Nondilute 1,2-dichloroethane solution of poly(9,9-dioctylfluorene-2,7-diyl): A study on the aggregation process |
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| Authors: | Meng-na Yu Bin Liu Jin-yi Lin Tao Li Dan Lu Feng Liu Wen-sai Zhu Ling-hai Xie Wei Huang |
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| Institution: | 1. Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials(IAM),Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing University of Posts & Telecommunications, Nanjing 210023, China;2. Key Laboratory of Flexible Electronics(KLOFE)& Institute of Advanced Materials(IAM),Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing Tech University(Nanjing Tech), Nanjing 211816, China;The Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UK;3. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry,Jilin University, Changchun 130012, China;4. Key Laboratory of Flexible Electronics(KLOFE)& Institute of Advanced Materials(IAM),Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing Tech University(Nanjing Tech), Nanjing 211816, China |
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| Abstract: | Molecular aggregates in conjugated polymer (CP) solution can propagate into mesoscale morphology of the relevant film and further dominate the optoelectronic property. Herein, we probed the aggregation behavior of poly(9,9- dioctylfluorene-2,7-diyl) (PFO) and studied its influence on the photophysical property in 1,2-dichloroethane (DCE) solution, where the contents of β-phase or -aggregates increased with prolonged aging time. Thereinto, high quality β-film was fabricated from DCE solution with critical aggregate time of 6 min. The film exhibited excellent surface morphology and characteristic emission of β-phase. Meanwhile, films prepared from aged DCE solutions exhibited high crystallinity, which was promising to obtain higher photoluminance efficiency and charge transport ability simultaneously. Therefore, it is significant to get deep insight into the aggregation behavior of CP, which is involved not only with the solution-processing technology of plastic device, but also with the optoelectronic property of CP. |
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| Keywords: | Poly(9 9-dioctylfluorene-2 7-diyl) Aggregation behavior Film morphology β-Phase |
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