Abstract
ABSTRACT Pink light emissions are obtained from a sequence of Bi3+/Eu3+: LaAlO3 phosphors. The XRD patterns revealed the rhombohedral phase of LaAlO3 annealed at 700°C. The surface morphology of the prepared samples revealed the spherical morphology of synthesized particles. Photoluminescence (PL) spectroscopy showed pink-red luminescence due to electric dipole mechanism of Eu3+ corresponding to 5D0-7F2 transition at 618 nm. The increased PL intensity in Eu3+ ion’s emission was observed in LaAlO3:Bi3+, Eu3+ phosphors because of effective energy transfer (ET) from Bi3+ to Eu3+ ions in the host lattice. From, decay measurements, the life time and energy transfer efficiency are calculated as 1.96 ms and 76% respectively. . The (CIE) chromaticity colour coordinates have moved from bright blue to pink region as the amount of Eu3+ varies witnessing high-intensity pink light emissions from the Bi3+/Eu3+:LaAlO3 phosphors. The results declare that the developed phosphors are promising materials to develop light-emitting diodes (LEDs).
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