TITLE

Green electroluminescence from an ionic iridium complex

AUTHOR(S)
Slinker, Jason D.; Koh, Cheong Y.; Malliaras, George G.; Lowry, Michael S.; Bernhard, Stefan
PUB. DATE
April 2005
SOURCE
Applied Physics Letters;4/25/2005, Vol. 86 Issue 17, p173506
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report green emission from a single-layer device based on the ionic transition metal complex [Ir(F-mppy)2(dtb-bpy)]+(PF6-), where F-mppy is 2-(4′-fluorophenyl)-5-methylpyridine and dtb-bpy is 4,4′-di-tert-butyl-2,2′bipyridine. External quantum efficiencies of up to 1.1% are achieved with air-stable contacts, and up to 1.8% with a CsF/Al top contact. Addition of the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate was found to improve the device response time and cause a bias-dependent shift in the emission spectrum. As a result, electroluminescence was observed at 531 nm (CIE coordinates: 0.3230 and 0.5886), the lowest wavelength reported to date for a device based on ionic transition metal complexes.
ACCESSION #
17227578

 

Related Articles

  • Theoretical studies of the first- and second-row transition-metal mono- and dicarbonyl positive ions. Barnes, Leslie A.; Rosi, Marzio; Bauschlicher, Charles W. // Journal of Chemical Physics;7/1/1990, Vol. 93 Issue 1, p609 

    Ab initio calculations have been carried out on the first- and second-row transition-metal mono- and dicarbonyl positive ions. The bonding in these systems is discussed in detail. Trends in the series of mono- and dicarbonyl ions and between the first- and second-row transition metals are...

  • Physical-chemical properties of VPO-catalysts surface modified by ions of transition metals. Kiziun, E. V.; Zazhigalov, V. A. // Chemistry, Physics & Technology of Surface / Khimiya, Fizyka ta ;2014, Vol. 5 Issue 1, p30 

    An influence of the modification with the transition metal ions (Me= Ti, Fe, Zr, Mo, La, W,Ag, Ni ) on physical-chemical properties of VPO-composition surface was studied. VPMeO-samples were investigated by the X-ray phase analysis, X-ray photoelectron spectroscopy, differential thermal analysis...

  • Recent advances in light-emitting electrochemical cells. Costa, Rubén D.; Ortí, Enrique; Bolink, Henk J. // Pure & Applied Chemistry;Dec2011, Vol. 83 Issue 12, p2115 

    Light-emitting electrochemical cells (LECs) are solution-processable thin-film electroluminescent devices consisting of a luminescent material in an ionic environment. The simplest type of LEC is based on only one material, ionic transition-metal complexes (iTMCs). These materials are of...

  • Ion transport in complex phosphates Li3 - 2 x Nb x In2 - x (PO4)3. Shaikhlislamova, A.; Zhuravlev, N.; Stenina, I.; Izotov, A.; Yaroslavtsev, A. // Doklady Physical Chemistry;May2008, Vol. 420 Issue 1, p118 

    The article proposes that cationic disorder can be induced by varying the ratio of cations in the Li3-2xNbxIn2-x(PO4)3 system. In this experiment, materials of composition Li3-2xNbxIn2-x(PO4)3 were synthesized by annealing a stoichiometric mixture of lithium carbonate, ammonium hydrogen...

  • High-efficiency white organic light-emitting devices using a blue iridium complex to sensitize a red fluorescent dye. Xie, W. F.; Chew, S. L.; Lee, C. S.; Lee, S. T.; Wang, P. F.; Kwong, H. L. // Journal of Applied Physics;11/1/2006, Vol. 100 Issue 9, p096114 

    We report the fabrication of high-efficiency white organic light-emitting devices (WOLEDs) by using a blue phosphorescent dye iridium (III) tris(5-(2,4-difluoro-phenyl)-10,10-dimethyl- 4-aza-tricycloundeca-2,4,6-triene) (Ir(F2-mppy)3) to sensitize the red dye[2-methyl-6-...

  • Thermal stability of Co/SiO2 multilayers for use in the soft x-ray region. Ishino, Masahiko; Koike, Masato; Kanehira, Mika; Satou, Futami; Terauchi, Masami; Sano, Kazuo // Journal of Applied Physics;7/15/2007, Vol. 102 Issue 2, p023513 

    The thermal stability of Co/SiO2 multilayers was evaluated. Multilayer samples were deposited on Si substrates by means of the ion beam sputtering method and annealed at temperatures from 100 °C to 600 °C in a vacuum furnace. For the structural and optical evaluations, small-angle x-ray...

  • Ionization and Coulomb explosion of small group 10 transition metal oxide clusters in strong light fields. Ross, Matt W.; Castleman, A. W. // Journal of Chemical Physics;8/28/2012, Vol. 137 Issue 8, p084307 

    The ionization properties of small group 10 metal oxide clusters are explored using ultrafast pulses centered at 624 nm. Maximum atomic charge states resulting from Coulomb explosion were observed to be Ni3+, Pd3+, Pt5+, and O2+ species with similar ionization potentials ∼30-35 eV. Ion...

  • Temperature dependent segregation of metals at Si-SiO[sub 2] interfaces during oxygen ion.... Williams, J.S.; Short, K.T. // Applied Physics Letters;1/27/1997, Vol. 70 Issue 4, p426 

    Investigates the temperature-dependent segregation of transition metals at silicon-silicon dioxide interfaces during oxygen ion bombardment. Use of Rutherford backscattering and channeling techniques; Tendency of metals to be retained in an amorphous silicon layer; Dependence of the magnitude...

  • Charge dependence of chemisorption patterns for transition metal clusters. Brucat, P. J.; Pettiette, C. L.; Yang, S.; Zheng, L.-S.; Craycraft, M. J.; Smalley, R. E. // Journal of Chemical Physics;10/15/1986, Vol. 85 Issue 8, p4747 

    A method is presented for the measurement of the chemisorptive reactivity of transition metal cluster ions at near room temperature. Similar to a technique introduced previously for neutral clusters [Rev. Sci. Instrum. 56, 2123 (1985)], this cluster ion method utilizes a fast-flow reactor...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics