Preparation of high-performance Ag2Se NWs/PEDOT:PSS composite films and influence of PEDOT:PSS content on thermoelectric properties

IF 3.4 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Mechanical and Materials Engineering Pub Date : 2025-02-26 DOI:10.1186/s40712-025-00235-6

Ruoxi Wang, Rongke Sun, Yanmei Ren, Yanqing Ma, Lei Ma

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Abstract

There is still limited research on the influence of polymer content in inorganic/organic materials on thermoelectric properties. In this study, we systematically investigated the influence of the content of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) in the Ag₂Se nanowires/PEDOT:PSS (Ag₂Se NWs/PEDOT:PSS) composite films on the thermoelectric properties. When the content of PEDOT:PSS is 1.54 wt%, the composite film achieved the highest power factor (PF) of ~ 2074.0 µW m⁻¹ K⁻² at room temperature. The maximum output power (P_max) of the single-leg thermoelectric device based on the composite film is approximately 49.42 nW, and the maximum power density (PD_max) is 4.28 W m⁻² at a temperature difference of 25 K. Furthermore, the film exhibits superior flexibility with 94.3% of the original performance retention after 2000 bending cycles around a rod with a diameter of 5 mm. This work provides valuable guidance for the design and fabrication of high-performance flexible inorganic/organic composite thermoelectric materials.

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关于无机/有机材料中聚合物含量对热电特性影响的研究还很有限。本研究系统研究了 Ag2Se 纳米线/PEDOT:PSS（Ag2Se NWs/PEDOT:PSS）复合薄膜中聚（3,4-亚乙二氧基噻吩）：聚（苯乙烯磺酸）（PEDOT:PSS）含量对热电性能的影响。当 PEDOT:PSS 的含量为 1.54 wt% 时，复合薄膜在室温下的最高功率因数（PF）达到 ~ 2074.0 µW m-1 K-2。此外，该薄膜还具有优异的柔韧性，在围绕直径为 5 mm 的杆弯曲 2000 次后，其原始性能保持率为 94.3%。这项研究为设计和制造高性能柔性无机/有机复合热电材料提供了宝贵的指导。

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