首页|BaSi2O2N2:Eu2+,Mn2+荧光粉的制备及对Eu2+晶体学格位的讨论

BaSi2O2N2:Eu2+,Mn2+荧光粉的制备及对Eu2+晶体学格位的讨论

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文章采用两步固相法制备了BaSi2O2N2:Eu2+,Mn2+荧光粉,利用荧光光谱仪(PL)、扫描隧道显微镜(SEM)和X射线衍射仪(XRD)对所制备样品的荧光性能、颗粒表面形貌和晶体结构进行研究.其光谱呈现Eu2+的d-f跃迁的宽谱带特性,发射光谱峰值为490 nm,激发光谱覆盖了370~470 nm,与蓝光和近紫外光LED芯片的激发波长相匹配.Mn2+的掺杂并未改变BaSi2O2N2:Eu2+的发光谱形和晶体结构,但是增强了Eu2+的发光强度,当Mn2+的掺杂浓度为0.02 mol时,其发光强度提高了46%;所制备荧光粉表面形貌呈无规则状.通过UITERT经验公式讨论了Eu2+在BaSi2O2N2:Eu2+中的晶体学格位,所计算的理论值489 nm与实验观测值490 nm相近.
Preparation of BaSi2O2N2:Eu2+,Mn2+Phosphor and Discussion of Crystallographic Sites of Eu2+
BaSi2O2N2:Eu2+,Mn2+phosphor was prepared by a heterogeneous precipitation method. The crystal structure,particle morphology,and luminescent properties of the prepared phosphors were investigated by photoluminescence spectroscopy(PL),scanning electron microscopy(SEM) and X-ray diffraction(XRD). The results show that PL spectra exhibit the broad-band characteristic of Eu2+d-f transition,with emission spectra peaks at 490 nm and excitation spectra covering 370~470 nm,matching near-ultraviolet and blue LED chips. The doping of Mn2+did not alter the crystal structure and spectral shape of BaSi2O2N2:Eu2+phosphor,but the luminescence intensity was clearly enhanced. When the doped concentration of Mn2+was 0.02,the PL intensity increased by 46%. The surface morphology of the prepared phosphor was irregularly shaped. The crystallographic site of Eu2+in BaSi2O2N2:Eu2+was discussed by utilizing the UITERT empirical formula,and the calculated theoretical value of 489 nm is consistent with the experimental observed value of 490 nm.

Nitrogen(Oxygen) CompoundsRare-earth dopingSolid-state reactionCrystallographic lattice site

王江涛、李媛媛、曹智、李郎楷、马保亮、王浩浩

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南京农业大学 理学院,江苏 南京 210095

广东科煜光电有限公司 研发部,广东 肇庆 526500

氮(氧)化物 稀土掺杂 固相反应法 晶体学格位

2025

新疆师范大学学报(自然科学版)
新疆师大学报

新疆师范大学学报(自然科学版)

影响因子:0.457
ISSN:1008-9659
年,卷(期):2025.44(2)