Eu^(2+)掺杂MgY_(2)Al_(3)Si_(2)O_(11)N青光荧光粉的制备和发光性能  

Preparation and luminescence properties of Eu^(2+) doped MgY_(2)Al_(3)Si_(2)O_(11)N cyan-emitting light phosphor

作　　者：李莉宇 时秋峰[1] 郭海洁 崔彩娥[1] 黄平[1] 王磊[1] LI Li-Yu;SHI Qiu-Feng;GUO Hai-Jie;CUI Cai-E;HUANG Ping;WANG Lei(School of Physics,Taiyuan University of Technology,Jinzhong,Shanxi 030600,China)

机构地区：[1]太原理工大学物理学院,晋中030600

出　　处：《无机化学学报》2023年第1期63-70,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.12204344);山西省自然科学基金(No.20210302123127);山西省重点研发(R&D)项目基金(No.201903D121097);山西省回国留学人员科研资助项目基金(No.2022-075)资助。

摘　　要：采用高温固相法合成了一系列Eu^(2+)掺杂的MgY_(2)Al_(3)Si_(2)O_(11)N(MYASON)青光荧光粉。详细探讨了不同制备方法对荧光粉的物相结构和发光强度的影响,利用X射线衍射精修和X射线光电子能谱实验证明Si^(4+)-N^(3-)离子对成功掺入石榴石晶格中。通过荧光光谱、寿命衰减曲线和变温光谱研究了发光性能,研究结果表明,用365 nm紫外光激发MYASON∶Eu^(2+)荧光粉时,在青光区域呈现不对称宽带发射,峰值为490 nm,可以为紫外芯片激发的白光发光二极管有效提供青光成分。A series of Eu^(2+)doped MgY_(2)Al_(3)Si_(2)O_(11)N(MYASON) cyan-emitting phosphors were synthesized by a hightemperature solid-state method.The effects of three preparation methods on the phase structure and luminous intensity of phosphor were discussed in detail.By comparing the XRD patterns and fluorescence intensity of samples,it was proved that H_(2)/N_(2) as a reducing atmosphere was conducive to obtaining pure phase and good luminescence properties.X-ray diffraction refinement and X-ray photoelectron spectroscopy proved that Si^(4+)-N^(3-)ion pair was successfully doped into the garnet lattice.The emission spectrum of the sample showed asymmetric broadband emission at 420-750 nm.With the increase of Eu^(2+)doping concentration,the emission intensity of the phosphor was quenched by concentration.The quenching mechanism is electric multipole interaction.In addition,the thermal stability of the sample was studied by variable temperature spectrum,and its activation energy(ΔE) was calculated to be 0.22 eV.The results show that MYASON∶Eu^(2+)phosphor exhibited asymmetric broadband emission in the cyanemitting light region when excited by 365 nm ultraviolet light,and the peak value was 490 nm,which can effectively provide cyan-emitting light components for the white light emitting diode excited by the ultraviolet chip.

关 键 词：光致发光 青光荧光粉 白光发光二极管 石榴石 氮氧化物 

分 类 号：O61[理学—无机化学] TQ422[理学—化学]