碳点浓度对其与导电聚合物复合材料的电学和光学性能的影响。

Effect of Carbon Dots Concentration on Electrical and Optical Properties of Their Composites with a Conducting Polymer.

机构信息

Ioffe Institute, 26 Politekhnicheskaya, 194021 Saint Petersburg, Russia.

Faculty of Electronics, Saint Petersburg Electrotechnical University LETI, Ul. Professora Popova 5, 197022 Saint Petersburg, Russia.

出版信息

Molecules. 2022 Nov 18;27(22):8000. doi: 10.3390/molecules27228000.

DOI:10.3390/molecules27228000

PMID:36432101

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9699033/

Abstract

CQD/PEDOT: PSS composites were prepared via the hydrothermal method from glucose carbon quantum dots (CQDs) and an aqueous solution of PEDOT:PSS conducting polymer and their electrical and optical properties were investigated. The morphology and structure of these samples were investigated by AFM, SEM, EDX, and EBSD. It was found that the CQDs and CQD/PEDOT:PSS composites had a globular structure with globule sizes of ~50-300 nm depending on the concentration of PEDOT:PSS in these composites. The temperature dependence of the resistivity was obtained for the CQD/PEDOT:PSS (3%, 5%, 50%) composites, which had a weak activation character. The charge transport mechanism was discussed. The dependence of the resistivity on the storage time of the CQD/PEDOT:PSS (3%, 5%, 50%) composites and pure PEDOT:PSS was obtained. It was noted that mixing CQDs with PEDOT:PSS allowed us to obtain better electrical and optical properties than pure CQDs.

CQD/PEDOT: PSS (3%, 5%, 50%) composites are more conductive composites than pure CQDs, and the absorbance spectra of CQD/PEDOT:PSS composites are a synergistic effect of interaction between CQDs and PEDOT:PSS. We also note the better stability of the CQD/PEDOT:PSS (50%) composite than the pure PEDOT:PSS film.

CQD/PEDOT: PSS (50%) composite is promising for use as stable hole transport layers in devices of flexible organic electronics.

摘要

CQD/PEDOT: PSS 复合材料是通过水热法由葡萄糖碳量子点（CQD）和 PEDOT:PSS 导电聚合物的水溶液制备的，并研究了它们的电学和光学性质。这些样品的形貌和结构通过 AFM、SEM、EDX 和 EBSD 进行了研究。结果发现，CQD 和 CQD/PEDOT:PSS 复合材料具有球形结构，球粒大小取决于这些复合材料中 PEDOT:PSS 的浓度，约为 50-300nm。获得了 CQD/PEDOT:PSS（3%、5%、50%）复合材料的电阻率随温度的变化关系，其具有较弱的激活特性。讨论了电荷输运机制。获得了 CQD/PEDOT:PSS（3%、5%、50%）复合材料和纯 PEDOT:PSS 的电阻率随储存时间的变化关系。值得注意的是，将 CQDs 与 PEDOT:PSS 混合可以获得比纯 CQDs 更好的电学和光学性能。

与纯 CQDs 相比，CQD/PEDOT: PSS（3%、5%、50%）复合材料是更导电的复合材料，而 CQD/PEDOT:PSS 复合材料的吸收光谱是 CQDs 和 PEDOT:PSS 之间相互作用的协同效应。我们还注意到，与纯 PEDOT:PSS 薄膜相比，CQD/PEDOT:PSS（50%）复合材料具有更好的稳定性。

CQD/PEDOT: PSS（50%）复合材料有望作为柔性有机电子器件中稳定的空穴传输层使用。