摘要
文章采用两步固相法制备了BaSi_(2)O_(2)N_(2):Eu^(2+),Mn^(2+)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Eu^(2+)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。Mn^(2+)的掺杂并未改变BaSi_(2)O_(2)N_(2):Eu^(2+)的发光谱形和晶体结构,但是增强了Eu^(2+)的发光强度,当Mn^(2+)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Eu^(2+)在BaSi_(2)O_(2)N_(2):Eu^(2+)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。
BaSi_(2)O_(2)N_(2):Eu^(2+),Mn^(2+)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 Eu^(2+)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 Mn^(2+)did not alter the crystal structure and spectral shape of BaSi_(2)O_(2)N_(2):Eu^(2+)phosphor,but the luminescence intensity was clearly enhanced.When the doped concentration of Mn^(2+)was 0.02,the PL intensity increased by 46%.The surface morphology of the prepared phosphor was irregularly shaped.The crystallographic site of Eu^(2+)in BaSi_(2)O_(2)N_(2):Eu^(2+)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.
作者
王江涛
李媛媛
曹智
李郎楷
马保亮
王浩浩
WANG Jiang-tao;LI Yuan-yuan;CAO Zhi;LI Lang-kai;MA Bao-liang;WANG Hao-hao(College of Science,Nanjing Agricultural University,Nanjing,Jiangsu,210095,China;Guangdong Keyu Photoeletric Co.,Ltd.,R&D Department,Zhaoqing,Guangdong,526500,China)
出处
《新疆师范大学学报（自然科学版）》
2025年第2期45-49,共5页
Journal of Xinjiang Normal University(Natural Sciences Edition)
基金
国家自然科学基金青年项目(ZX2200468)
中央高校基本业务费(KYQN2023016)
江苏省自然科学基金青年项目(BK20200550)。
关键词
氮(氧)化物
稀土掺杂
固相反应法
晶体学格位
Nitrogen(Oxygen)Compounds
Rare-earth doping
Solid-state reaction
Crystallographic lattice site
