© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
October 26, 2009
Functional Polymers: Polyfluorenes with Pure Blue Emission
Qiang Zhao, Shu-Juan Liu, and Wei Huang*
Due to their high photoluminescence quantum yields, charge-carrier mobility, and a good processibility polyfluorenes (PF) represent a class of promising polymers for the application in blue polymer light-emitting diodes (PLEDs). However, the appearance of long-wavelength green emission is a significant problem for this purpose. As a result, techniques for improving the color purity and stability of polyfluorenes are very important. In their Feature Article W. Huang and co-workers discuss the different routes they have gone to address this problem. Through various chemical approaches, including the incorporation of spirobifluorene units, heterofluorene units, hyperbranched, and starshaped structures into PF backbones, pure blue-emitting PFs with excellent color purity, and stability were obtained.
Macromol. Chem. Phys., DOI: 10.1002/macp.200900263
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