Phosphorescent cationic iridium(III) complexes with cyclometalating 1H-indazole and 2H-[1,2,3]-triazole ligands

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High-performance pure blue phosphorescent OLED using a novel bis-heteroleptic iridium(III) complex with fluorinated bipyridyl ligands

Michael Graetzel, Mohammad Khaja Nazeeruddin

A novel pure blue phosphorescent emitter FK306 with fluorinated bipyridyl ligands was developed. The I-p level was determined to be 6.3 eV by photoelectron yield spectroscopy (PYS) in the solid state. The photophysical properties of a FK306/mCP film were e ...

Royal Society of Chemistry2013

Blue Phosphorescence of Trifluoromethyl- and Trifluoromethoxy-Substituted Cationic Iridium(III) Isocyanide Complexes

Michael Graetzel, Mohammad Khaja Nazeeruddin, Rosario Scopelliti

We report the first comprehensive comparative synthetic, structural, electrochemical, and spectroscopic study of an extended series of fluorocarbon-modified iridium(III) complexes. We prepared seven new cationic Ir(III) complexes with tert-butyl isocyanide ...

American Chemical Society2012

Efficient orange light-emitting electrochemical cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Rosario Scopelliti

We report the first bis-cyclometalated cationic iridium(III) complex with N-aryl-substituted 1H-imidazo [4,5-f][1,10]phenanthroline. The complex emits yellow-orange phosphorescence with a maximum at 583 nm, a quantum yield of 43%, and an excited-state life ...

Royal Society of Chemistry2012

Bright Blue Phosphorescence from Cationic Bis-Cyclometalated Iridium(III) Isocyanide Complexes

Michael Graetzel, Mohammad Khaja Nazeeruddin, Rosario Scopelliti

We report new bis-cyclometalated cationic indium(III) complexes ((CN)-N-boolean AND)(2)Ir(CN-tert-Bu)(2) that have tert-butyl isocyanides as neutral auxiliary ligands and 2-phenylpyridine or 2-(4'-fluoropheny1)-R-pyridines (where R is 4-methoxy, ...

2012

The Role of Site-Specific Hydrogen Bonding Interactions in the Solvation Dynamics of N-Acetyltryptophanamide

Majed Chergui, Ahmed Maher Fahmy El-Zohry

Measurements of the ultrafast broadband UV fluorescence of N-acetyltryptophanamide (NATA) provide detailed information on its relaxation patterns in three different solvents: methanol (MeOH), water and acetonitrile (ACN). Several processes leading to excit ...

Amer Chemical Soc2012

Quantum Yield Measurement of Fluorescent Zeolite Nanopigments

Libero Zuppiroli, Rolando Ferrini

Organic fluorescent molecules are infiltrated in the channels of zeolite L nanocrystals, thus creating organic-inorganic fluorescent nanoparticles. Combined with dielectric matrices, these fluorescent nanopigments open the way to the realization of novel o ...

Wiley-Blackwell2009

Temperature effects on the spectral properties of colloidal CdSe nanodots, nanorods, and tetrapods

Majed Chergui, Frank van Mourik, Awos Al Salman

The temp. dependence of the absorption and fluorescence spectra of colloidal CdSe nanocrystals was compared for three different shapes (dots, rods, and tetrapods) at 4-300 K. While the shift of the fluorescence max. indicates little dependence on the shape ...

2007

A Single Photon Avalanche Diode Array Fabricated in 0.35um CMOS and based on an Event-Driven Readout for TCSPC Experiments

Edoardo Charbon, Cristiano Niclass

The design and characterization of an imaging sensor based on single photon avalanche diodes is presented. The sensor was fully integrated in a 0.35µm CMOS technology. The core of the imager is an array of 4x112 pixels that independently and simultaneously ...

2006

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High-performance pure blue phosphorescent OLED using a novel bis-heteroleptic iridium(III) complex with fluorinated bipyridyl ligands

Michael Graetzel, Mohammad Khaja Nazeeruddin

Royal Society of Chemistry2013

A Single Photon Avalanche Diode Array Fabricated in 0.35um CMOS and based on an Event-Driven Readout for TCSPC Experiments

Edoardo Charbon, Cristiano Niclass

2006