摘要
研究了Ce3+在碱金属-碱土金属硼酸盐体系LiCaBO3,LiSrBO3和LiBaBO3中的光谱特性,发现Ce3+在该体系中均呈现非对称的宽谱发射,对应的发射光谱主峰分别为428,436和440 nm;分别监测三个主发射峰,所得激发光谱主峰分别为364、369和370 nm。研究了电荷补偿剂Li+,Na+,K+对3种材料发射强度的影响,结果显示,材料的发射强度明显提高,其中以掺入Li+时效果最明显。
Alkali-alkaline earth borate LiCaBO3 ： Ce^3＋ , LiSrBO3 ： Ce^3＋ and LiBaBO3 ： Ce^3＋ were investigated by solid-state method. CaCO3 （99.9%）, SrCO3 （99.9%）, BaCO3 （99.9%）, Li2CO3 （99.9%）, Na2CO3 （99. 9%）, K2CO3 （99.9%）, H3BO3 （99.9%） and CeO2（99.9%） were used as starting materials, After these individual materials were blended and ground thoroughly in an agate mortar, the homogeneous mixture was heated at 700℃ for 2 h in a reduced atmosphere （5 ： 95（H2/N2））, and these three phosphors were obtained. The excitation and emission spectra of these phosphors were measured by a SHIMADZU RF-540 fluorescence speetrophotometer. The spectral characteristics of Ce^3＋ in alkali-alkaline earth borate LiCaBO3, LiSrBO3 and Lil3aBO3 were investigated. The emission spectra of Ce^3＋ in these three phosphors all exhibited a dissymmetrical band, and the emission peaks were located at 428, 436 and 440 nrn, respectively. The excitation spectra for 428, 436 and 440 nm emission of these three phosphors showed a dissymmetrical band at 364, 369 and 370 nm, respectively. The effects of Li^＋ , Na^＋ and K^＋ on the emission intensities of these three phosphors were studied. The results show that the emission intensities of these phosphors were enhanced, and the maximal emission intensity of doping Li^＋ is higher than that of Na^＋ and K^＋.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2010年第3期735-737,共3页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(50902042)
河北省自然科学基金项目(E2009000209)
河北省教育厅基金项目(2009313)资助
