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使用MOCVD制作HfS2薄膜的新合成方法

Jean-Pierre Glauber1,2, Nils Boysen3, Silan Baspinar2

  • 1Leibniz Institute for Solid State and Materials Research, Helmholtzstr. 20, 01069 Dresden, Germany.

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PubMed
概括

研究人员开发了一种新的金属有机化学蒸气沉积 (MOCVD) 方法,用于使用新型前体的 hafnium disulfide (HfS2). 这一突破使高质量的HfS2薄膜生长成为可能,这对于下一代半导体设备至关重要.

关键词:
"2D TMDCs,海二硫化物,海二硫化物电气特性 电气特性金属有机化学蒸汽沉积沉积.化学前体的前体化学

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 半导体物理 半导体物理

背景情况:

  • 甲二硫化 (HfS2) 是一个有前途的二维半导体,其性能可能会超过MoS2和WS2.
  • 它的原生氧化物HfO2是一种成熟的高k介电体,具有协同效应的优势.
  • 由于前体的限制,现有的合成方法,如MOCVD,尚未成功地应用于HfS2.

研究的目的:

  • 开发第一个金属有机化学蒸汽沉积 (MOCVD) 方法来合成高质量的HfS2.
  • 引入和评估用于HfS2沉积的新型协调前体.
  • 为了研究MOCVD培养的HfS2膜的氧化路径和电性质.

主要方法:

  • 合成了两种新的协调前体:[Hf(TMSAEDMA) ((NMe2) 3) (1) 和[Hf ((TMSAEDMA) ((NEtMe) 3) (2) ].
  • 在中度,无H2S条件下使用MOCVD与前体1沉积HfS2薄膜.
  • 使用X射线光电子谱学 (XPS),扫描电子显微镜 (SEM),传输电子显微镜 (TEM) 和电导度测量进行表征.

主要成果:

  • 使用前体1的晶体HfS2的成功MOCVD生长.
  • 观察快速原生氧化到HfO2和HfOxSy,形成异构结构.
  • 在HfS2薄膜中与原生氧化物保持电导率,并在ZnS封闭后保持电导率.

结论:

  • 这项研究为高质量的HfS2.2建立了第一个MOCVD路线.
  • 前体1被认定为一种多功能工具,用于化物生长.
  • 这些发现强调了HfS2在先进的半导体应用中的潜力,这是由于其特性和氧化行为.