皮拉зин侧面二基烯 (DPP):一种新型高性能n型有机热电材料的聚合物构件
Xinwen Yan1,2, Miao Xiong3,2, Jia-Tong Li1
1Department of Materials Science and Engineering, College of Engineering , Peking University , Beijing 100871 , China.
Journal of the American Chemical Society
|November 28, 2019
概括
新的pyrazine-flanked diketopyrrolopyrrole (PzDPP) 聚合物实现了对n型有机热电材料的创纪录的高电导率和功率系数. 这一突破增强了有机材料在热电应用中的潜力.
科学领域:
- 有机电子产品
- 材料科学
- 能源转换
背景情况:
- 合聚合物通常具有较差的导电性和热电性能.
- 这限制了它们在n型有机热电器件中的使用.
研究的目的:
- 开发一种新的二甲基烯基烯基 (DPP) 衍生物,即带有激素的DPP (PzDPP),具有深度的LUMO水平.
- 合成和表征一种基于PzDPP增强的热电性质的供体-受体共聚物,P(PzDPP-CT2).
主要方法:
- 合成一种新的PzDPP衍生物和一种PzDPP-CT2共聚物.
- 聚合物的电子特性,包括LUMO水平和链间相互作用 (π-π堆积距离).
- 使用N-DMBI并测量电导率和功率因子.
主要成果:
- P(PzDPP-CT2) 具有深度的LUMO能量水平和强烈的链间相互作用, π-π堆叠距离为3.38 Å.
- 获得了高电导率 (高达8.4 S cm−1) 和功率系数 (高达57.3 μW m−2 K−2).
- 这些性能指标超过了之前报告的n-doped DPP聚合物,并且在可溶液处理的n-doped合聚合物中最高.
结论:
- PzDPP是高性能n型有机热电材料的一个有前途的组成部分.
- 通过仔细的分子工程,在不影响链间相互作用的情况下,可以在合聚合物中实现高效的n-doping.
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