Synergistic Effects of External Electric Field and Solvent Vapor Annealing with Different Polarities to Enhance β-Phase and Carrier Mobility of the Poly(9,9-dioctylfluorene)Films
作者机构：State Key Laboratory of Supramolecular Structure and MaterialsJilin UniversityChangchun 130012P.R.China National Local Joint Engineering Laboratory for Synthesis Technology of High Performance PolymerCollege of ChemistryJilin UniversityChangchun 130012P.R.China
出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)
年 卷 期：2020年第36卷第6期
页 面：1310-1319页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：Supported by the National Natural Science Foundation of China(Nos.91333103 21574053)
主 题：Extermal elecric field Solvent vapor annealing Poly(9,9-dioctylfluorene) β-Phase Carrier mobility
摘 要：In this work,the synergistice efects of external electric field(EEF)and solvent vapor annealing to enhanceβ-phase and carrier mobility of poly(9,9-dioctylfuorene)(PFO)films were *** is found that EEF can promote the PFOβ-phase conformation transition and orientate the PFO chains along the EEF direction with the as-sistance of polar solvent vapor *** chain orderness is closely related to the solvent *** particular,the B-phase content in the annealed film of strong polar chloroform vapor increases from 18.7%to 34.9%after EEF *** a characteristic needle-like crystal is formed in the flm,as a result,the hole mobility is en-hanced by an order of *** mechanism can be attributed to the fast polarization of solvent dipole under the action of EEF,thus forming a driving force that greatly facilitates the orientation of PFO dipole *** also reveals that EEF driving of the PFO chains does not occur with an insoluble solvent vapor since the solvent molecules cannot swell the film,thus there is insufficient free volume for PFO chains to adjust their *** research enriches the understanding of the relationship between solvent vapor annealing and EEF in orientation polymers,and this method is simple and controlled,and capable of integrating into large-area thin film process,which provides new insights to manufacture low-cost and highly ordered polymer films,and is of great significance to enhance carrier mobility and efficiency of photoelectric devices based on polymer condensed matter physics.
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