Properties of Eu(III)-β-Diketonates with Different Phosphine Oxide-Structures and Their Future Applications for LEDs

A novel molecular design concept of Eu(III) complexes for increasing photoluminescence intensity and solubility in polymers are proposed. In the field of micro-LED displays consisting of UV or Blue –LED arrays and phosphors, where the chips used are very small, particle size of phosphors must be small. However, quantum yields of inorganic phosphors decrease as particles size get smaller. The soluble Eu(III) complexes are advantageous for improving properties of LEDs as red phosphors.