Synthesis, crystal structure and photoluminescence of novel blue-emitting Eu2+-doped (SiC)x–(AlN)1
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Synthesis, crystal structure and photoluminescence of novel blue-emitting Eu2+-doped (SiC)x–(AlN)1
- 发表刊物：
- RSC advance
- 摘要：
- Novel blue-emitting phosphors with the chemical composition of (SiC)x–(AlN)1x:yEu2+ (x ¼ 0.06–0.50, y ¼
0.001–0.01) were synthesized by a nitriding combustion reaction route, and the crystal structure,
luminescence properties and thermal stability of the (SiC)x–(AlN)1x:yEu2+ phosphors were investigated
by theoretical and experimental approaches. First-principles calculation results prove that the solid
solution of SiC with AlN promotes the doping of Eu2+ ions into the (SiC)x–(AlN)1x host lattice, and Eu2+
ions tend to occupy Al sites of the host. The synthesized (SiC)x–(AlN)1x:yEu2+ phosphors absorb light in
the region of 250–425 nm and show a single and symmetric broadband emission centered at about 470
nm due to the 4f65d–4f7 transitions of Eu2+. The luminescence intensity increases with the SiC content
and reaches its maximum at x ¼ 0.20. The critical quenching concentration of Eu2+ in the (SiC)0.20–
(AlN)0.80:yEu2+ phosphor is about y ¼ 0.006. The composition-optimized (SiC)0.20–(AlN)0.80:0.006Eu2+
phosphor shows a small thermal quenching, retaining the luminance of 91.1% at 150 C. The CIE
coordinates were measured as (0.135, 0.167) with high color purity. The above results indicate that
(SiC)x–(AlN)1x:yEu2+ is a promising candidate as a blue-emitting ultraviolet convertible phosphor for
white LEDs, and the combustion reaction route is expected to be applicable to the synthesis of other
kinds of nitride phosphors.
- 合写作者：
- Z Q Shi, Z L Wei, C He*
- 卷号：
- 4,
- 页面范围：
- 62926
- 是否译文：
- 否
- 发表时间：
- 2014-11-21