-
采用高温固相法制备了SrAl2B2O7:Dy3+发光材料.在350 nm紫外光激发下,测得SrAl2B2O7:Dy3+材料的发射光谱为一个多峰宽谱,主峰分别为480,573和678 nm;分别和Dy3+的4F9/2→6H15/2,4F9/2→6H13/2,4F9/2→6H11/2的跃迁发射相对应;监测573 nm的发射峰,得到材料的激发光谱为一个多峰宽谱,主峰分别为295,325,350,365,400 nm.研究了Dy3+掺杂浓度对SrAl2B2O7:Dy3+材料发射光谱的影响,随着Dy3+掺杂浓度的增大,SrAl2B2O7:Dy3+材料的Iy/Ib逐渐增大,根据Judd-Ofelt理论解释了其原因.随着Dy3+掺杂浓度的增大,Dy3+的4F9/2→6H13/2跃迁产生的573 nm发射峰强度先增大,在4%时达到最大值,之后减小,其自身的浓度猝灭机理为电偶极-电偶极相互作用.不同的电荷补偿剂Li+,Na+,K+的引入均使发光强度得到提高,尤其以Li+最佳,发光强度提高了大约33%.The SrAl2B2O7:Dy3+ phosphor is synthesizd through a general high temperature solid-state reaction, and its luminescence properties are investigated. The emission spectrum of SrAl2B2O7:Dy3+ shows the bands at 480nm,573nm and 678nm under the 365nm excitation, corresponding to the 4F9/2→6H15/2,4F9/2→6H13/2 and 4F9/2→6H11/2 typical transitions of Dy3+ respectively. The excitation spectrum for 573nm emission has excitation bands at 295 nm,325 nm,350 nm,365 nm and 400nm. The influence of doped Dy3+ contentration on the emission spectrum and the luminescent intensity of SrAl2B2O7:Dy3+ is investigated. The result shows that the intensity ratio of yellow emission (573nm) to blue emission (483 nm), Iy/Ib, increases with the increase of Dy3+ concentration, which may be explained by the Judd-Ofelt theory. The luminescent intensity increases first with the increase of Dy3+ concentration, then decreases. The concentration self-quenching is attributed to the d-d interaction according to the Dexter theory. The introducing of charge compensation agents of Li+, Na+ and K+ ions can augment the emission intensity. It is found that Li+ ions are the best to enhance the emission intensity.
[1] Yao G Q, Duan J F, Ren M, Yu H D, Lin J H 2001 Chin. J. Lumin. 22 (Suppl) 21
[2] Hu Y S, Zhuang W D, Ye H Q, Wang D H, Zhang S S, Huang X W 2005 J. Alloys. Compd. 390 226
[3] Li X, Yang Z P, Guan L, Guo Q L 2009 Mater. Lett. 63 1096
[4] Yang Z P, Liu Y F 2006 Acta. Phys. Sin. 55 4946 (in Chinese) [杨志平、刘玉峰 2006 55 4946\]
[5] Ma M X, Tu M S, Zhu D C 2009 Acta. Phys. Sin. 58 6512(in Chinese) [马明星、涂铭旌、朱达川 2009 58 6512\]
[6] Yang Z P, Liu Y F, Wang L W, Yu Q M, Xiong Z J, Xu X L 2007 Acta. Phys. Sin. 56 546 (in Chinese ) [杨志平、刘玉峰、王利伟、余泉茂、熊志军、徐小岭 2007 56 546\]
[7] Ofelt G S 1962 J . Chem. Phys. 37 511
[8] Judd B R 1962 Phys. Rev. 127 750
[9] Dexter D L. Schulman J H 1954 J. Chem. Phys. 22 1063
[10] Sun L D, Qian C, Liao C S 2001 J . Solid State Commun. 119 393
[11] Yu X B, Yang L Z,Yang S P 2005 Journal of the Chinese Rare Earth Society 23 533 (in Chinese)[余锡宾、杨良准、杨仕平 2005 稀土学报 23 533]
-
[1] Yao G Q, Duan J F, Ren M, Yu H D, Lin J H 2001 Chin. J. Lumin. 22 (Suppl) 21
[2] Hu Y S, Zhuang W D, Ye H Q, Wang D H, Zhang S S, Huang X W 2005 J. Alloys. Compd. 390 226
[3] Li X, Yang Z P, Guan L, Guo Q L 2009 Mater. Lett. 63 1096
[4] Yang Z P, Liu Y F 2006 Acta. Phys. Sin. 55 4946 (in Chinese) [杨志平、刘玉峰 2006 55 4946\]
[5] Ma M X, Tu M S, Zhu D C 2009 Acta. Phys. Sin. 58 6512(in Chinese) [马明星、涂铭旌、朱达川 2009 58 6512\]
[6] Yang Z P, Liu Y F, Wang L W, Yu Q M, Xiong Z J, Xu X L 2007 Acta. Phys. Sin. 56 546 (in Chinese ) [杨志平、刘玉峰、王利伟、余泉茂、熊志军、徐小岭 2007 56 546\]
[7] Ofelt G S 1962 J . Chem. Phys. 37 511
[8] Judd B R 1962 Phys. Rev. 127 750
[9] Dexter D L. Schulman J H 1954 J. Chem. Phys. 22 1063
[10] Sun L D, Qian C, Liao C S 2001 J . Solid State Commun. 119 393
[11] Yu X B, Yang L Z,Yang S P 2005 Journal of the Chinese Rare Earth Society 23 533 (in Chinese)[余锡宾、杨良准、杨仕平 2005 稀土学报 23 533]
计量
- 文章访问数: 9591
- PDF下载量: 862
- 被引次数: 0
下载:
