Synthesis and Luminescence Studies of Lanthanide(III) Assemblies with Ir/Pt for OLED Applications

Oman's new Industrial Strategy is aligned with sustainable energy resources to meet the nation's energy requirements over the long-term. A strategy that invests on research projects to manufacture new materials that save the much-needed electrical energy. Light emitting diodes (LEDs) are low-energy consuming devices. LEDs are small, long lasting and energy efficient. LEDs consume up to 90% less power than the present incandescent bulbs. The aim of the present project is to design a new class of Ir(III)/Ln(III)-coordination complexes (Ln = Eu, Tb or Gd) based on the substituted 2,5-dihydroxyterephthalic acid, DHTP, completed by additional moieties of B-diketonate such Thenoyltrifluoroacetone (TTA) and Hexafluoroacetylacetone (HFAC) units. The use of the additional Ir(III) d-metal would result in unique luminescence properties from the dinuclear Ir-Eu assemblies and would improve their quantum yields for applications in light emitting devices (OLEDs) to save electrical energy. The proposed project will cover the following: (i) synthesis of a series of substituted 2,5-dihydroxyterephthalic acid, DHTP. (ii) synthesis of Ir(III) and Pt(II) complexes (iii) synthesis of the dinuclear M-Ln (M=Pt or Ir) assemblies incorporating B-diketonate ligands. (v) Chemical, spectroscopic, structural, electro-chemical characterization of the newly synthesized assemblies, (vi) study the optical properties of the new assemblies and their structure-property relationships (vii) fabrication of OLEDs using selected Eu(III) complexes, and assessment of their performance.