Enhanced Thermoelectric Power Factor of Tensile Drawn Poly(3-hexylthiophene)
Enhanced Thermoelectric Power Factor of Tensile Drawn Poly(3-hexylthiophene)
复制标题
DOI：
10.1021/acsmacrolett.8b00820
复制
发表时间：
2019-01-01
影响因子：
7.015
通讯作者：
Mueller, Christian
中科院分区：
文献类型：
--
作者：
Hynynen, Jonna;Jarsvall, Emmy;Mueller, Christian
各种有机半导体的热电功率因数随其电导率的变化而变化，这是一种普遍遵循的功率定律，因此，允许这种经验趋势被超越的策略受到高度追捧。在这里，使用共轭聚合物聚（3-己基噻吩）（P3HT）的拉伸来创建具有高度单轴排列的独立薄膜。在取向方向上，三（二噻吩）钼配合物的顺序掺杂导致功率因数比预测值提高了5倍，达到16 μ W m(-1) K-2，电导率约为13 S cm（-1）。拉伸和掺杂都不会影响P3HT的玻璃化转变温度，从而产生坚固的独立材料，这是设计柔性热电器件的兴趣。
The thermoelectric power factor of a broad range of organic semiconductors scales with their electrical conductivity according to a widely obeyed power law, and therefore, strategies that permit this empirical trend to be surpassed are highly sought after. Here, tensile drawing of the conjugated polymer poly(3-hexylthiophene) (P3HT) is employed to create free-standing films with a high degree of uniaxial alignment. Along the direction of orientation, sequential doping with a molybdenum tris(dithiolene) complex leads to a 5-fold enhancement of the power factor beyond the predicted value, reaching up to 16 mu W m(-1) K-2 for a conductivity of about 13 S cm(-1). Neither stretching nor doping affect the glass transition temperature of P3HT, giving rise to robust free-standing materials that are of interest for the design of flexible thermoelectric devices.