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在以离子液体为基础的石墨烯热发射调节器中的互干/脱动力学

Mehedi Hasan Himel¹, Zhi Cai², Ehsan Shamsi³

¹Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, United States.

|July 10, 2025

概括

多层石墨烯装置中的离子液体间隙改变了热发射率. 较高的温度增强了间隔,将热发射率提高到25.5°C,这对于可调节的电子材料至关重要.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
凝聚物质物理学凝聚物质物理学

背景情况:

离子液体可以插入到多层石墨烯 (MLG).
这种间隔调节了MLG的热发射率和介电性质.
电化学控制提供了一个调整这些属性的途径.

研究的目的:

在MLG设备中研究电化学驱动的离子液体干的温度依赖性行为.
量化温度对介质程度和由此产生的热发射率变化的影响.
探索这些设备的操作温度极限和影响因素.

主要方法:

用离子液体 ([DEME+][TFSI-]) 和铜电极制造的MLG设备.
使用3.5-4V的电压进行电化学间接.
拉曼光谱法用于监测从10-100°C的间隙.
热成像用于测量温度变化 (7.5-14微米波长).

主要成果:

在MLG中[TFSI-]离子的间隙变化随着温度 (10-100°C) 的增加而改善.
由于介质的明显温度变化随着温度的增加而增加,最高达到25.5°C.
互会导致自由载体度发生两级变化,从而改变复杂的介电函数.
较高的温度会增强间隔,但不会显著影响切断频率.

结论:

温度显著影响MLG设备中离子液体的电化学间隙.
观察到的热发射率变化与载体密度调制直接相关.
设备性能,包括间隔度和有效温度范围,由于离子移动性和扩散动力学,取决于环境温度.

关键词:

电解质门的封闭方式石墨烯光电子学光电子学离子介质的离子介质.多层石墨烯多层石墨烯变量的排放率变量.

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