Spectroscopic-ellipsometry study of the optical properties of ZnO nanoparticle thin films

IF 1.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

MRS Communications Pub Date : 2024-08-22 DOI:10.1557/s43579-024-00626-4

Khagendra P. Bhandari, Dhurba R. Sapkota, Balaji Ramanujam

引用次数: 0

Abstract

We described optical properties of zinc oxide (ZnO) nanoparticles determined by spectroscopic ellipsometry analysis from ex situ spectroscopic ellipsometry (ex situ SE) measurements made on nanocrystalline thin films over a spectral range of 0.734 to 4.00 eV. We determined the complex refractive index function, \(\widetilde{n}(\omega )=n(\omega )+i\kappa (\omega )\), by fitting a layered parametric model to the ellipsometric measurements. We collected SE measurements at an incidence angle of 70°. We also determined absorption coefficient spectra using extinction coefficient, κ and wavelength, λ. The direct optical bandgap of the films was obtained as 3.2 eV using the ellipsometric method.

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氧化锌纳米粒子薄膜光学特性的光谱-椭偏研究

我们描述了通过原位光谱椭偏仪（ex situ SE）测量纳米晶体薄膜在 0.734 至 4.00 eV 光谱范围内的光谱椭偏仪分析确定的氧化锌（ZnO）纳米颗粒的光学特性。我们通过对椭偏测量结果拟合分层参数模型，确定了复折射率函数（\widetilde{n}(\omega )=n(\omega )+i\kappa (\omega )\ ）。我们收集了入射角为 70° 的 SE 测量值。我们还使用消光系数κ和波长λ测定了吸收系数光谱。使用椭偏方法得出薄膜的直接光带隙为 3.2 eV。

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来源期刊

MRS Communications MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

2.60

自引率

10.50%

发文量

166

审稿时长

>12 weeks

期刊介绍： MRS Communications is a full-color, high-impact journal focused on rapid publication of completed research with broad appeal to the materials community. MRS Communications offers a rapid but rigorous peer-review process and time to publication. Leveraging its access to the far-reaching technical expertise of MRS members and leading materials researchers from around the world, the journal boasts an experienced and highly respected board of principal editors and reviewers.