Nanomaterials Research Institute, Department of Materials and Chemistry, National Institute of Advanced Industrial Science and Technology , 1-2-1 Namiki, Tsukuba, Ibaraki 305-8564, Japan.
Nanoelectronics Research Institute, Department of Electronics and Manufacturing, National Institute of Advanced Industrial Science and Technology , Higashi 1-1-1, Tsukuba, Ibaraki 305-8562, Japan.
ACS Appl Mater Interfaces. 2016 Jan 27;8(3):2054-60. doi: 10.1021/acsami.5b10453. Epub 2016 Jan 15.
Exploring the various applications of conjugated polymers requires systematic studies of their physical properties as a function of the doping density, which, consequently, calls for precise control of their doping density. In this study, we report a novel solid-state photoinduced charge-transfer reaction that dedopes highly conductive polyelectrolyte complexes such as poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate). Varying the UV-irradiation time of this material allows the carrier density inside the film to be precisely controlled over more than 3 orders of magnitude. We extract the carrier density, carrier mobility, and Seebeck coefficient at different doping levels to obtain a clear image of carrier-transport mechanisms. This approach not only leads to a better understanding of the physical properties of the conducting polymer but also is useful for developing applications requiring patterned, large-area conducting polymers.
探索共轭聚合物的各种应用需要系统地研究其物理性质作为掺杂密度的函数，这就需要对其掺杂密度进行精确控制。在这项研究中，我们报告了一种新的固态光致电荷转移反应，该反应可以使高导电性的聚电解质复合物（如聚（3,4-乙二氧基噻吩）/聚苯乙烯磺酸盐）去掺杂。改变这种材料的紫外辐照时间，可以使薄膜内部的载流子密度在 3 个数量级以上得到精确控制。我们在不同的掺杂水平下提取载流子密度、载流子迁移率和 Seebeck 系数，以获得载流子输运机制的清晰图像。这种方法不仅有助于更好地理解导电聚合物的物理性质，而且对于开发需要图案化、大面积导电聚合物的应用也很有用。
