四级,分层,二维石灰化物,Mo1-xWxSSe:厚度取决于运输特性
Rajat Kumar1, Ramesh Naidu Jenjeti1, Kiran Vankayala2
1Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India.
Nanotechnology
|October 10, 2023
概括
高度定向的MoxW1-xS2ySe2(1-y)晶体表现出基于片厚度的可调节电子特性. 这项研究突出了它们对先进电子和光电子设备的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 四次性合金石化素具有可调节的电子特性.
- 控制晶体结构和组成是新型电子应用的关键.
研究的目的:
- 合成高度定向的单晶四元合金MoxW1-xS2ySe2(1-y) .
- 研究Mo0.5W0.5SSe片的厚度依赖的运输特性.
- 评估它们对电子和光电子设备的潜力.
主要方法:
- 高温化学蒸汽传输 (CVT) 用于晶体合成.
- 制造具有底门配置的场效应晶体管 (FET).
- 在广泛的温度范围内进行电气表征,包括输电线模型 (TLM) 测量.
主要成果:
- FET的特征是厚度可调节的:薄片 (1-4层) 的n型,较厚片 (>90层) 的双极.
- 电子的最大移动性为63 ± 4厘米2V-1s-1 (9层),孔的移动性为10.3 ± 0.4厘米2V-1s-1 (94层).
- 实现了高开/关比:电子>108,孔高达104.
结论:
- Mo0.5W0.5SSe四元合金表现出可调节的电子行为与片厚度.
- 取决于厚度的带隙调制影响了电荷载体运输.
- 这些材料是各种电子和光电子应用的有希望的候选材料.
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