SYNTHESIS AND CHARACTERIZATION OF IRIDIUM COMPLEX FOR GREEN ORGANIC LIGHT EMITTING DEVICES

The rapid growth of Organic Light Emitting devices is of considerable interest due to their potential application in flexible, cost-competitive and large screen flat-panel displays. So, there has been much effort put into the development of novel emitters for use in OLED applications. Unlike fluorescence, phosphorescence makes use of both singlet and triplet excited states, suggesting the potential for reaching a maximum internal efficiency of 100%. Recently, there has been interest in the use of triplet emitting compounds primarily focusing on trivalent iridium complexes. In this work we report the synthesis of Ir(ppy)3 and its characterization by different techniques like DTA/TGA, FTIR, UV-Visible absorption, PL measurements etc. For making OLED, Ir(ppy)3 is doped in different host materials like TPD etc. The device configuration is ITO/TPD-5 % Ir(ppy)3/Alq3/LiF/Al.The EL and I-V characteristics have also been measured. 1