Synthesis and characterization of Eu3+/Dy3+ codoped composite phosphors SrAl2Si2O8/SrAlSi1/2O7/2 via a one-pot nitrate-gel process

• Published in: Journal of sol-gel science and technology Vol. 62; no. 2; pp. 160 - 169
• Main Authors: Lu, Zhengwu, Weng, Luqian, Song, Shenhua, Zhang, Peixin, Hou, Qianqian, Ren, Xiangzhong
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-05-2012; Springer; Springer Nature B.V
• Subjects: Ceramics; Chemistry; Chemistry and Materials Science; Colloidal gels. Colloidal sols; Colloidal state and disperse state; Composites; Diffraction; Europium; Exact sciences and technology; General and physical chemistry; Glass; Heat treatment; Infrared analysis; Infrared spectroscopy; Inorganic Chemistry; Luminescence; Materials Science; Nanotechnology; Natural Materials; Optical and Electronic Materials; Optical properties; Original Paper; Phase separation; Phosphors; Precursors; Sol gel process; Synthesis; Thermal analysis; Thermal decomposition; X-ray diffraction; X-rays; One-pot; Sol–gel; Composite phosphors; Phase separation; One pot reaction; Heat treatment; Thermal decomposition; Sol-gel; Doping; Luminescence; Nitrates; X ray diffraction; Precursor; Composite material; Characterization; Infrared spectrometry; Synthesis; Sol gel process; Defect; Thermal analysis; Structure
• ISSN: 0928-0707; 1573-4846
• DOI: 10.1007/s10971-012-2704-z

Composite phosphors SrAl
2
Si
2
O
8
/SrAlSi
1/2
O
7/2
codoped with Eu
3+
and Dy
3+
were synthesized via a simple one-pot nitrate-gel process. The thermal decomposition process of the precursor is investigated by thermal analysis, X-ray diffraction and infrared spectroscopy, respectively. The as-prepared Eu
3+
/Dy
3+
codoped SrAl
2
Si
2
O
8
/SrAlSi
1/2
O
7/2
phosphors could yield blue (436 nm), bluegreen (486 nm), yellow (583 nm), and red (617 nm) lights under near-UV 380 nm excitation from a composite matrix produced by spontaneous phase separation during heat treatment of the precursor. Moreover, the effects of Dy
3+
doping concentration on the structures, defect features, and luminescence properties of the composite phosphors were examined in detail.