Development of A Novel Eu3+ - Based LiCaY(MoO4 )3 Red Phosphor For Highly Efficient White LED Applications With Nearly Zero Concentration Quenching

Abstract

A new red-emitting phosphor Eu3+ based LiCaY(MoO4)3 was developed to address the challenge of efficient narrow-band red-emitting phosphors for white LED applications. The traditional solid-state reaction was used to synthesize a series of LiCaY(MoO4)3: Eu3+ phosphors. Eu3+ ion causes 5D0 → 7F2 electric dipole transition, responsible for the sharp emission at 616 nm. Concentration-dependent photoluminescence (PL) study showed that there is nearly zero concentration quenching, making it more efficient than commercial red phosphors. X-ray diffraction study shows a tetragonal lattice along with SEM, EDX, XPS was done for elemental analysis. Solid-state absorption spectra were taken for taking emission spectra.Low-temperature PL measurement was measured to observe its behavior at low temp. Thermal study was using DSC .At 150 °C, phosphor shows excellent emission intensity, calculated at room temperature. Thus, it can be useful for the fabrication of LEDs. The fabricated hybrid white LED showed pure white emission having good CRI, and a closer CIE to white light. The absolute quantum yield was calculated at excitation 465 nm. An effort has been made to synthesize orange-red (Sm3+) and deep-red (Sm3+, Eu3+) phosphors for application in plant growth. Also, the simultaneous doped phosphor was used for the production of deep-red LEDs.