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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (5): 782-790.DOI: 10.16553/j.cnki.issn1000-985x.2025.0258

• 研究论文 • 上一篇    下一篇

RbYS2电子结构、光学性质及本征缺陷诱导p型导电性的第一性原理研究

邹江1(), 谢泉2   

  1. 1.遵义师范学院物理与电子科技学院,遵义 563006
    2.贵州中医药大学信息工程学院,贵阳 550025
  • 收稿日期:2025-12-22 出版日期:2026-05-20 发布日期:2026-06-09
  • 作者简介:邹江(1987—),男,贵州省人,博士,副教授。E-mail:yywanj1@163.com
  • 基金资助:
    贵阳市科技平台建设项目(筑科合同〔2023〕7-3);遵义市科技计划项目(遵市科合HZ字〔2022〕122号);遵义市红花岗区科技计划项目(遵红科合师字〔2022〕07号)

First-Principles Study on Electronic Structure, Optical Properties, and Intrinsic Defect-Induced p-Type Conductivity of RbYS2

ZOU Jiang1(), XIE Quan2   

  1. 1.School of Physics and Electronic Science,Zunyi Normal University,Zunyi 563006,China
    2.School of Information Engineering,Guizhou University of Traditional Chinese Medicine,Guiyang 550025,China
  • Received:2025-12-22 Online:2026-05-20 Published:2026-06-09

摘要: 透明导电材料因兼具高可见光透射性和良好电导性,在光电子器件领域具有重要应用价值。然而,高性能 p型透明导电材料的开发仍面临挑战。基于密度泛函理论的第一性原理计算,本研究系统分析了RbYS2的电子结构、光学性质、力学性质及本征缺陷主导下的p型导电行为。计算结果表明,RbYS2为间接带隙半导体,禁带宽度为3.30 eV。光学性质计算显示,RbYS2在可见光能区内吸收较弱,表现出良好的透明特性。力学性质计算表明RbYS2具有良好的力学稳定性,且表现出明显的力学各向异性。进一步通过本征缺陷与载流子热力学模拟研究发现,在富S生长条件下,Rb空位(VRb)为最有利形成的受主型缺陷,形成能大小为1.14 eV,转移能级ε(0/-)位于价带顶(VBM)上方0.225 eV。缺陷在高温生长过程中形成并在1 200 K固定其浓度后快速淬火至室温时,体系的空穴浓度可达5.78×1018 cm-3,在室温下呈现稳定的p型导电特征。

关键词: RbYS2; 力学性质; 光学性质; 本征缺陷; 热力学模拟; 第一性原理; 密度泛函理论

Abstract: Transparent conductive materials have significant application value in the field of optoelectronic devices due to their combination of high visible light transmittance and good electrical conductivity. However, the development of high-performance p-type transparent conductive materials still faces challenges. Based on the first-principles calculations of density functional theory, this study systematically analyzed the electronic structure, optical properties and p-type conductive behavior dominated by intrinsic defects of RbYS2. The calculation results show that RbYS2 is an indirect bandgap semiconductor with a bandgap width of 3.30 eV. The optical property calculations indicate that RbYS2 exhibits weak absorption in the visible light region, demonstrating good transparency. Calculations of mechanical properties indicate that RbYS2 has good mechanical stability and exhibits obvious mechanical anisotropy. Further studies on intrinsic defects and carrier thermodynamics simulations reveal that under S-rich growth conditions, Rb vacancy VRb is the most favorably formed acceptor-type defect, with a formation energy of 1.14 eV, and a transition levelε(0/-) locates 0.225 eV above the valence band maximum(VBM). When the defects are formed during high-temperature growth and their concentration is fixed at 1 200 K followed by rapid quenching to room temperature, the hole concentration of the system can reach 5.78×1018 cm-3, presenting stable p-type conductive characteristics at room temperature while maintaining good optical transparency.

Key words: RbYS2; mechanical property; optical property; intrinsic defect; thermodynamic simulation; first-principle; density functional theory

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