采用溶胶-凝胶法在LaNiO3/Si衬底上制备Er3+掺杂BaTiO3薄膜.通过XRD、AFM和PL图谱分别研究薄膜的晶体结构、形貌以及上转换发光性能.结果表明,薄膜的微观结构和发光性能与Er3+掺杂晶格的位置有关.A位掺杂薄膜较B位掺杂薄膜具有较小的晶格常数和较好的结晶.PL光谱表明:A位掺杂的薄膜和B位掺杂的薄膜都于528 nm和548nm处获得较强的绿色上转换发光以及在673 nm处获得较弱的红光,分别对应Er3+离子的2H11/2→4I15/2,4S3/2→4I15/2和4F9/2→4I15/2能级跃迁.相对于B位掺杂的薄膜,A位掺杂样品有较强的绿光发射积分强度以及较弱的红光发射相对强度.这种差异可以通过薄膜的结晶状况和交叉弛豫机制来进行解释.
Erbium-doped BaTiO3 films on LaNiO3/Si substrates were fabricated by sol-gel method.The crystalline structure,morphologies and upconversion (UC) luminescence properties of films were respectively investigated by X-ray diffraction (XRD),atomic force microcopy (AFM) and photoluminescence (PL).The results indicate that both of the microstructure and luminescence are found to be dependent on Er3+ substituting sites.The samples with A-site substitution have smaller lattice constants,larger grains and smoother surface than those with B-site substitution.The photoluminescence spectra show that both of the samples have two stronger green emission bands centered at 528 and 548 nm and a weak red emission band centered at 673 nm,which correspond to the relaxation of Er3+ from 2H11/2,4S3/2,and 4F9/2 levels to the ground level 4I15/2,respectively.Compared with B-site doped films,A-site doped films have a stronger integrated intensity of green emissions and a weaker relative intensity of red emissions.The differences could be explained by the crystalline quality and cross relaxation (CR) process.
参考文献
| [1] | BLOCK B A;WESSELS B W .Photoluminescence properties of Er3+-doped BaTiO3 thin films[J].Applied Physics Letters,1994,65(01):25-27. |
| [2] | D. M. Gill;G. M. Ford;B. A. Block;Seong-Soo Kim;B. W. Wessels;S. T. Ho .Guided wave absorption and fluorescence in epitaxial Er:BaTiO{sub}3 on MgO[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2000(1):126-128. |
| [3] | 杨旭东,郭海,陈堃,张慰萍,楼立人,尹民.Er3+ Doped BaTiO3 Optical-Waveguide Thin Films Elaborated by Sol-Gel Method[J].稀土学报(英文版),2004(01):36-39. |
| [4] | GILL D M;BLOCK A;CONRAD C W;WESSELS B W HO S T .Thin film channel waveguides fabricated in metal-organic chemical vapor deposition grown BaTiO3 on MgO[J].Applied Physics Letters,1996,69(20):2968-2970. |
| [5] | LIU Y X;PISARRDKI W A;ZENG S J;XU C F YANG Q B .Tri-color upconversion luminescence of rare earth doped BaTiO3 nanocrystals and lowered color separation[J].Optics Express,2009,17(11):9089-9098. |
| [6] | G.Schlaghecken;J.Gottmann;E.W.Kreutz;R.Poprawe .Pulsed laser deposition of Er:BaTiO_3 for planar waveguides[J].Applied physics, A. Materials science & processing,2004(4/6):1255-1257. |
| [7] | Polman A. .Erbium as a probe of everything?[J].Physica. B, Condensed Matter,2001(1/4):78-90. |
| [8] | ZHANG Y;HAG J H;MAK C L;WEI X H .Effects of site substitutions and concentration on Up-conversion luminescence of Er3+-doped perovskite titanate[J].Optics Express,2011,19(03):1824-1829. |
| [9] | Zhang HX.;Zhou Y.;Han XQ.;Buddhudu S.;Xiang Q.;Lam YL.;Chan YC.;Kam CH. .Green upconversion luminescence in Er3+: BaTiO3 films[J].Applied physics letters,2000(5):609-611. |
| [10] | DUNBAR T D;WARREN W L;TUTTLE B A;RANDALL C A TSUR Y .Electro paramagnetic resonance investigations of lanthanidc-doped barium titanate:dopant site occupancy[J].Journal of Physical Chemistry B,2004,108(03):908-917. |
| [11] | TAKSDA K;CHANG E;SMYTH D M .Rare-earth addition to BaTiO3[J].Advanced Ceramics,1987,19:147-152. |
| [12] | MITIC V V;NIKOLIC Z S;PAVLOV[C V B;PAUNOVIC V MILJKOVIC M .Influcnce of rare-earth dopants on barium titanate ceramics microstructure and corresponding electrical properties[J].Journal of the American Ceramic Society,2010,93(01):132-137. |
| [13] | Cheng-Hung Wen;Sheng-Yuan Chu;Yung-Der Juang;Cheng-Kuo Wen .New phase transition of erbium-doped KNbO_3 polycrystalline[J].Journal of Crystal Growth,2005(1/2):179-184. |
| [14] | CHEN L;LIANG X L;LONG Z;WEI X H .Upoonversion photoluminescence properties of Er3+-doped BaxSr1-xTiO3 powders with different phase structure[J].Journal of Alloys and Compounds,2012,516:49-52. |
| [15] | Zhang HX.;Zhou Y.;Han XQ.;Xiang Q.;Buddhudu S.;Lam YL.;Chan YC.;Kam CH. .Photoluminescence at 1.54 mu m in sol-gel-derived, Er-doped BaTiO3 films[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):134-138. |
| [16] | Huang LM;Chen ZY;Wilson JD;Banerjee S;Robinson RD;Herman IP;Laibowitz R;O'Brien S .Barium titanate nanocrystals and nanocrystal thin films: Synthesis, ferroelectricity, and dielectric properties[J].Journal of Applied Physics,2006(3):34316-1-34316-10-0. |
| [17] | JIANG C G;FANG L;SHEN M R;ZHENG F G WU X L .Effects of Eu substituting positions and concentrations on luminescent,dielectric,and magnetic properties of SrTiO3 ceramics[J].Applied Physics Letters,2009,94:071110. |
| [18] | GAO F;WU G H;ZHOU H;BAO D H .Strong up-conversion Iuminescence properties of Yb3+ and Er3+ co-doped Bi4Ti3O12ferroelectric thin films[J].Journal of Applied Physics,2009,106:126104. |
| [19] | Jianhua Hao;S. A. Studenikin;Michael Cocivera .Transient photoconductivity properties of tungsten oxide thin films prepared by spray pyrolysis[J].Journal of Applied Physics,2001(10):5064-5069. |
| [20] | WANG Z L;CHAN H L W;LI H L;HAO J H .Highly efficient low-voltage cathodoluminescence of LaF3:Ln3+ (Ln-Eu3+,Ce3+,Tb3+)spherical particles[J].Applied Physics Letters,2008,93(14):141106. |
| [21] | OKAMOTO E;SEKITA M;MASUI H .Energy transfer between Er3+ ions in LaF3[J].Physical Review B,1975,11:5103-5111. |
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