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Enhanced Thermoelectric Performance of a Donor–Acceptor-Based Two-Dimensional Conjugated Polymer with High Crystallinity
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-04-22 , DOI: 10.1021/acsaem.1c00274 Benzhang Li 1, 2 , Xinxin Li 2 , Fan Yang 3 , Yujun Chen 1 , Xianhua Mao 1 , Shuxun Wan 2 , Hong Xin 1 , Sitong Yan 1 , Mingliang Wang 1 , Chunmei Gao 1 , Lei Wang 2
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-04-22 , DOI: 10.1021/acsaem.1c00274 Benzhang Li 1, 2 , Xinxin Li 2 , Fan Yang 3 , Yujun Chen 1 , Xianhua Mao 1 , Shuxun Wan 2 , Hong Xin 1 , Sitong Yan 1 , Mingliang Wang 1 , Chunmei Gao 1 , Lei Wang 2
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Introducing two-dimensional (2D) conjugated structures to polymers is a feasible way for the design of functionalized polymers due to their good planarity, high electron/hole mobility, thermal stabilities, and so forth. However, the current development of thermoelectric polymers is mainly restricted to the limited modification of the one-dimensional conjugated polymers. Herein, a novel donor–acceptor based 2D conjugated polymer, P(BDTTT-DPP), was designed and synthesized for the enhancement of thermoelectric properties. Compared to the one-dimensional conjugated polymer P(BDT-DPP), P(BDTTT-DPP) showed a higher doping level when doped with the p-type FeCl3 dopant. After doping with 20 mg/mL FeCl3 for 15 min, the optimal power factor of P(BDTTT-DPP) was obtained to be 6.50 μW m–1 K–2 at room temperature, which is 26 times higher than that of P(BDT-DPP). The studies of film morphology and packing structure analysis further indicated that the π–π stacking (010) distance of P(BDTTT-DPP) was maintained after the doping process, and the longer lamellar stacking distance allowed the FeCl3 dopants to efficiently incorporate between the lamellar domains compared to that of P(BDT-DPP), which is favorable to the crystallinity and electron transferability. The results of our work provide valuable insights into the development of donor–acceptor based 2D conjugated polymer for high-performance organic thermoelectric materials.
中文翻译：
具有高结晶度的基于供体-受体的二维共轭聚合物的增强的热电性能
将二维（2D）共轭结构引入聚合物是一种设计功能化聚合物的可行方法，因为它们具有良好的平面性，高的电子/空穴迁移率，热稳定性等。然而，热电聚合物的当前发展主要限于一维共轭聚合物的有限改性。在此，设计并合成了一种新型的基于供体-受体的二维共轭聚合物P（BDTTT-DPP），以增强热电性能。与一维共轭聚合物P（BDT-DPP）相比，P（BDTTT-DPP）掺杂p型FeCl 3掺杂剂时显示出更高的掺杂水平。用20 mg / mL FeCl 3掺杂15分钟后，P（BDTTT-DPP）的最佳功率因数为6.50μWm室温下为–1 K –2，比P（BDT-DPP）高26倍。薄膜形貌和堆积结构分析的研究进一步表明，掺杂后P（BDTTT-DPP）的π-π堆积（010）距离得以保持，且较长的层状堆积距离使FeCl 3掺杂剂能够有效地掺入与P（BDT-DPP）相比，其层状结构域有利于结晶性和电子转移性。我们的工作结果为开发基于供体-受体的2D共轭聚合物用于高性能有机热电材料提供了宝贵的见识。
更新日期：2021-05-24
中文翻译：
具有高结晶度的基于供体-受体的二维共轭聚合物的增强的热电性能
将二维（2D）共轭结构引入聚合物是一种设计功能化聚合物的可行方法，因为它们具有良好的平面性，高的电子/空穴迁移率，热稳定性等。然而，热电聚合物的当前发展主要限于一维共轭聚合物的有限改性。在此，设计并合成了一种新型的基于供体-受体的二维共轭聚合物P（BDTTT-DPP），以增强热电性能。与一维共轭聚合物P（BDT-DPP）相比，P（BDTTT-DPP）掺杂p型FeCl 3掺杂剂时显示出更高的掺杂水平。用20 mg / mL FeCl 3掺杂15分钟后，P（BDTTT-DPP）的最佳功率因数为6.50μWm室温下为–1 K –2，比P（BDT-DPP）高26倍。薄膜形貌和堆积结构分析的研究进一步表明，掺杂后P（BDTTT-DPP）的π-π堆积（010）距离得以保持，且较长的层状堆积距离使FeCl 3掺杂剂能够有效地掺入与P（BDT-DPP）相比，其层状结构域有利于结晶性和电子转移性。我们的工作结果为开发基于供体-受体的2D共轭聚合物用于高性能有机热电材料提供了宝贵的见识。
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