Efficient red-emitting electrophosphorescent polymers
Chemistry of Materials, ISSN: 0897-4756, Vol: 20, Issue: 4, Page: 1629-1635
2008
- 49Citations
- 13Captures
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Article Description
We report the synthesis and characterization of a series of electrophosphorescent polymers with a polyfluorene backbone, containing a red-emitting iridium complex and carrier-transporting units as the substitutes of the C-9 position of fluorene. Different specimens and contents of the hole-transporting moieties were found to influence the electroluminescent properties of the polymers. Incorporation of a hole-transporting/electron- blocking interfacial layer and utilization of an efficient electron injection cathode led to the saturated red-emitting electrophosphorescent polymer devices with the peak luminance efficiency and power conversion efficiency of 9.3 cd A and 10.5 lm W, respectively. The efficiencies were 8 cd A/8 lm W and 5.9 cd A/4.6 lm W , respectively, at 100 and 1000 cd m. © 2008 American Chemical Society.
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