Novel Divalent Osmium Complexes : Synthesis, Characterization, Tuning of Emission, and use in Organic Light Emitting Diodes
Research output: Journal Publications and Reviews › RGC 22 - Publication in policy or professional journal
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 363-368 |
Journal / Publication | Materials Research Society Symposium - Proceedings |
Volume | 771 |
Publication status | Published - 2003 |
Externally published | Yes |
Conference
Title | Organic and Polymeric Materials and Devices |
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Place | United States |
City | San Francisco, CA |
Period | 22 - 25 April 2003 |
Link(s)
Abstract
In this work we present the synthesis and characterization of several novel osmium complexes of the form [Os(N-N)2 L-L]2+ 2Ts- or [Os(L-L)2 N-N]2+ 2Ts- designed for organic light emitting device (OLED) applications. In the complex notation N-N represents a derivative of 2,2′-bipyridine or 1,10-phenanthroline and L-L represents a strong π-acid arsine or phosphine ligand. Several counterions have been used and include tosylate, hexafluorophosphate, triflate, heptafluorobutyrate, chloride, bromide, and iodide. The complexes feature 3MLCT emission that ranges from 611-650 nm, which makes them suitable as an emission source for red OLEDs. Phosphorescent quantum yields as high as 45% and emission lifetimes as short as 400 nanoseconds have been reached. The complexes were incorporated into OLED and give off red, orange, yellow, and green electrophosphorescence. Red devices have been created using polyvmylcarb/2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole, polyvinylnapthalene/2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole, and polyfluorene host materials. OLEDs have been created which give brightness up to 3000 cd m-2 and efficiency up to 2.2% at 632 nm emission.
Citation Format(s)
Novel Divalent Osmium Complexes: Synthesis, Characterization, Tuning of Emission, and use in Organic Light Emitting Diodes. / Carlson, Branden; Phelan, Gregory D.; Kim, Joo H. et al.
In: Materials Research Society Symposium - Proceedings, Vol. 771, 2003, p. 363-368.
In: Materials Research Society Symposium - Proceedings, Vol. 771, 2003, p. 363-368.
Research output: Journal Publications and Reviews › RGC 22 - Publication in policy or professional journal