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Use of the Beta-Phase of poly(9,9-dioctylfluorene) as a Probe Into the Interfacial Interplay for the Mixed Bilayer Films Formed by Sequential Spin-Coating

Use of the Beta-Phase of poly(9,9-dioctylfluorene) as a Probe Into the Interfacial Interplay for the Mixed Bilayer Films Formed by Sequential Spin-Coating

Rui Zhu, Jian-Ming Lin, Wei-Zhi Wang, Chao Zheng, Wei Wei, Wei Huang, Yun-Hua Xu, Jun-Biao Peng, Yong Cao

J Phys Chem B. 2008 Feb 14;112(6):1611-8.

PMID: 18201075

Abstract:

Spin-coating one polymer solution on another spin-cast polymer film is believed to result in unfavorable interfacial mixing. Here, we show some results to demonstrate that some interesting properties will be obtained in such mixed bilayer films formed by sequential spin-coating. Poly(9-vinylcarbazole) and poly(9,9-dioctylfluorene-2,7-diyl) were chosen as the first and second polymer layers, respectively. By varying the initial thickness of the first layer, some interesting variations were observed. The spectroscopic features of beta-phase polyfluorene were utilized to reflect the variations at the complicated interface. Morphologies were also presented to illustrate that the variations of spectroscopic features were accompanied with some interesting morphological changes. On the basis of these results, a schematic model was proposed to gain insight into the mixed interface formed by sequential spin-coating. Polymer light-emitting devices based on such films were also investigated.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP25067598	Poly(9-vinylcarbazole)		25067-59-8	Price

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