NaBaPO_4∶Eu^(3+),Yb^(3+)的近红外下转换机制  

Near-infrared Down-conversion Mechanism of NaBaO_4∶Eu^(3+),Yb^(3+)

作　　者：谌基兴 林林[1,2] 朱晓娟[1,2] 林慧[1,2] 王哲哲[1,2] 冯卓宏[1,2] 郑志强[1,2] 

机构地区：[1]福建师范大学物理与能源学院,福州350007 [2]福建省量子调控与新能源材料重点实验室,福州350007

出　　处：《人工晶体学报》2014年第12期3169-3174,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金青年基金(11204039;51202033);福建省教育厅资助项目(JK2011008);福建省教育厅A类科技项目(JA13084)

摘　　要：采用固相法制备了掺杂Eu3+,Yb3+的Na Ba PO4下转换荧光粉。在394 nm紫外光激发Eu3+下,获得了对应于Yb3+:2F7/2→2F5/2发射的1004 nm的近红外光。测量了样品的可见和近红外荧光光谱以及Eu3+的衰减曲线,验证了Eu3+到Yb3+的能量传递。观测到了样品的下转换过程,并未观测到量子剪裁现象。研究表明:Yb3+的荧光强度和能量传递效率随着Yb3+掺杂浓度的变化而变化,当样品中Eu3+,Yb3+的掺杂浓度都为5%时,具有最强的近红外发光,Eu3+到Yb3+的能量传递效率为67.9%。Eu3 ＋and Yb3 ＋co-doped Na Ba PO4down-conversion phosphors were prepared by the solid state reaction. Upon excitation of Eu3 ＋at 394 nm,emissions of near-infrared（ NIR） photons at 1004 nm corresponding to2F7 /2→2F5 /2of Yb3 ＋were achieved. The luminescent spectra invisible and NIR regions and decay lifetime curves of Eu3 ＋were measured. The results prove the energy transfer from Eu3 ＋to Yb3 ＋. However,quantum cutting phenomenon were not observed. The fluorescence intensity of Yb3 ＋and energy transfer efficiency varied with different Yb3 ＋doping concentrations. When doping concentration of Eu3 ＋and Yb3 ＋were both 5%,the NIR luminescent was the strongest and the energy transfer efficiency of Eu3 ＋to Yb3 ＋was 67. 9%.

关 键 词：NaBaPO4 下转换 能量传递 近红外 

分 类 号：O482.31[理学—固体物理]