Correlating nanomorphology with charge-transport anisotropy in conjugated-polymer thin films

Huang, Yi-Fang and Chang, Chan-Wei and Smilgies, Detlef-Matthias and Jeng, U-Ser and Inigo, Anto Regis and White, Jonathon David and Li, Kang-Chuang and Lim, Tsong-Shin and Li, Tai-De and Chen, Hsiang-Yun and Chen, Show-An and Chen, Wen-Chang and Fann, Wun-Shain and Inigo, Jesuraj (2009) Correlating nanomorphology with charge-transport anisotropy in conjugated-polymer thin films. Advanced Materials, 21 (29). pp. 2988-2992. ISSN 0935-9648

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Abstract

Anisotropic mobility in spin-coated MEH-PPV films is due to an interfacial layer of several nanometers at the film-substrate interface with a higher electron density assisted by local chain alignment parallel to the substrate. This layer is formed via spin-coating. The strength of this interface effect is dependent on the solvent used.