Development of efficient electron-transporting polymers for light-emitting diodes

Michelle S. Liu; Xuezhong Jiang; Petra Herguth; Sen Liu; Alex K.Y. Jen

doi:10.1117/12.451874

3 March 2003 Development of efficient electron-transporting polymers for light-emitting diodes

Michelle S. Liu, Xuezhong Jiang, Petra Herguth, Sen Liu, Alex K.Y. Jen

Proceedings Volume 4800, Organic Light-Emitting Materials and Devices VI; (2003) https://doi.org/10.1117/12.451874
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

Polyfluorenes are a class of very efficient conjugated polymers used in the development of LEDs that exhibit very high hole mobility. In order to balance the charge transport and enhance quantum efficiency of the LEDs, fluorene-based copolymers were synthesized based on the statistic copolymerization between fluorene and 2,5-dicyanobezene. By attaching two electron-withdrawing cyano groups onto the phenylene ring, both the electron affinity and the electron conduction of these copolymers are greatly enhanced comparing to the fluorene homopolymer. LED devices using the cyano-containing fluorene copolymers show very bright emission and low turn-on voltages. The emission color of these polymers could be also tuned by exciplex formation between the polymers and amine-containing hole transporting materials.

Citation Download Citation

Michelle S. Liu, Xuezhong Jiang, Petra Herguth, Sen Liu, and Alex K.Y. Jen "Development of efficient electron-transporting polymers for light-emitting diodes", Proc. SPIE 4800, Organic Light-Emitting Materials and Devices VI, (3 March 2003); https://doi.org/10.1117/12.451874

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