在分子层面揭示PEDOT的兴奋剂影响:从几何到热电传输特性
Wen Shi1, Tianqi Zhao1, Jinyang Xi1
1MOE Key Laboratory of Organic OptoElectronics and Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, PR China.
Journal of the American Chemical Society
|September 26, 2015
概括
优化热电材料如聚3,4-乙烯二氧化 (PEDOT) 需要了解剂效应. 这项研究揭示了电离杂质散射占主导地位,轻度注PEDOT显示优异的热电特性.
科学领域:
- 材料科学
- 凝聚物质物理学
- 聚合物科学
背景情况:
- 化学剂通过调整载体度来优化热电材料.
- 补充剂对聚3,4-乙烯二氧化 (PEDOT) 中的电荷传输的确切影响尚不清楚.
- PEDOT是一种以其高功率而闻名的p型热电材料.
研究的目的:
- 阐明剂对PEDOT电荷传输和热电特性的影响.
- 研究PEDOT中的结构转变和兴奋剂水平之间的相互作用.
- 通过结合剂散射机制来建模热电性能.
主要方法:
- 电荷载体散射的理论建模,包括电离杂质和声波散射.
- 分析结构转换 (从芳香到类) 和半导体到金属的转换.
- 模型预测与移动性,Seebeck系数和功率因子的实验数据的比较.
主要成果:
- 从PEDOT转移到剂的情况接近统一.
- 在化PEDOT中,电离杂质散射被发现是声波波散射的主要机制.
- 该模型准确地复制了实验中的移动性,Seebeck系数和功率因子.
- 轻度注的PEDOT与强度注的样本相比显示出优异的热电特性.
- 在有序的PEDOT晶体中,热电传输被证明是高度异构的.
结论:
- 了解剂诱导的散射对于优化PEDOT的热电性能至关重要.
- 在PEDOT中,轻度兴奋剂比重度兴奋剂更有效.
- 在链式无形PEDOT纳米纤维中利用异构传输特性为先进的热电器件提供了有前途的策略.
相关概念视频
Electrical Transport
132
The electrical transport property of a material is defined by its resistance and conductivity. Resistance is the measure of a material's ability to resist the flow of electric current, while conductivity gauges its ability to allow the current to pass through, depending on the geometry of the measurement cell, such as electrode spacing and area. Conductivity is measured in Siemens (S). There are different types of conductance, including specific conductance, equivalent conductance, and molar...
132
Thermodynamic Potentials
1.8K
Thermodynamic potentials are state functions that are extremely useful in analyzing a thermodynamic system. They have dimensions of energy. The four important thermodynamic potentials are internal energy, enthalpy, Helmholtz free energy, and Gibbs free energy. These thermodynamic potentials can be expressed using two of the following variables: pressure, volume, temperature, and entropy. These two variables are expressed as the rate of change of the thermodynamic potential with respect to other...
1.8K
Debye–Huckel–Onsager Conductance Equation
214
The Debye-Hückel-Onsager equation is a cornerstone of physical chemistry, providing a method to determine the molar conductance (Λm) and molar conductance at infinite dilution (Λ°m) for uni-univalent electrolytes.Uni-univalent electrolytes are electrolytes that dissociate in solution to produce one cation with a +1 charge and one anion with a –1 charge per formula unit.This equation addresses two crucial phenomena: the asymmetry effect and the electrophoretic effect.
214
Carrier Transport
1.1K
The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
1.1K


