使用皇冠以太基单层电解质在WSe2的各种盐的电场效应晶体管上进行比斯塔式电转换
Huiran Wang1, Shubham Sukumar Awate1, Susan K Fullerton-Shirey1,2
1Department of Chemical and Petroleum Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh 15260, United States.
ACS applied engineering materials
|March 6, 2025
概括
这项研究证明了WSe2场效应晶体管中使用各种盐的皇冠以太电解质进行双可达的电开关. 甲酸 (LiClO4) 在兴奋剂密度,切换电压和状态保留方面表现最好,突出的是离子.
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:
- 在低功耗电子和内存设备中,可靠的电开关至关重要.
- 化 (WSe2) 场效应晶体管 (FET) 为此类应用提供了有前途的通道材料.
- 基于皇冠以太的电解质可以实现离子间隔和调节WSe2通道导电性.
研究的目的:
- 为了研究WSe2 FETs中的可双变电开关,使用一种基于皇冠的新型固态电解质.
- 评估不同 (Li+,Na+,Ca2+) 和离子 (ClO4-,Cl-) 对切换性能的影响.
- 为了确定最佳的盐成分,以实现高性能可比切换.
主要方法:
- 采用固态单层电解质构成的WSe2 FET的制造,该电解质由冠以太酸和化酸组成.
- 在不同的盐成分 (LiClO4,NaClO4,Ca(ClO4) 2,LiCl) 下测量设备的电气特性,以测量切换行为.
- 分析皇冠以太腔内的阴离子切换作为切换机制,并评估板密度,切换电压和状态保留.
主要成果:
- 用LiClO4,NaClO4和Ca(ClO4) 2实现了双位稳定切换,表明双位稳定性超越Li+扩展到Na+和Ca2+离子.
- LiClO4表现出最高的诱导板密度 (2 × 10^12 cm^-2),其次是Ca ((ClO4) 2 (1 × 10^12 cm^-2) 和NaClO4 (0.8 × 10^12 cm^-2).
- 与基盐相比,LiCl的电荷密度显著降低 (0.2 × 10^12 cm^-2),切换电压更高,状态保留较差,这表明离子的关键作用.
结论:
- 阴离子在使WSe2 FETs具有皇冠电解质的可比电切换中发挥着关键作用.
- (Li+) 被证明是最有效的子,产生更高的兴奋剂密度,更低的开关电压和更好的状态保留.
- 这项研究扩大了对离子介导切换的阴离子和离子影响的理解,为优化固态存储器件铺平了道路.
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