Scholarlink

<p>Ionic gating offers a highly reversible and precise means to modulate the thermoelectric (TE) properties of low-dimensional semiconductors. However, how the molecular structure of electrolytes affects the efficiency of such modulation remains poorly understood. In this work, we constructed organic electrochemical transistors (OECTs) based on single-walled carbon nanotubes (SWCNTs) to investigate thermoelectric modulation via ionic gating. Two imidazolium-based ionic liquids, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][TFSI]) and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][TFSI]), were employed to examine the influence of cation structure on electric double layer configuration and the resulting modulated effects on thermoelectric response of both the p- and n-type. Notably, the [BMIM][TFSI] system facilitated an earlier transition from p- to n-type conduction at relatively low gate voltages (VG), with the n-type region exhibiting strong TE responsiveness, indicating enhanced carrier tunability. Molecular dynamics (MD) simulations further revealed that variations in ionic liquid molecular structure influenced the electric double layer (EDL) strength, thereby affecting carrier transport characteristics. This study offers both experimental and theoretical insights into the structure–property relationship of ionic gating systems, and provides a viable strategy for designing high-performance, gate-tunable TE devices.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Alkyl chain length-engineered electric double layer for enhanced thermoelectric modulation in SWCNTs via ionic liquid gating

  • 期刊论文

  • 发表日期：

    2026年2月27日

查看全文
  • Jing Liu,
  • Xiaofang Liu,
  • Jinhua Xiong,
  • Rongri Tan,
  • Deping Wang,
  • Huakun Xing,
  • Cheng Liu,
  • Jingkun Xu,
  • Fengxing Jiang

摘要

Ionic gating offers a highly reversible and precise means to modulate the thermoelectric (TE) properties of low-dimensional semiconductors. However, how the molecular structure of electrolytes affects the efficiency of such modulation remains poorly understood. In this work, we constructed organic electrochemical transistors (OECTs) based on single-walled carbon nanotubes (SWCNTs) to investigate thermoelectric modulation via ionic gating. Two imidazolium-based ionic liquids, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][TFSI]) and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][TFSI]), were employed to examine the influence of cation structure on electric double layer configuration and the resulting modulated effects on thermoelectric response of both the p- and n-type. Notably, the [BMIM][TFSI] system facilitated an earlier transition from p- to n-type conduction at relatively low gate voltages (VG), with the n-type region exhibiting strong TE responsiveness, indicating enhanced carrier tunability. Molecular dynamics (MD) simulations further revealed that variations in ionic liquid molecular structure influenced the electric double layer (EDL) strength, thereby affecting carrier transport characteristics. This study offers both experimental and theoretical insights into the structure–property relationship of ionic gating systems, and provides a viable strategy for designing high-performance, gate-tunable TE devices.