Effect of bi-directional tensile strain on photoelectric properties of Si-doped of ZrS₂

IF 2.1 4区 材料科学 Q3 CHEMISTRY, MULTIDISCIPLINARY
Zhihong Shi, Ying Wang, Nan Yang, Jinghan Ji, Guili Liu, Guoying Zhang
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引用次数: 0

Abstract

In this paper, we explore how deformation affects the stability and optoelectronic properties of Si-doped ZrS₂ using first-principles density functional theory. A range of properties—including cohesive energy, energy bands, density of states, absorption coefficients, and reflectivity—were investigated. Structural optimization of the pristine and Si-doped systems was performed using automatic optimization methods. The study reveals that pristine monolayer ZrS₂ is an indirect bandgap material. However, Si doping alters the bandgap, leading to a transition from semiconductor to metallic properties. Moreover, bi-directional tensile and compressive strains significantly modify the electronic and optical properties. Optical analyses indicate that compressive strain significantly increases the absorption coefficient, reflectance, and energy loss of the material in the infrared and visible regions, while tensile strain significantly increases the absorption coefficient, reflectance, and energy loss of the material in the ultraviolet region. These findings offer potential guidance for applying 2D materials in photoelectric devices, sensors, and related fields.

双向拉伸应变对si掺杂ZrS 2光电性能的影响
在本文中,我们利用第一性原理密度泛函理论探讨了变形如何影响si掺杂ZrS 2的稳定性和光电性能。研究了一系列性能,包括内聚能、能带、态密度、吸收系数和反射率。采用自动优化方法对原始体系和掺硅体系进行结构优化。研究表明,原始单层ZrS₂是一种间接带隙材料。然而,Si掺杂改变了带隙,导致从半导体到金属性质的转变。此外,双向拉伸和压缩应变显著改变了电子和光学性质。光学分析表明,压缩应变显著增加了材料在红外和可见光区的吸收系数、反射率和能量损失,而拉伸应变显著增加了材料在紫外区的吸收系数、反射率和能量损失。这些发现为二维材料在光电器件、传感器及相关领域的应用提供了潜在的指导。
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来源期刊
Journal of Nanoparticle Research
Journal of Nanoparticle Research 工程技术-材料科学:综合
CiteScore
4.40
自引率
4.00%
发文量
198
审稿时长
3.9 months
期刊介绍: The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size. Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology. The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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