采用溶胶-凝胶法制备了 Er3+单掺杂A2 Ti2O7(A=La,Y,Gd)和Er3+,Yb3+共掺杂的La2 Ti2O7纳米晶样品.用X射线衍射仪、扫描电子显微镜和紫外-可见-近红外光谱仪分别对样品的结构、形貌和光吸收性质进行了表征;测试了样品在980 nm激光激发下的室温上转换光谱.结果发现,样品都发出了很强的绿光(大约在525和549 nm)和红光(大约660 nm).通过研究这些基质的晶体结构对上转换发光的影响,发现La2 Ti2O7基质中Er3+离子的上转换发射最强.对La2 Ti2O7纳米晶的上转换发光研究表明,Yb3离子能够有效地敏化Er3离子的上转换发射.对上转换发光强度与泵浦功率的依赖分析,发现红光和绿光的发射均属于双光子吸收过程,最后讨论了Er3+和Yb3的上转换发光机制.
参考文献
| [1] | 郭海,董宁,周民杰,尹民,张慰萍,楼立人,夏上达.Er3+ ,Yb3+共掺杂SrTiO3超细粉末的可见上转换发光[J].发光学报,2006(01):53-58. |
| [2] | QIAO Yanmin,GUO Hai.Upconversion properties of Y2O3:Er films prepared by sol-gel method[J].稀土学报（英文版）,2009(03):406-410. |
| [3] | Wei Chen .Nanoparticle Fluorescence Based Technology for Biological Applications[J].Journal of nanoscience and nanotechnology,2008(3):1019-1051. |
| [4] | Yang J H;Zhang L Y;Wen L;Dai S X Hu L L Jiang Z H .Optical transitions and upconversion luminescence of Er3+/Yb3+-codoped halide modified tellurite glasses[J].Journal of Applied Physics,2004,95:3020. |
| [5] | Singh, V;Chakradhar, RPS;Ledoux-Rak, I;Badie, L;Pelle, F;Ivanova, S .Infrared and visible emission of Er3+ in combustion-synthesized CaAl2O4 phosphors[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2009(11):1375-1380. |
| [6] | PangXL;ZhangY;DingLH;SuZH ZhangWF .Upconversion luminescence properties of Er3 +-Bi3 + codoped CaSnO3 nanocrystals with perovskite structure[J].Journal of Nanoscience and Nanotechnology,2010,10:1860. |
| [7] | Vetrone F.;Boyer JC.;Capobianco JA.;Speghini A.;Bettinelli M. .Concentration-dependent near-infrared to visible upconversion in nanocrystalline and bulk Y2O3 : Er3+[J].Chemistry of Materials,2003(14):2737-2743. |
| [8] | Xu H L;Jiang Z K .Dynamics of visible-to-ultraviolet upconversion in YAlO3:1% Er3+[J].Chemical Physics,2003,287:155. |
| [9] | Sun, ZA;Zhang, QH;Li, YG;Wang, HZ .Thermal stable La_2Ti_2O_7:Eu~(3+) phosphors for blue-chip white LEDs with high color rendering index[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(1):338-342. |
| [10] | Li A D;Wang Y J;Huang S;Cheng S Bo J Wu D Ben M N .Effect of in situ applied electric field on the growth of La2Ti2O7 thin films by chemical solution deposition[J].Journal of Crystal Growth,2004,268:198. |
| [11] | Chen GY;Somesfalean G;Liu Y;Zhang ZG;Sun Q;Wang FP .Upconversion mechanism for two-color emission in rare-earth-ion-doped ZrO2 nanocrystals[J].Physical review, B. Condensed matter and materials physics,2007(19):5204-1-5204-6-0. |
| [12] | Babu, P;Seo, HJ;Kesavulu, CR;Jang, YH;Jayasankar, CK .Thermal and optical properties of Er3+-doped oxyfluorotellurite glasses[J].Journal of Luminescence,2009(5):444-448. |
| [13] | Kumar G A;DelaRosa E;Desirena H .Radiative and non radiative spectroscopic properties of Er3 + ion in tellurite glass[J].Optics Communications,2006,260:601. |
| [14] | Ting C C;Chiu Y S;Chang C W;Chuang L C .Visible and infrared luminescence properties of Er3+-doped Y2Ti2O7 nanocrystals[J].Journal of Solid State Chemistry,1984,52:120. |
| [15] | Greedan JE;Gout D;Lozano-Gorrin AD;Derahkshan S;Proffen T;Kim HJ;Bozin E;Billinge SJL .Local and average structures of the spin-glass pyrochlore Y2Mo2O7 from neutron diffraction and neutron pair distribution function analysis[J].Physical review, B. Condensed matter and materials physics,2009(1):014427-1-014427-10-0. |
| [16] | ZHANG Ying,DING Linghong,PANG Xinling,ZHANG Weifeng.Influence of annealing temperature on luminescent properties of Eu~(3+)/V~(5+) co-doped nanocrystalline Gd_2Ti_2O_7 powders[J].稀土学报（英文版）,2009(06):900-904. |
| [17] | Vandenborre M T;Husson E;Chatty J P;Michel D .Rareearth titanates and stannates of pyrochlore structure;vibrational spectra and force fields[J].Journal of Raman Spectroscopy,1983,14:63. |
| [18] | Porter-Chapman Y;Bourret-Courchesne E;Derenzo SE .Bi3+ luminescence in ABiO(2)Cl (A = sr, ba) and BaBiO2Br[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2008(1):87-91. |
| [19] | 李艳红,张永明,张扬,洪广言,于英宁.GdF3：Er3+Yb3+的合成和上转换发光特性[J].无机化学学报,2008(10):1675-1678. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%