<br>用于一体化光热电转换的超柔性 PEDOT:PSS/螺旋碳纳米管薄膜,ACS Applied Materials & Interfaces

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用于一体化光热电转换的超柔性 PEDOT:PSS/螺旋碳纳米管薄膜
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-05-31 , DOI: 10.1021/acsami.2c05875
Xin-Zheng Jin ₁ , Huan Li ₁ , Ying Wang ₁ , Zhen-Yu Yang ₁ , Xiao-Dong Qi ₁ , Jing-Hui Yang ₁ , Yong Wang ₁

Affiliation

光热电（PTE）转换可以高效地实现低质量光或热的回收。无机异构异步（分离）PTE 转换系统的开发已投入大量精力。在这里，根据同质同步（一体化）PTE 转换假说，通过连续滴铸 PEDOT:PSS/螺旋碳纳米管 (HCNT) 混合物和 PEDOT 制备了具有伪双层结构 (PBA) 的全有机 PTE 薄膜。：PSS 到真空紫外线处理的基材上。我们的结果证明，HCNT 中嵌入的七边形-五边形对促进了 PEDOT 分子链的更致密排列，从而提高了结晶度并影响热电性能。 HCNTs的弱连接和中空结构抑制了热量的散发，薄膜的zT值达到0.01以上。 PBA薄膜表现出比纯PEDOT:PSS薄膜更好的光热转换性能，并且无需外部冷却即可稳定产生超过25.68°C的温差。制作了柔性PTE芯片演示，其理想开路电压（通过COMSOL模拟）在弱NIR刺激（83.12 mW/cm ² ）下达到1.5 mV以上，这是有机全输入的最佳值- 一个PTE器件，实际最大输出功率达到2.55 nW（166.01 mW/cm ² ）。该芯片具有令人难以置信的超柔韧性，在10000次弯曲循环后其内阻变化小于1.42%，并在连续周期输出中表现出超高的稳定性（相似性>90%）。我们的工作填补了PEDOT:PSS复合材料同质同步PTE研究的空白，是超灵活集成一体化PTE芯片设计的初步尝试。

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Ultraflexible PEDOT:PSS/Helical Carbon Nanotubes Film for All-in-One Photothermoelectric Conversion

Photothermoelectric (PTE) conversion can achieve the recovery of low-quality light or heat efficiently. Much effort has been devoted to the exploitation of the inorganic heterogeneous asynchronous (separate) PTE conversion system. Here, a full organic PTE film with a pseudobilayer architecture (PBA) according to the homogeneous synchronous (all-in-one) PTE conversion hypothesis was prepared via successive drop-casting a PEDOT:PSS/helical carbon nanotube (HCNT) mixture and PEDOT:PSS onto a vacuum ultraviolet treated substrate. Our results prove that the heptagon–pentagon pairs embedded in HCNTs promote a denser arrangement of the molecular chains of PEDOT, which enhances the crystallinity and affects the thermoelectric properties. The weak connection and hollow structure of HCNTs inhibit the dissipation of heat, and the zT value of the film reaches over 0.01. The PBA film shows better photothermal conversion performance than a neat PEDOT:PSS film and stably generates a temperature difference of over 25.68 °C without external cooling. A flexible PTE chip demo was manufactured, and the ideal open-circuit voltage (simulated via COMSOL) of that reaches over 1.5 mV under weak NIR stimulation (83.12 mW/cm²), which is the best value reported for an organic all-in-one PTE device, and the real maximum output power reaches 2.55 nW (166.01 mW/cm²). The chip has incredible ultraflexibility, and its inner resistance changes less than 1.42% after 10000 bending cycles and displays ultrahigh stability (similarity >90%) in a continuous periodic output. Our work fills the deficit of homogeneous synchronous PTE research for a PEDOT:PSS composite and is a preliminary attempt in an ultraflexible integrated all-in-one PTE chip design.

更新日期：2022-05-31

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