A Red-Emitting Phosphor and its Luminescent Properties

Abstract

Under 616 nm monitoring, excitation peaks at 395, 465, and 535 nm were observed for the red-emitting phosphor Li_0.3Y_0.82Mo_0.1W_0.9O_4+δ:0.08Eu³⁺ (LYMW), which was synthesized using the solid-state method. Particularly in the range of 250 to 420 nm, excited peaks can be assigned to the transitions of O²⁻→Mo⁶⁺/W⁶⁺/Eu³⁺ and four sharp peaks can be assigned to the 4f–4f transition of Eu³⁺ (∼360 nm from the ⁷F₀→⁵D₄ transition, ∼380 nm from the ⁷F₀→⁵L₇ transition, ∼395 nm from the ⁷F₀→⁵L₆ transition, and ∼415 nm from the ⁷F₀→⁵D₃ transition).