混合溶剂基离子液体两步后处理提高了PEDOT:PSS薄膜的热电性能

IF 2.7 4区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Organic Electronics Pub Date : 2025-06-26 DOI:10.1016/j.orgel.2025.107289

Zhao Nan , Yabo Xu , Jingshuang Ma , Yanfang Wang , Yaowei Han , Mengna Wang , Bo Zhao , Hua Wang

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引用次数: 0

摘要

热电（TE）材料和发电机可以通过温度梯度直接将热能转化为电能，解决废热污染和能源危机。本研究采用硫酸（H2SO4）和新型硼氢化钠（NaBH4）和1-乙基-3-甲基咪唑双氰胺（EMIM-DCA）混合溶剂对PEDOT:PSS薄膜进行两步后处理。H2SO4和EMIM-DCA可以通过去除绝缘PSS来提高PEDOT的电导率，并诱导PEDOT链的苯类到类醌的构象转变。NaBH4作为还原剂可以将PEDOT的偶极子还原为极性或中性单体，从而实现塞贝克系数的提高。第二步后处理采用NaBH4+ emem - dca混合溶剂，在保持较高电导率的同时提高了Seebeck系数，室温下最高功率因数为95.1 μW/m·K2（电导率为1214.3 S/cm， Seebeck系数为28.0 μV/K），是迄今为止采用混合溶剂后处理的最佳结果之一。制备并实现了在ΔT温度为30 K时最高输出电压为5.77 mV，最高输出功率为23.43 nW的6支TE发电机，在自供电可穿戴电子产品中具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhanced thermoelectric performance of PEDOT:PSS film by two-step post-treatment with mixed solvent based ionic liquid

查看原文本刊更多论文

Enhanced thermoelectric performance of PEDOT:PSS film by two-step post-treatment with mixed solvent based ionic liquid

Thermoelectric (TE) materials and generators can convert thermal energy into electrical energy directly through temperature gradients to solve the pollution of waste heat and the energy crisis. Here, we adopted a two-step post-treatment of PEDOT:PSS films by sulfuric acid (H₂SO₄) and the new mixed solvent consisting of sodium borohydride (NaBH₄) and 1-ethyl-3-methylimidazolyl dicyandiamide (EMIM-DCA). H₂SO₄ and EMIM-DCA can enhance electrical conductivity by removing the insulating PSS and induce benzenoid-to-quinoid conformational transformation of the PEDOT chains. NaBH₄ as a reducing agent can reduce the dipolaritons of PEDOT to polaritons or neutral monomers, which can achieve an increase of the Seebeck coefficient. The second step post-treatment using mixed solvent of NaBH₄+EMIM-DCA increased the Seebeck coefficient while maintaining a high level of electrical conductivity, generating the highest power factor of 95.1 μW/m·K² (electrical conductivity of 1214.3 S/cm and Seebeck coefficient of 28.0 μV/K) at room temperature, which was one of the best results with mixed solvent post-treatment up to now. Besides, a 6-legs TE generator was prepared and achieved with the highest output voltage of 5.77 mV and highest output power of 23.43 nW under the ΔT of 30 K, which represented great prospects for the application in self-powered wearable electronics.

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来源期刊

Organic Electronics 工程技术-材料科学：综合

CiteScore

6.60

自引率

6.20%

发文量

238

审稿时长

44 days

期刊介绍： Organic Electronics is a journal whose primary interdisciplinary focus is on materials and phenomena related to organic devices such as light emitting diodes, thin film transistors, photovoltaic cells, sensors, memories, etc. Papers suitable for publication in this journal cover such topics as photoconductive and electronic properties of organic materials, thin film structures and characterization in the context of organic devices, charge and exciton transport, organic electronic and optoelectronic devices.