在单层MoS2中氧化硫空缺,用于增强型压电
Ajay Kumar Verma1,2,3,4, Md Ataur Rahman5, Pargam Vashishtha1,2,3,4
1School of Engineering, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3001, Australia.
ACS nano
|January 14, 2025
概括
我们通过通过氧气使硫空缺被动化,增强了二硫化 (MoS) 的压电性. 这种缺陷工程显著提高了自动供电电子产品的压电输出.
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:
- 现代应用需要通过压电进行高效的车载发电.
- 与散装相比,二维材料,如单层MoS,2具有增强的压电特性.
- 由于电荷选,MoS2中的硫空缺减少了压电输出.
研究的目的:
- 在现场证明MoS2中硫空缺的氧气被动化.
- 为了研究氧气被动化对压电性能的影响.
- 探索微型自动供电电子产品的应用.
主要方法:
- 在大气压条件下的化学蒸气沉积 (CVD).
- 在单层MoS2中存在硫空缺的现场氧气被动化.
- 压电系数和设备性能的表征.
主要成果:
- 实现了0.94 pm/V的外平面有效压电系数 (d33eff) 对氧被动的MoS2 (OP-MoS2),相比之下,0.54 pm/V的硫空 MoS2 (SV-MoS2).
- 基于OP-MoS2的压电器件 (PED) 显示出26%更高的输出电压 (0.95V峰值到峰值).
- OP-MoS2 PEDs比SV-MoS2 PEDs充电一个电容器的速度快30%.
结论:
- 在现场氧气被动化是一种有效的方法,通过减轻硫空缺效应来增强MoS中的压电性.
- 在MoS2中缺陷工程为开发高性能压电材料提供了一个可扩展的路线.
- 这一进步对下一代在各种受限制环境中使用自动供电电子产品和传感器充满希望.
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