单振荡器 Wemple-Di Domenico 模型,折射率' 已经为 BiOI、Bi7O9I3 和 Bi5O7I 提供了 s 色散。有趣的是,比较分析表明,通过二阶反射率和非线性磁化率估计,相变后非线性光学行为变得更低。这项研究将为基于 BiOI 的材料打开一个新窗口,将其用于非线性光学器件。
更新日期:2021-01-01
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