Abstract
? 2022 Elsevier B.V.A novel yellow-emitting trivalent dysprosium (Dy3+)-activated Na2Y2TeB2O10 (NYTBO) phosphor was synthesized via a traditional solid-state reaction. This paper presents the phase structure, morphological characterization, photoluminescent properties, concentration quenching, and thermal stability. Excitation at the near-ultraviolet (NUV) light of 350 nm gives rise to the blue and yellow emissions, coming from the intra-4f transitions of Dy3+. The optimal Dy3+ doping concentration is determined to be 7 mol%, and the quenching originates from dipole–dipole interaction. The thermal quenching study reveals that the phosphor possesses good thermal stability and excellent resistance to color shifting. The investigation on colorimetric properties suggests that the Dy3+-activated NYTBO yellow phosphor could be promising for the application in NUV-irradiated white light-emitting diode.
NSTL
Elsevier