Efficient yellow electroluminescence from a single layer of a cyclometalated iridium complex.
We report on the spectroscopic, electrochemical, and electroluminescent properties of [Ir(ppy)(2)(dtb-bpy)](+)(PF(6))(-) (ppy: 2-phenylpyridine, dtb-bpy: 4,4'-di-tert-butyl-2,2'-dipyridyl). Single-layer devices were fabricated and found to emit yellow light with a brightness that exceeds 300 cd/m(2) and a luminous power efficiency that exceeds 10 Lm/W at just 3 V. The PF(6)(-) space charge was found to dominate the device characteristics.
Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA.
Jason D
JD
Slinker
Alon A
AA
Gorodetsky
Michael S
MS
Lowry
Jingjing
J
Wang
Sara
S
Parker
Richard
R
Rohl
Stefan
S
Bernhard
George G
GG
Malliaras