Enhancing the thermoelectric properties of PEDOT:PSS films through the incorporation of g-C3N4 nanosheets and carbon nanotubes

IF 6.5 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composites Communications Pub Date : 2024-09-19 DOI:10.1016/j.coco.2024.102092
Manoj Singh, Neeraj Khare
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Abstract

Present study focuses on the synthesis of flexible nanocomposite film made of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS), graphitic carbon nitride (g-C3N4) nanosheets, and carbon nanotubes (CNTs) and how the g-C3N4 nanosheets and CNTs affect the thermoelectric properties of PEDOT:PSS. Incorporating 10 wt% of g-C3N4 nanosheets to PEDOT:PSS improved the Seebeck coefficient to 74.3 μVK−1, ∼5 times higher than the PEDOT:PSS film. However, this led to a decrease in electrical conductivity, limiting the power factor to 335.4 μWm−1K−2. In order to address this, CNTs were added as conductive fillers. The resulting PEDOT:PSS composite, with 10 wt% of g-C3N4 and 10 wt% CNTs, showed a significant power factor of 589.8 μWm−1K−2, an electrical conductivity of 810.6 Scm−1, and a Seebeck coefficient of 84.5 μVK−1, indicating a substantial improvement in the thermoelectric performance of pristine PEDOT:PSS. The increased Seebeck coefficient in the PEDOT:PSS and g-C3N4 composite is due to reduced carrier concentration and energy filtering at the interfaces. The enhancement in electrical conductivity and the Seebeck coefficient after adding CNTs is attributed to the formation of conductive networks, increased mobility, and energy filtering at the interfaces between PEDOT:PSS and CNTs. The study suggests that combining g-C3N4 nanosheets and CNTs with PEDOT:PSS could enhance the thermoelectric performance of PEDOT:PSS-based materials.
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通过加入 g-C3N4 纳米片和碳纳米管增强 PEDOT:PSS 薄膜的热电特性
本研究的重点是聚(3,4-亚乙二氧基噻吩)-聚(苯乙烯磺酸)(PEDOT:PSS)、氮化石墨碳(g-C3N4)纳米片和碳纳米管(CNTs)柔性纳米复合薄膜的合成,以及 g-C3N4 纳米片和 CNTs 如何影响 PEDOT:PSS 的热电性能。在 PEDOT:PSS 中加入 10 wt% 的 g-C3N4 纳米片,可将塞贝克系数提高到 74.3 μVK-1,是 PEDOT:PSS 薄膜的 5 倍。然而,这导致导电率下降,将功率因数限制在 335.4 μWm-1K-2。为了解决这个问题,我们添加了 CNT 作为导电填料。结果显示,含有 10 wt% g-C3N4 和 10 wt% CNT 的 PEDOT:PSS 复合材料的功率因数达到了 589.8 μWm-1K-2,电导率为 810.6 Scm-1,塞贝克系数为 84.5 μVK-1,表明原始 PEDOT:PSS 的热电性能有了大幅提高。PEDOT:PSS 和 g-C3N4 复合材料中塞贝克系数的增加是由于载流子浓度的降低和界面处的能量过滤。加入碳纳米管后,导电性和塞贝克系数的提高归因于导电网络的形成、迁移率的提高以及 PEDOT:PSS 和碳纳米管界面处的能量过滤。研究表明,将 g-C3N4 纳米片和 CNT 与 PEDOT:PSS 结合使用可提高基于 PEDOT:PSS 材料的热电性能。
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来源期刊
Composites Communications
Composites Communications Materials Science-Ceramics and Composites
CiteScore
12.10
自引率
10.00%
发文量
340
审稿时长
36 days
期刊介绍: Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.
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