Jian He - High-efficiency polymer electrophosphorescent diodes based on an Ir (III) –complex

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  Publication Details (including relevant citation   information):

  Applied Physics Letters, 87, 221103 (2005)


  Single-layer high-efficiency green electrophosphorescent   light-emitting diodes were fabricated by doping an iridium   complex bearing pinene group—tris(5-phenyl-10,10-dimethyl-4-aza-   tricycloundeca-2,4,6-triene)Iridium(III)—into a blended host of   poly(vinylcarbazole) and   2-(4-biphenylyl)-5-(4-tert-butulphenyl)-1,3,4-oxadiazol. The   optimized device shows a turn-on voltage below 4 V, and a very   high peak luminescent efficiency of 29.0 cd/A. Comparing with the   state-of-the-art electrophosphorescent devices, the present   device has a much slower decrease of efficiency with increase of   current density; a high efficiency of 20.7 cd/A can still be   achieved at a high current density of 150 mA/cm2 (brightness = 30800 cd/m2)

  Address (URL): http://apl.aip.org/resource/1/applab/v87/i22/p221103_s1?isAuthorized=no