Author:

Keywords:

lanthanides, rare earths, neodymium, luminescence, OLED, Science & Technology, Technology, Physical Sciences, Materials Science, Multidisciplinary, Materials Science, Coatings & Films, Physics, Applied, Physics, Condensed Matter, Materials Science, Physics, neodymium complex, sensitization, electroluminescence polymer, ENERGY-TRANSFER, PHOTOLUMINESCENCE, LUMINESCENCE, POLYMERS, BLENDS, 02 Physical Sciences, 09 Engineering, 10 Technology, Applied Physics, 40 Engineering, 51 Physical sciences

Abstract:

A structurally pure, near-infrared emissive Nd-(5,7-dichloro-8-hydroxyquinoline)4 tetrakis complex has been synthesized. When incorporated as a dopant in the blue emissive, hole conducting polymer poly(N-vinylcarbazole), PVK, sensitized neodymium ion emission was observed following photo-excitation of the polymer host. OLED devices were fabricated by spin-casting layers of the doped polymer onto glass/indium tin oxide (ITO)/3,4-polyethylene-dioxythiophene-polystyrene sulfonate (PEDOT) substrates. An external quantum efficiency of 1 × 10−3% and a near-infrared irradiance of 2.0 nW/mm2 at 25 mA/mm2 and 20 V was achieved.