KSC, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
Macromol Rapid Commun. 2018 Jul;39(14):e1700820. doi: 10.1002/marc.201700820. Epub 2018 Mar 5.
This work reports the synthesis, characterization, photophysical, and photovoltaic properties of five new thieno[3,2-b][1]benzothiophene isoindigo (TBTI)-containing low bandgap donor-acceptor conjugated polymers with a series of comonomers and different side chains. When TBTI is combined with different electron-rich moieties, even small structural variations can have significant impact on thin film morphology of the polymer:phenyl C70 butyric acid methyl ester (PCBM) blends. More importantly, high-resolution electron energy loss spectroscopy is used to investigate the phase-separated bulk heterojunction domains, which can be accurately and precisely resolved, enabling an enhanced correlation between polymer chemical structure, photovoltaic device performance, and morphology.
这项工作报道了五种新型噻吩并[3,2-b][1]苯并噻吩异吲哚（TBTI）-含低带隙给体-受体共轭聚合物的合成、表征、光物理和光伏性能，这些聚合物具有一系列单体和不同的侧链。当 TBTI 与不同的富电子部分结合时，即使是微小的结构变化也会对聚合物：苯基 C70 丁酸甲酯（PCBM）共混物的薄膜形态产生重大影响。更重要的是，高分辨率电子能量损失光谱被用来研究相分离的体异质结畴，这些畴可以被精确地分辨出来，从而增强了聚合物化学结构、光伏器件性能和形态之间的相关性。
