Dy <sup>3+</sup> ‐ and/or Sm <sup>3+</sup> ‐doped glass–ceramics containing NaGd(MoO <sub>4</sub> ) <sub>2</sub> crystalline phase for warm white light applications
Juxia Tong, Zhiwei Luo, Xinzhu Liu, Haozhang Liang, Xinyu Liu, Pan He, Anxian Lu
Abstract
Abstract The transparent glass–ceramics with Dy 3+ and/or Sm 3+ doping, which include the NaGd(MoO 4 ) 2 single‐crystal phase, were synthesized using the melt‐quenching method followed by heat treatment in the SiO 2 –B 2 O 3 –Na 2 O–ZnO–MoO 3 –Gd 2 O 3 system. The formation and fluorescent properties of Dy 3+ single‐doped precursor glasses were thoroughly examined, and the optimal doping amount of Dy 2 O 3 was determined to be 0.3 mol% by fluorescence spectroscopy. The ideal heat treatment procedure for glass–ceramics containing Dy 3+ and Sm 3+ was determined to be crystallized at a temperature of 650°C for a duration of 7 h. After undergoing heat treatment, the luminescence performance of glass–ceramic is significantly boosted, exhibiting an improvement that is roughly twice as substantial when compared to the precursor glass. Extensive research has been conducted to thoroughly examine the fluorescence capabilities of glass–ceramics doped with both Dy 3+ and Sm 3+ , and the intricate mechanism of energy transfer has been extensively explored. The transparent glass–ceramics doped with Dy 3+ and Sm 3+ and containing NaGd(MoO 4 ) 2 crystal phase can produce tunable luminescence from yellow to orange with a high color purity and a low correlated color temperature, which indicates that they have the potential to be applied to warm white light scenes such as household lighting under ultraviolet excitation.