ABSTRACT BaClF: Eu 3+ orange‐emitting phosphor was successfully synthesized by a hydrothermal method. The luminescent properties of the material were further enhanced by adding alkali metal ions. XRD analysis confirmed the phase purity and successful synthesis of the BaClF:Eu 3+ , M + phosphor. Under 393‐nm excitation, the fluorescence spectrum of the synthesized product exhibited a main emission peak at 593 nm. Experimental results indicate that the quenching concentration of Eu 3+ ions is 6.0 mol%. To further increase the luminescence intensity, alkali metal ions (Li + , Na + , and K + ) were also introduced as charge compensators. The results showed that Li + was identified as the most effective compensator, yielding a 2.11‐fold enhancement in emission intensity. The optimal doping concentration of Li + was determined to be 6.0 mol%. The internal quantum efficiency (IQE) was theoretically estimated using Judd‐Ofelt parameters, showing a substantial increase upon Li + doping. BaClF: Eu 3+ , Li + phosphor exhibits a color purity as high as 99.6% and a correlated color temperature of 1640.3 K. This indicates that BaClF: Eu 3+ , Li + is a highly promising orange‐emitting phosphor and a candidate material for solid‐state lighting applications.
Sun et al. (Wed,) studied this question.