Synthesis and thermoelectric properties of polycarbazole, polyindolocarbazole, and polydiindolocarbazole derivatives
Synthesis and thermoelectric properties of polycarbazole, polyindolocarbazole, and polydiindolocarbazole derivatives
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DOI：
10.1021/cm070063h
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发表时间：
2007-04-17
影响因子：
8.6
通讯作者：
Tse, John S.
中科院分区：
文献类型：
--
作者：
Levesque, Isabelle;Bertrand, Pier-Olivier;Tse, John S.
在热电聚合物材料的探索中，合成了新型聚咔唑和聚吲哚并咔唑衍生物。引入了咔唑环上的烷基侧链和主链单元氮原子上的不同侧链（烷基或苯甲酰基）。研究了这些聚合物和两种聚二吲哚并咔唑的光学、电化学、电学和热电性能。能带结构计算被用来预测哪些聚合物可能是有前途的热电材料。塞贝克系数和电导率（功率因数）的最佳组合为约10（-7）W m（-1）K-2，其中共聚物包含噻吩单元与咔唑或吲哚并咔唑交替。这类聚合物具有良好的塞贝克系数，但仍需要提高电导率，以生产有用的热电材料。
In a quest for thermoelectric polymeric materials novel polycarbazole and polyindolocarbazole derivatives were synthesized. Alkyl side chains on the carbazole cycle and different side chains (alkyl or benzoyl) on the nitrogen atom of the backbone unit were introduced. Optical, electrochemical, electrical, and thermoelectric properties were investigated on these polymers and on two poly(diindolocarbazole)s. Band structure calculations were used to predict which polymers might be promising as thermoelectric materials. The best combination of Seebeck coefficient and conductivity (power factor) was around 10(-7) W m(-1) K-2 with copolymers comprising thiophene units alternating with carbazole or indolocarbazole. This family of polymers possesses good Seebeck coefficients, but there is still a need to improve the electrical conductivity, to produce useful thermoelectric materials.