红外与毫米波学报2025，Vol.44Issue(2)：153-160,8.DOI:10.11972/j.issn.1001-9014.2025.02.002
MoTe2量子点薄膜的制备及椭圆偏振光谱研究
Study on the preparation and spectroscopic ellipsometry of MoTe2 quantum dot films
摘要
Abstract
The preparation of quantum dot thin films and the accurate measurement of optical constants are particularly important for promoting the development of quantum dot applications in the optoelectronic fields.At present,the opti-cal constant characterization technology for MoTe2 single crystal thin films prepared by mechanical exfoliation and chem-ical vapor deposition methods is relatively mature.However,the optical constants of 2H-MoTe2 quantum dot films are rarely reported.In this work,2H-MoTe2 quantum dots were prepared by ultrasonic assisted liquid phase exfoliation,and 2H-MoTe2 quantum dots with two sizes were acquired via adjusting the type of solvent and the order of ultrasonic pro-cess.The optical constants such as refractive index,extinction coefficient and dielectric constant of quantum dot films with two sizes were studied by B-spline model and Tauc-Lorentz model using spectroscopic ellipsometry.The results demonstrate that 2H-MoTe2 quantum dots with two sizes have similar refractive indices,extinction coefficients and a wider spectral absorption range from the visible to near-infrared band.And compared with MoTe2 bulk material,2H-MoTe2 quantum dots have a lower dielectric constant.关键词
光学常数/椭圆偏振光谱/MoTe2量子点薄膜Key words
optical constant/spectroscopic ellipsometry(SE)/MoTe2 quantum dot film分类
数理科学引用本文复制引用
李国彬,陈晟迪,杨丽,张艳,胡坤,张泰玮,杨奥,夏溢坪,李学铭,唐利斌,杨培志,王善力..MoTe2量子点薄膜的制备及椭圆偏振光谱研究[J].红外与毫米波学报,2025,44(2):153-160,8.基金项目
国家重点研发计划(2019YFB2203404) （2019YFB2203404）
云南省科技厅科技人才与平台计划项目(202205AC160026)Supported by the National Key Research and Development Program(2019YFB2203404),the Science and Technology Talents and Platform Project of Science and Technology Department of Yunnan Province(202205AC160026) （202205AC160026）
