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Stepwise Structural Evolution of a DTS-F2BT Oligomer and Influence of Structural Disorder on Organic Field Effect Transistors and Organic Photovoltaic Performance
Chemistry of Materials ( IF 7.2 ) Pub Date : 2016-12-05 00:00:00 , DOI: 10.1021/acs.chemmater.6b03763
Chi-Feng Huang,Sin-Hong Huang,Chou-Ting Hsieh,Yi-Hsiang Chao,Chia-Hua Li,San-Lien Wu,Yi-Fan Huang,Chen-Yang Hong,Chain-Shu Hsu,Wei-Tsung Chuang,Chien-Lung Wang

An A–D–A oligomer, DTS(F2BT)2, was synthesized; its structural evolution was studied with DSC, POM, 2D-WAXD, and in-situ GI-XRD. The structural evolution of DTS(F2BT)2 is stepwise and kinetically slow. Both rapid drying and the presence of PC71BM trapped DTS(F2BT)2 in a less ordered nematic (N) phase. PDMS-assisted crystallization enabled a pristine DTS(F2BT)2 thin film to attain a more ordered equilibrium phase, and enhanced the OFET mobility of DTS(F2BT)2. In OPV devices, DIO additive drove the DTS(F2BT)2 domains in the DTS(F2BT)2:PC71BM blended film from the N phase toward the equilibrium phase, and resulted in enhanced OPV performances. These results reveal the slow ordering process of the A–D–A oligomer, and the importance of monitoring the degree of structural evolution of the active thin films in organic optoelectronics.

中文翻译:

DTS-F 2 BT低聚物的逐步结构演变以及结构紊乱对有机场效应晶体管和有机光伏性能的影响

合成了A–D–A低聚物DTS(F 2 BT)2。用DSC,POM,2D-WAXD和原位GI-XRD研究了其结构演变。DTS(F 2 BT)2的结构演化是逐步的且动力学缓慢。快速干燥和PC 71 BM的存在都使DTS(F 2 BT)2陷于序度较小的向列相(N)。PDMS辅助结晶使原始DTS(F 2 BT)2薄膜达到更有序的平衡相,并增强了DTS(F 2 BT)2的OFET迁移率。在OPV设备中,DIO添加剂驱动DTS(F 2 BT)2从N相到平衡相,DTS(F 2 BT)2:PC 71 BM混合膜中的区域发生了变化,从而提高了OPV性能。这些结果揭示了A–D–A低聚物的缓慢排序过程,以及监测有机光电电子中有源薄膜的结构演化程度的重要性。
更新日期:2016-12-05
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