Liang Ansheng, Zhou Xiaoyan, Zhou Wenqiao, Wan Tao, Wang Luhai, Pan Chengjun, Wang Lei
Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China.
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China.
Macromol Rapid Commun. 2017 Sep;38(18). doi: 10.1002/marc.201600817. Epub 2017 May 24.
Three conjugated polymers with alkyl chains of different lengths are designed and synthesized, and their structure-property relationship as organic thermoelectric materials is systematically elucidated. All three polymers show similar photophysical properties, thermal properties, and mechanical properties; however, their thermoelectric performance is influenced by the length of their side chains. The length of the alkyl chain significantly influences the electrical conductivity of the conjugated polymers, and polymers with a short alkyl chain exhibit better conductivity than those with a long alkyl chain. The length of the alkyl chain has little effect on the Seebeck coefficient. Only a slight increase in the Seebeck coefficient is observed with the increasing length of the alkyl chain. The purpose of this study is to provide comprehensive insight into fine-tuning the thermoelectric properties of conjugated polymers as a function of side-chain engineering, thereby providing a novel perspective into the design of high-performance thermoelectric conjugated polymers.
设计并合成了三种具有不同长度烷基链的共轭聚合物，并系统地阐明了它们作为有机热电材料的结构-性能关系。所有这三种聚合物都表现出相似的光物理性质、热性质和机械性质；然而，它们的热电性能受其侧链长度的影响。烷基链的长度显著影响共轭聚合物的电导率，并且具有短烷基链的聚合物比具有长烷基链的聚合物表现出更好的导电性。烷基链的长度对塞贝克系数影响很小。仅观察到随着烷基链长度的增加，塞贝克系数略有增加。本研究的目的是全面深入了解如何根据侧链工程对共轭聚合物的热电性质进行微调，从而为高性能热电共轭聚合物的设计提供新的视角。
