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- Title
Ce<sup>3+</sup>-doped silicate-based down-conversion phosphors: investigation on synthesis, structure and photoluminescence properties.
- Authors
Chen, Yan; Wang, Tinglan; Zhou, Tianyi; Xia, Minghao; Wang, Yongqian
- Abstract
Two types of Ce3+-doped silicate-based phosphors with different silicon-to-oxygen (Si-to-O) ratio have been synthesized by high-temperature solid state reaction and investigated systematically the influence of Si-to-O ratio on host structures and photoluminescence properties of Ce3+-doped phosphors. Due to diverse Si-to-O ratio in two silicate-based hosts, Ce3+ shows different site occupancies and luminescence behaviors, since the host structure has been changed by introducing O atom. In the Sr2+x−yMgSi2O7+x:yCe3+ (x = 0 or 1, y = 0.005-0.09) phosphors system, the excitation wavelength both showed at UV region, the emission wavelength changed from violet to blue light region with increasing the value of x (x = 0 or 1), which have been analyzed by the crystal-field effect of Ce3+. The PL results indicate that Sr2−0.01MgSi2O7:0.01Ce3+ phosphors (x = 0) exhibits a deep-blue emission with peak at 405 nm, while the peak of Sr3−0.01MgSi2O8:0.01Ce3+ phosphors (x = 1) moves to 395 nm from the increased ratio of Si-to-O. Besides, the optimal concentration of doping Ce3+ are both at 0.01 in two kinds of silicate-based phosphors which display stable and good luminescent performance. Our work provides a novel thinking of regulating photoluminescence properties by manipulating Si-to-O ratio in silicates and a valuable example for the emission characteristics of Ce3+ activators in silicate-based phosphor hosts.
- Subjects
PHOTOLUMINESCENCE; X-ray diffraction; SOLID state chemistry; THERMAL stability; LIGHT emitting diodes
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 7, p5573
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-018-8526-1