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Synthesis and charaterisation of phosphorescent copper (I) complexes for light emitting devices
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Over the last decade, many significant developments have been made to improve the active materials in a new generation of organic light emitting devices (OLEDs). Current OLED technology is focused on organo-transition metal complexes, which emit from the triplet excited state and exhibit bright
phosphorescence. Efficient in devices have been reported using these luminescent
materials, such as iridium and platinum complexes, however, rare metal abundance
concerns, high price and toxicology have inspired the study of alternative
phosphorescent materials, such as copper or silver complexes. In this research, novel copper complexes have been synthesized, such as trinuclear and mononuclear copper (I) complexes, using a range of ligands, such as
alkynyl, phosphine alkynyl and pyridine ligands. The synthesised complexes have
been characterised by with a range of techniques, such as UV/Vis absorption and
emission spectroscopy, nuclear magnetic resonance (NMR), thermogravimetric
analysis (TGA), differential scanning calorimetry (DSC), cyclic voltammetry (CV) and scanning electron microscopy (SEM).
Most of the copper complexes have shown very interesting luminescent properties in solution and solid state and some of them were studied for future application in a device.Research Council of U