The Role of Ordering on the Thermoelectric Properties of Blends of Regioregular and Regiorandom Poly(3‐hexylthiophene)
The Role of Ordering on the Thermoelectric Properties of Blends of Regioregular and Regiorandom Poly(3‐hexylthiophene)
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DOI：
10.1002/aelm.201800915
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发表时间：
2019-04
影响因子：
6.2
通讯作者：
E. Lim;A. Glaudell;Rachel Miller;M. Chabinyc
中科院分区：
文献类型：
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作者：
E. Lim;A. Glaudell;Rachel Miller;M. Chabinyc
半导体聚合物的热电性能受到载流子浓度和设置电荷传输路径的形态的影响。结合光学、形态学和电学表征来评估无序对掺杂有2，3，5，6-四氟-7，7，8，8-四氰基醌二甲烷（F4 TCNQ）的聚（3-己基噻吩）（P3 HT）薄膜的热电性质的作用。通过浇铸区域规则（RR-P3 HT）和区域无规（RRa-P3 HT）的共混物，然后从气相用F4 TCNQ掺杂，形成受控的形态。光学光谱和X射线散射表明，气相掺杂在薄膜的无序区域中诱导有序，并增加了薄膜的长程连接性。热电性能作为组成的函数进行评估，结果表明，虽然塞贝克系数受到结构有序的影响，但电导率和功率因数与有序域的长程连接性更密切相关。
The thermoelectric properties of semiconducting polymers are influenced by both the carrier concentration and the morphology that sets the pathways for charge transport. A combination of optical, morphological, and electrical characterization is used to assess the effect of the role of disorder on the thermoelectric properties of thin films of poly(3‐hexylthiophene) (P3HT) doped with 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane (F4TCNQ). Controlled morphologies are formed by casting blends of regioregular (RR‐P3HT) and regiorandom (RRa‐P3HT) and then subsequently doped with F4TCNQ from the vapor phase. Optical spectroscopy and X‐ray scattering show that vapor phase doping induces order in the disordered regions of thin films and increases the long‐range connectivity of the film. The thermoelectric properties are assessed as a function of composition and it is shown that while the Seebeck coefficient is affected by structural ordering, the electrical conductivity and power factor are more strongly correlated with the long‐range connectivity of ordered domains.