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Key parameters for enhancing the thermoelectric power factor of PEDOT:PSS/PANI-CSA multilayer thin films

机译：增强PEDOT热电系数的关键参数：PSS / PANI-CSA多层薄膜

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Among the conducting polymers, poly(3,4-ethylene dioxythiophene):polystyrene sulfonate (PEDOT:PSS) has been extensively investigated for organic thermoelectric device applications owing to its high electrical conductivity (sigma), flexibility and easy processability. The thermoelectric (TE) power factor - a factor that determines the efficiency of a thermoelectric material, is very critical in developing high-efficiency thermoelectric devices. The TE power factor of PEDOT:PSS requires further enhancement in realizing efficient organic TE devices. Recently, we have reported a layer-by-layer deposition technique to deposit PEDOT:PSS and poly aniline-camphor sulfonic acid (PANI-CSA) forming a PEDOT:PSS/PANI-CSA multilayer (ML) thin film structure with an enhanced thermoelectric power factor up to 49 W m(-1) K-1. However, there exist several ambiguities regarding the parameters that control the TE power factor in (ML) thin films. In order to identify the parameters that control the TE power factor of ML thin films, PEDOT:PSS/PANI-CSA ML thin films have been deposited by varying the deposition conditions such as spin speed, the number of layers, solvent treatment, and thickness of each layer. A thermoelectric power factor up to 325 W m(-1) K-1 is achieved by properly optimizing the spin speed, number of layers, and the thickness of each layer in ML thin films. The enhanced thermoelectric power factor is the result of multiple factors such as stretching of PEDOT chains, structural conformation change from benzoid to quinoid, and excess PSS removal from the top of the PEDOT:PSS layer through solvent treatment and at the PEDOT:PSS/PANI-CSA interface. Our study provides the basis for realizing an enhanced thermoelectric power factor of organic thermoelectric multilayer structures consisting of ultra-thin polymer thin films similar to inorganic superlattices having 2D confinement.
机译：在导电聚合物中，由于其高导电性（Sigma），灵活性和易于加工性，已经广泛研究了聚苯乙烯磺酸盐（PEDOT：PSS），用于有机热电装置应用。热电（TE）功率因数 - 确定热电材料效率的因素在开发高效热电装置方面非常关键。 PEDOT的TE功率因数：PSS在实现有效的有机TE器件方面需要进一步增强。最近，我们报告了一种逐层沉积技术，用于存放PEDOT：PS和聚苯胺 - 樟脑磺酸（PANI-CSA），形成PEDOT：PSS / PANI-CSA多层（ML）薄膜结构，具有增强的热电功率因数高达49 W m（-1）k-1。然而，有几个关于控制（ML）薄膜中的参数的含量歧义。为了识别控制M1薄膜TE功率因数的参数，通过改变沉积条件，诸如旋转速度，层数，溶剂处理和厚度，沉积PEDOT：PSS / PANI-CSA ML薄膜每层。通过适当优化旋转速度，层数和ML薄膜中的每层的每层的厚度来实现高达325Wm（-1）k-1的热电功率因数。增强的热电功率因数是多个因素的结果，例如佩特链的拉伸，从毒素到奎单的结构构象变化，并且从腐蚀剂的顶部和PSS层的顶部去除PSS，在溶剂处理和PEDOT：PSS / PANI -csa接口。我们的研究提供了实现具有类似于具有2D限制的无机超晶片的超薄聚合物薄膜组成的有机热电多层结构的增强的热电功率系数的基础。

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  • 来源
    《RSC Advances》 |2019年第21期|共7页
  • 作者

    Lee Hyung Myung; Anoop Gopinathan; Lee Hye Jeong; Kim Wan Sik; Jo Ji Young;

  • 作者单位

    Gwangju Inst Sci &

    Technol Sch Mat Sci &

    Engn Gwangju 61005 South Korea;

    Gwangju Inst Sci &

    Technol Sch Mat Sci &

    Engn Gwangju 61005 South Korea;

    Gwangju Inst Sci &

    Technol Sch Mat Sci &

    Engn Gwangju 61005 South Korea;

    Gwangju Inst Sci &

    Technol Sch Mat Sci &

    Engn Gwangju 61005 South Korea;

    Gwangju Inst Sci &

    Technol Sch Mat Sci &

    Engn Gwangju 61005 South Korea;

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  • 中图分类 化学;
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