Bi^(3+)激活石榴石蓝青光发光材料的发光性能  

Photoluminescence Properties of Bi^(3+)-activated Garnet Blue-cyan Luminescent Materials

作　　者：邓文杰 王海怡 黄得财 彭家庆 叶信宇[1,3,4] DENG Wenjie;WANG Haiyi;HUANG Decai;PENG Jiaqing;YE Xinyu(School of Rare Earths,Jiangxi University of Science and Technology,Ganzhou 341000,China;School of Materials and Energy,Yunnan University,Kunming 650091,China;National Rare Earth Functional Materials Manufacturing Innovation Centre,Ganzhou 341000,China;Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学稀土学院,江西赣州341000 [2]云南大学材料与能源学院,云南昆明650091 [3]国家稀土功能材料创新中心,江西赣州341000 [4]江西理工大学国家市场监管稀土产品检测溯源重点实验室,江西赣州341000

出　　处：《发光学报》2025年第3期486-495,共10页Chinese Journal of Luminescence

基　　金：国家重点研发计划(2023YFB3506602);国家自然科学基金(12274409);江西省自然科学基金项目(20224BAB201028,20232ACB211006);云南省电磁材料与器件重点实验室(筹)资助课题(ZZ2024002)。

摘　　要：蓝青光发光材料在实现荧光粉转换型LED全光谱光源中发挥着重要作用。本文采用高温固相法制备了Bi^(3+)掺杂石榴石结构的固溶体发光材料GdSr_(2)ScMgGe_(3)O_(12)。通过XRD结构精修、元素分析、光致光谱等表征对材料结构、组成和发光性能进行了全面分析。GdSr_(2)ScMgGe_(3)O_(12)∶Bi^(3+)能够在紫外光-紫光范围内有效激发,分别表现出近紫外光发射(λ_(em)=340 nm)和宽带蓝青光发射(λ_(em)=480 nm)。并且对Bi^(3+)的发光跃迁机理进行了阐述。结合材料的结构和发光特性得出Bi^(3+)在该固溶体材料中同时占据[Sr/GdO_(8)]和[Sc/MgO_(6)],重点分析了Bi^(3+)占据[Sc/MgO_(6)]格位的蓝青光发射行为,并对材料的发光效率和荧光热稳定性进行了评估。最后,将制备的蓝青色荧光材料应用于WLED的封装,获得了具有低色温(CCT=3761 K)和高显色指数(CRI=92.3)的低蓝光全光谱WLED。Blue-cyan phosphors play an important role in the development of full-spectrum phosphor-conversion white LED(pc-WLED).Herein,a Bi^(3+)doped garnet structure solid solution material GdSr_(2)ScMgGe_(3)O_(12) was pre-pared by the high-temperature solid-state method.The structure,composition and photoluminescence(PL)proper-ties of the materials were analyzed thoroughly through the XRD structure refinement,elemental analysis and PL spec-tra.GdSr_(2)ScMgGe_(3)O_(12)∶Bi^(3+)can be effectively excited in the ultraviolet-violet range,exhibiting near-UV emission(λ_(em)=340 nm)and broadband blue-cyan emission(λ_(em)=480 nm),respectively.Moreover,the transition mecha-nism of Bi^(3+)ions were studied.Bi^(3+)ions occupied both[Sr/GdO_(8)]and[Sc/MgO_(6)]sites in the host based on the struc-ture and PL characteristic.The blue-cyan emission behavior of Bi^(3+)ions in[Sc/MgO_(6)]sites was analyzed,and the PL efficiency and thermal stability of the phosphors were evaluated.Finally,a full-spectrum pc-LED was manufac-tured by using the optimal blue-cyan phosphor with UV LED chip,and the device shows a low correlation color tem-perature(CCT=3761 K)and high color rendering index(CRI=92.3).

关 键 词：Bi^(3+)掺杂 全光谱照明 WLED 青色发光材料 

分 类 号：O482.31[理学—固体物理]