Red to near-infrared electrophosphorescence from a platinum complex coordinated with 8-hydroxyquinoline

A platinum complex coordinated with 2-phenylpyridine and 8-hydroxyquinoline [(phpy)Pt(q)] was synthesized. When (phpy)Pt(q) was used as a guest emitting material in the electrophosphorescent devices, the emission starts at similar to 600 nm extending to the near-infrared region. The device with 40 nm emitting layer of (phpy)Pt(q) doped into N, N'-dicarbazolyl-4, 4'-biphenyl (CBP) exhibits higher luminance and efficiency compared to the device with a layer of 20 nm (phpy)Pt(q) doped into CBP combined with a layer of 20 nm (phpy)Pt(q) doped into aluminum 8-hydroxyquinoline (Alq(3)) or a layer of 40 nm (phpy)Pt(q) doped into Alq(3). (c) 2006 American Institute of Physics.