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Complementary n-Type and p-Type Graphene Films for High Power Factor Thermoelectric Generators

机译：用于高功率因数热电发电机的互补n型和p型石墨烯薄膜

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摘要

Solution-phase exfoliated graphene has always been an attractive material for flexible thermoelectric applications, but traditional oxidative routes suffer from poor flake quality and a lack of quality doping techniques to make complementary n-type and p-type films. Here, it is demonstrated that by changing the adsorbed surfactant during the intercalation-exfoliation process (polyvinylpyrrolidone for n-type, pyrenebutyric acid for p-type), both extremely high electrical conductivity (3010 and 2330 S cm(-1)) and high Seebeck coefficients (53.1 and -45.5 mu V K-1) can be achieved. The result is that both of these films show remarkable power factors, over 600 mu W m(-1) K-2 at room temperature, which is over an order of magnitude better than that in previous works demonstrating complementary n-type and p-type graphene thermoelectric films. Based on these films, a full all-graphene thermoelectric device is constructed as a proof of concept, where a peak power of 5.0 nW is recorded at a temperature difference of 50 K.
机译：溶液相剥离石墨烯一直是一种有吸引力的热电应用材料，但传统的氧化途径遭受薄片质量差和缺乏质量掺杂技术，以使互补的n型和p型膜。这里，证明通过在插入剥离过程中改变吸附的表面活性剂（用于N型的聚乙烯吡咯烷酮，P型芘丁酸），极高的导电性（3010和2330 S cm（-1））和高可以实现Seebeck系数（53.1和-45.5μmVk-1）。结果表明，这两种薄膜在室温下显示出显着的功率因子，超过600μm（-1）k-2，比以前的作品中的额定数量更好地显示互补的n型和p-型石墨烯热电薄膜。基于这些薄膜，全全石墨烯热电装置构造成概念证据，其中5.0nW的峰值功率在50k的温差下记录。

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  • 来源
    《Advanced Functional Materials》 |2020年第28期|2001760.1-2001760.7|共7页
  • 作者

    Novak Travis G.; Kim Jin; Kim Jungmo; Tiwari Anand P.; Shin Hosun; Song Jae Yong; Jeon Seokwoo;

  • 作者单位

    Korea Adv Inst Sci & Technol Dept Mat Sci & Engn KAIST Inst Nanocentury Adv Battery Ctr Taejon 305701 South Korea;

    Korea Adv Inst Sci & Technol Dept Mat Sci & Engn KAIST Inst Nanocentury Adv Battery Ctr Taejon 305701 South Korea;

    Korea Adv Inst Sci & Technol Dept Mat Sci & Engn KAIST Inst Nanocentury Adv Battery Ctr Taejon 305701 South Korea;

    Korea Adv Inst Sci & Technol Dept Mat Sci & Engn KAIST Inst Nanocentury Adv Battery Ctr Taejon 305701 South Korea;

    Korea Res Inst Stand & Sci KRISS Yuseong 305340 Daejeon South Korea;

    Korea Res Inst Stand & Sci KRISS Yuseong 305340 Daejeon South Korea;

    Korea Adv Inst Sci & Technol Dept Mat Sci & Engn KAIST Inst Nanocentury Adv Battery Ctr Taejon 305701 South Korea;

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  • 正文语种 eng
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  • 关键词

    flexible; graphene; power factor; thermoelectric; waste heat;

    机译：柔性;石墨烯;功率因数;热电;浪费热量;

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