Department of Chemical and Biological Engineering, Polymer Technology, Chalmers University of Technology, SE-412 96, Göteborg, Sweden.
Dalton Trans. 2009 Dec 7(45):10032-9. doi: 10.1039/b913769f. Epub 2009 Sep 14.
Conjugated polymers as electron donors in solar cells based on donor/acceptor combinations are of great interest, partly due to the possibility of converting solar light with a low materials budget. Six small bandgap polymers with optical bandgap ranging from 1.0-1.9 eV are presented in this paper. All polymers utilize an electron donor-acceptor-donor (DAD) segment in the polymer backbone, creating a partial charge-transfer, to decrease the bandgap. The design, synthesis and the optical characteristics as well as the solar cell characteristics of the polymers are discussed. The positions of the energy levels of the conjugated polymer relative to the electron acceptor are of significant importance and determine not only the driving force for exciton dissociation but also the maximum open-circuit voltage. This work also focuses on investigating the redox behavior of the described conjugated polymers and electron acceptors using square wave voltammetry. Comparing the electrochemical data gives important information of the structure-property relationships of the polymers.
基于供体/受体组合的太阳能电池中，共轭聚合物作为电子供体非常受关注，部分原因是其有可能用较低的材料预算来转化太阳光。本文提出了 6 种具有 1.0-1.9 eV 光学带隙的小带隙聚合物。所有聚合物都在聚合物主链中使用电子给体-受体-给体 (DAD) 段，形成部分电荷转移，从而降低带隙。讨论了聚合物的设计、合成、光学特性以及太阳能电池特性。共轭聚合物相对于电子受体的能级位置非常重要，不仅决定了激子解离的驱动力，而且决定了开路电压的最大值。这项工作还侧重于使用方波伏安法研究所描述的共轭聚合物和电子受体的氧化还原行为。比较电化学数据可以提供聚合物结构-性能关系的重要信息。
