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Properties of Eu(III)-β-Diketonates with Different Phosphine OxideStructures and their Future Applications for LEDs
SUMMARY:
The abstract presents a new molecular design approach for Eu(III)complex with strong
luminescence. Eu(III) complexes have diverse applications and benefit from ionic and
non- ionic ligands, like β-diketonates and phosphine oxides to enhance the
photoluminescence. However, no material currently fulfils all requirements for efficient
red photoluminescence. The paper aim is to improve both photoluminescence and
solubility in polymers. Target is reduced quantum yields in inorganic phosphors for
micro-LED displays, especially advantage for red phosphor uses.
A novel approach to enhance the photoluminescence and quantum yields(ф) by
combining β-diketonates with various structures made of phosphine oxide. To
overcome issues with ligand exchange, asymmetric di phosphine dioxide ligands were
developed. To enhance photoluminescence while blocking exchange. The quantum
yields decreased due to the inability of uniform phosphine oxide coordination to
produce Eu(III) complex with macrocyclic tetra phosphine tetra oxide ligands.
So, two newly discovered branched tetra phosphine tetra oxide ligands, TDPBPO and
TDPPPO, to form Eu(III) complexes. These ligands improve the photoluminescence
intensity of Eu(III)- β- diketonates complex. TDPBPO increases it six times.
Additionally, coordinate several phosphine oxides and split two Eu(III) ions. Main
points of the proposal for novel highly soluble Eu(III) complexes for micro-LED
displays are, the need for strong photoluminescence and pure colour while overcoming
size variations in inorganic phosphors. Also, offering the advantages in micro-LED
applications like even dispersion and molecular red emission.
The proposed novel molecular design for Eu(III) complexes aims to enhance both
photoluminescence intensity and solubility, making them promising contenders for
micro-LED displays.
In Practical applications, need for micro LEDS.