井冈山大学学报（自然科学版）2025，Vol.46Issue(6)：10-16,7.DOI:10.3969/j.issn.1674-8085.2025.06.002
Bi3+掺杂K4(Sr,Ca)Ge3O9窄带荧光粉的发光性能调控研究
Tunable luminescence properties of narrow-band-emitting K4(Sr,Ca)Ge3O9 phosphors doped with Bi3+ions
摘要
Abstract
In this paper,K4SrGe3O9:xBi3+(0≤x≤0.01)and K4Sr(1-y)CayGe3O9:0.002Bi3+(0≤y≤1)series of phosphors were prepared by high-temperature solid-phase method,and the structure and luminescence performance of the phosphors were investigated by means of X-ray diffraction,fluorescence spectra,fluorescence decay curves,and X-ray excitation and emission spectra.The results show that the K4SrGe3O9:xBi3+phosphor has an optimal doping concentration of x=0.002 under 313 nm excitation,with the emission peak position located at 363 nm,the corresponding width at half maximum of the narrow-band emission peak of 45 nm,and a fluorescence decay time of 540 ns.Based on this,the K4Sr(1-y)CayGe3O9:0.002Bi3+phosphor was prepared by gradually replacing Sr2+by Ca2+.Under this substitution,due to the crystal shrinkage effect of the substituted sample,the main peak of the XRD diffraction peak is shifted by 0.46° to the high angle,and the width of the half-peak of the substituted emission peak(about 48 nm)is observed due to the local symmetry failure of the substitution and the fluctuation of the incompletely substituted components.Through the discussion of the structure,this paper once again confirms the need for narrowband luminescence for high-symmetry structures.The results in this paper provide the experimental research basis and scientific basis for the future preparation of narrowband luminescent phosphors by doping in crystals with high symmetry structure.关键词
Bi3+掺杂/K4(Sr,Ca)Ge3O9/窄带发光/高对称晶体结构/LEDKey words
Bi3+doped/K4(Sr,Ca)Ge3O9/narrow emission/highly symmetric crystal structure/LED分类
物理学引用本文复制引用
温润祺,张晨曦,勾庆东,余美东,刘建蒂,孙心瑗..Bi3+掺杂K4(Sr,Ca)Ge3O9窄带荧光粉的发光性能调控研究[J].井冈山大学学报（自然科学版）,2025,46(6):10-16,7.基金项目
国家自然科学基金项目(12065010) （12065010）
江西省教育厅科技计划项目(GJJ2201620) （GJJ2201620）
国家级大学生创新创业训练计划项目(202510419017) （202510419017）
江西省大学生创新创业训练计划项目(S202510419046) （S202510419046）
