Synthesis and Characterization of Cadmium Metal Complex Based Materials for OLED Applications

Abstract

Organic semiconductors have attracted lot of attention in academic and technological community due to its potential applications in organic light emitting diodes (OLEDs), organic photovoltaic cells etc. OLED is being considered as one of the most promising technology for flat-panel displays and in general lighting. The most important part of OLED devices is the electroluminescence layer, for which polymer and small molecular weight metal chelates can be used. The small molecule based metal chelates are the appropriate candidates as these are processed by conventional vacuum deposition techniques. Small molecule based Cd metal complexes can be used in OLED devices as electron and hole transport layer. It can also be used an emissive layer because of their wide spectral response in the visible region. The materials which I have chosen have good emissive properties in visible (particularly green and yellowish green ) region. My thesis work includes synthesis of three Cadmium complexes, cadmium {(2, 2′ bipyridine) 8-hydroxyquinoline} [Cd(Bpy)q], bis(2-methyl 8-hydroxy quinolinate) Cadmium [Cd(mq)2] and Cadmium {2-(2’-hydroxyphenyl) benzoxazole}(8- hydroxyquinoline) [Cd(HPB)q], and characterization by following techniques (FTIR, TGA, UV visible and Photoluminescence Spectroscopy.