摘要
本文首次报道在3.15GPa,1200℃高温高压条件下合成出了SrSiO :Eu^(3+)Bi^(3+)发光材料,并与常压合成产物相比较,研究了高温高压合成产物的结构以及合成压力、温度对发光特性的影响。结果表明,高压合成产物SrSiO :Eu^(3+)Bi^(3+)的结构为膺正交(单斜)结构,而常压合成的为六角结构,高压使发光强度下降,量子发光效率下降了88％,谱线红移达756cm^(-1),半值宽度也显著增加,发光性能的改变是由于压致结构的变化引起的。
The SrSiO3 = Eu3+Bi3+ samples were firstly synthesized by high-pressure (HP) and high-temperature (HT) method under 3. 15 GPa and 1200℃. Comparing with those prepared under atmosphere pressure, the structure of the samples and the influence of pressure and temperature on the luminescence properties have been studied. It shows that the structure of the samples synthesized by HP and HT is of monoclinic. while the samples prepared under atmosphere pressure is of hexa- gonal. At the same time, for the samples sinthesized by HP and HT the intensity and quantum luminescence efficiency decreased obviously.the half-width was broadened and the red shift of emission peak was enlarged to 756cm-1.The variation of the luminescence characters is due to the pressure-induced changes of crystal field interactions.
出处
《高压物理学报》
CAS
CSCD
北大核心
1990年第4期284-290,共7页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金
关键词
稀土
结构
相变
发光
谱线红移
high-temperature and high-pressure synthesis, SrSiO3:Eu3+Bi3+, struc-tural transition, red shift of emission peak.
