Out-of-Plane Alignment of Conjugated Semiconducting Polymers by Horizontal Rotation in a High Magnetic Field
- Guoxing Pan
Guoxing PanInstitutes of Physical Science and Information Technology, Anhui University, Hefei 230601, P. R. ChinaAnhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory (HMFL), Chinese Academy of Sciences, Hefei 230031, P. R. ChinaMore by Guoxing Pan
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- Lin Hu*
Lin Hu*Email [email protected] (L.H.).Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory (HMFL), Chinese Academy of Sciences, Hefei 230031, P. R. ChinaCAS Key Lab of Photovoltaic and Energy Conservation Materials, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, P. R. ChinaMore by Lin Hu
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- Fapei Zhang*
Fapei Zhang*Email [email protected] (F.Z.).Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory (HMFL), Chinese Academy of Sciences, Hefei 230031, P. R. ChinaMore by Fapei Zhang
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- Qianwang Chen*
Qianwang Chen*Email [email protected] (Q.C.).Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, P. R. ChinaAnhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory (HMFL), Chinese Academy of Sciences, Hefei 230031, P. R. ChinaUniversity of Science and Technology of China, Hefei 230026, P. R. ChinaMore by Qianwang Chen
Abstract
The effective control of film morphology and molecular packing in the out-of-plane direction of semiconductor polymers plays a critical role in governing charge carrier transport in the direction perpendicular to the substrate. In this study, a highly out-of-plane alignment of the n-type polymer P(NDI2OD-T2) film has been successfully achieved by horizontal rotation in a high magnetic field (HR-HMF). The out-of-plane alignment of the P(NDI2OD-T2) film has showed a change from 72% face-on to 98.2% face-on lamellar texture as well as a 1.6-fold increase of the π–π stacking crystalline correlation length compared with that of as-cast polymer films without HR-HMF-induced alignment. Meanwhile, the film with near-perfect face-on molecular packing exhibited more than 18-fold enhancement of electron mobility compared to the unaligned film. The excellent electrical performance achieved with the HR-HMF process indicates its application potential for fabricating high-performance sandwich-type organic electronic devices, such as solar cells and light-emitting diodes.
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