BaSi_(2)O_(2)N_(2):Eu^(2+),Mn^(2+)荧光粉的制备及对Eu^(2+)晶体学格位的讨论  

Preparation of BaSi_(2)O_(2)N_(2):Eu^(2+),Mn^(2+)Phosphor and Discussion of Crystallographic Sites of Eu^(2+)

作　　者：王江涛 李媛媛 曹智 李郎楷 马保亮[1] 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)

机构地区：[1]南京农业大学理学院,江苏南京210095 [2]广东科煜光电有限公司研发部,广东肇庆526500

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)。

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.

关 键 词：氮(氧)化物 稀土掺杂 固相反应法 晶体学格位 

分 类 号：O741.3[理学—晶体学]