一种具有低晶度的n型合聚合物,用于高性能有机热电材料
Yuexin Gao1, Yunzhe Ke2, Tianzuo Wang1
1School of Materials Science and Engineering and Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Key Laboratory of Organic Integrated Circuits, Ministry of Education, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P.R. China.
Angewandte Chemie (International ed. in English)
|March 7, 2024
概括
具有较低晶度的新合聚合物 (CPs) 对灵活的有机热电 (OTEs) 显示出前景. 本研究介绍了ThDPP-CNBTz,这是一种n型的CP,可以实现高兴奋剂效率和良好的热电性能,从而推进OTE设备的开发.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 能源转换 能源转换
背景情况:
- 具有低晶度的合聚合物 (CPs) 适合于柔性有机热电 (OTEs) 由于其无序结构,有助于耐兴奋剂和抗曲.
- N型CP通常显示热电性能差,限制了高性能热电发电机的开发.
研究的目的:
- 开发一种新的n型合聚合物,以提高柔性设备的热电性能.
- 研究聚合物结构,兴奋剂效率和热电特性之间的关系.
主要方法:
- 合成了一种新型n型CP,ThDPP-CNBTz,其中包括硫边缘的二基多罗和色功能化的西二醇受体单元.
- 聚合物的低晶度和低LUMO能量水平的特征.
- 在n-doping后评估热电性能,包括电导率和功率因子测量.
- 用溶液加工的柔性OTE设备的制造和测试.
主要成果:
- ThDPP-CNBTz 具有较低的晶度和较低的 LUMO 能量水平 (< -4.20 eV),促进了高的兴奋剂效率.
- 双接收器设计增强了极子移位,从而改善了热电特性.
- 使用N-的ThDPP-CNBTz实现了平均电导率为50.6S/cm,最大功率系数为126.8μW/mK2.2.
- 一个灵活的OTE设备显示最大功率系数为70μW/mK2,并在600个曲周期后保持性能.
结论:
- 新型n型CP,ThDPP-CNBTz,表现出卓越的热电性能和机械灵活性.
- 这项工作为开发高级OTE应用,特别是灵活电子的高性能n型CP提供了途径.
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