| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1495141 | Optical Materials | 2013 | 4 Pages |
Luminescent materials composed of Sr2.5−3x/2Ca0.5PrxAl1−yInyO4F (0.001 ⩽ x ⩽ 0.05 y = 0, 0.1) were prepared by solid-state reaction. The dependence of the luminescent intensity of Pr3+-doped oxyfluorides on the Pr3+ content (x = 0.001–0.05) is also discussed. The photoluminescence (PL) properties of Pr3+-doped in both Sr2.5Ca0.5Al1−yInyO4F and Sr2.5Ca0.5Al1−yInyO4−αF1−δ oxyfluorides were scrutinized. Replacement of Al3+ by In3+ in the Pr3+-doped host structure sensitized the material and enabled a novel and high-energy charge-transfer. The desired CIE values with emission through the red, orange, yellow, and blue–green regions of the spectra in the oxyfluorides were achieved. The effective sensitization using the defect-induced self-activating oxyfluoride phosphors will be useful in applications related to NUV-LEDs.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (74 K)Download as PowerPoint slideHighlights► The luminescent properties of Pr3+-doped oxyfluoride phosphors are investigated. ► The novel charge-transfer band in the phosphors is effectively sensitized with high energy transfer. ► Both of the activating and sensitizing behaviors can be combined in one material. ► The substitution of Pr3+ content in the oxyfluoride hosts is amenable to change CIE values.
