The orientation of facial (fac) tris-cyclometalated iridium complexes in doped films prepared by vacuum deposition is investigated altering the physical shape and electronic asymmetry molecular structure. Angle-dependent photoluminescence spectroscopy Fourier-plane imaging microscopy show that roughly spherical fac-tris(2-phenylpyridyl)iridium (Ir(ppy)3) isotropic, whereas are oblate spheroids,...

Field electron microscopy was used to study the modification of emission surface a carbonized iridium field emitter when concentration barium atoms on changes within monolayer coating. When are adsorbed at temperature T=300 K, no significant in electronic images observed. The formation islands graphene region (100) face annealing T=1200 K detected. At T=1500 island is dissolved and intercalated...

BaIrIn2 was synthesized from the elements in a sealed tantalum tube in an induction furnace. The indide was investigated by powder and single crystal X-ray data: Cmcm, a = 443.3(1), b = 1151.3(2), c = 806.0(1) pm, wR2 = 0.0471, 352 F2 values, and 16 variable parameters. The iridium and indium atoms build up two-dimensional [IrIn2]2− polyanions (279 – 281 pm Ir–In and 310 — 314 pm In–In) which a...

The workflow of a high throughput screening setup for the rapid identification of new and improved sensor materials is presented. The polyol method was applied to prepare nanoparticular metal oxides as base materials, which were functionalised by surface doping. Using multi-electrode substrates and high throughput impedance spectroscopy (HT-IS) a wide range of materials could be screened in a s...

A deep-red phosphorescent ionic iridium(III) complex is prepared and incorporated into a polymer. Both the complex (1) and the polymer (2) were used as the single active material in solid-state light-emitting electrochemical cells (LECs). The devices built up using 1 and 2 emit in the deep-red region of the visible spectrum with CIE coordinates x = 0.710; y = 0.283 and x = 0.691; y = 0.289, res...

Stable green light emission and high efficiency organic devices with three polymer layers were fabricated using bis[2-(4'-tert-butylphenyl)-1-phenyl-1H-benzoimidazole-N,C²'] iridium(III) (acetylacetonate) doped in blended host materials. The 1 wt% doping concentration showed maximum luminance of 7841 cd/cm² at 25.6 V and maximum current efficiency of 9.95 cd/A at 17.2 V. The electroluminescence...

The performance of metal microelectrodes for stimulating and recording neuronal action potentials depends on precise control of their geometrical, electrical and mechanical properties. We describe a combination of materials whose properties approach fundamental physical limitations on achievable performance and reproducible fabrication techniques that provide probes with very small dimensions. ...

The photo-excitation and relaxation of a new cyclometalated complex, Ir(ppy)2fppy, is investigated through the measurement of absorption and photoluminescence spectra. Comparison of Ir(ppy)2fppy with Ir(ppy)3 reveals that the lowest energy excited state of Ir(ppy)2fppy is localised on the aldehyde-substituted ligand, thus giving the complex its characteristic orange emission (lmax # 600 nm). OL...

In the title compound, [Ir(C(13)H(9)N(4))(C(15)H(10)N)(2)]·2CDCl(3), the coordination at iridium is octa-hedral, but with narrow ligand bite angles ranging from 74.85 (8) to 83.99 (8)°. The bond lengths at iridium show the expected trans influence, with Ir-N trans to C being appreciably longer than trans to N. The chelate rings are mutually perpendicular to a reasonable approximation [interplan...

Combining a sterically bulky, electron-deficient 2-(2,4-difluorophenyl)-4-(2,4,6-trimethylphenyl)pyridine (dFMesppy) cyclometalating C4N ligand with an electron rich, highly rigidified 1,10-(a,a0-o-xylylene)-2,20biimidazole (o-xylbiim) N4N ligand gives an iridium complex, [Ir(dFMesppy)2(o-xylbiim)](PF6), that achieves extraordinarily bright blue emission (FPL = 90%; lmax = 459 nm in MeCN) for a...