Electrophosphorescence from a Conjugated Copolymer Doped with an Iridium Complex: High Brightness and Improved Operational Stability

High efficiency electrophosphorescent light‐emitting diodes (LEDs), with an emission peak at 600 nm, a luminance of 2200 cd m–2, and good operational stability were fabricated from a conjugated copolymer doped with an iridium complex. The devices exhibited an external quantum efficiency of 1.5 % and...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2003-01, Vol.15 (1), p.45-49
Main Authors: Gong, X., Ostrowski, J.C., Bazan, G.C., Moses, D., Heeger, A.J., Liu, M.S., Jen, A.K.-Y.
Format: Article
Language:English
Subjects:
Conjugated polymers
Electrophosphorescence
improved
Iridium complexes
operational
Quantum efficiency
Stability
Stability, operational, improved
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Summary:High efficiency electrophosphorescent light‐emitting diodes (LEDs), with an emission peak at 600 nm, a luminance of 2200 cd m–2, and good operational stability were fabricated from a conjugated copolymer doped with an iridium complex. The devices exhibited an external quantum efficiency of 1.5 % and a luminous efficiency of 3 cd A–1. These results demonstrate that electrophosphorescent devices with high brightness and operational stability can be produced in the form of polymer LEDs fabricated by processing the active materials from solution.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200390007