| Abstract |
Background. As it is known, the impurities of rare earth elements can have a significant impact on the luminescent-kinetic characteristics of phosphors. We have studied the impact of Pr3+, Tm3+ and Ho3+ ion impurity on IR luminescence of polydisperse solid solutions of Y1 xYbxAl3(BO3)4 in the wavelength range of
960–1100 nm.
Materials and methods. To determine the effects of Pr3+, Tm3+ and Ho3+ ion impurities on IR luminescence of polydisperse solid solutions Y1 xYbxAl3(BO3)4 by laser excitation with the wavelength range of 940–980 nm, we synthesized and investigated the following concentration series: Y0,85 xYb0,15PrxAl3(BO3)4 (0 ≤ х ≤ 0,01), Y0,85 xYb0,15TmxAl3(BO3)4 (0 ≤ х ≤ 0,1), Y0,85 xYb0,15HoxAl3(BO3)4 (0 ≤ х ≤ 0,1). The analysis of the energy structures of ytterbium, praseodymium, thulium and holmium has been conducted.
Results. Pr3+, Tm3+ and Ho3+ ion impurities have a marked effect on the IR luminescence of polydisperse solid solutions of Y1 xYbxAl3(BO3)4. These impurities are IR luminescence quenchers. Pr3+ion impurity exercises the strongest influence. Their concentration of 0.01 atomic fraction brings about the 10-time decline of IR luminescence intensity in the wavelength range of 960–1100 nm.
Conclusions. On the basis of the analysis of the experimental curves and energy structures of ytterbium, praseodymium, thulium, holmium, mechanisms of energy transfer from ytterbium ions to impurity ions have been proposed. The main channels of energy transfer are the following: Yb3+ (2F5/2) → Рr3+ (1G4), Yb3+ (2F5/2) → Tm3+ (3H5), Yb3+ (2F5/2) → Но3+ (5I6).
|
| References |
1. Rytz D., Gross A., Vernay S., Wesemann V. Proceedings-spie the international society for optical engineering. 2008, vol. 6998, pp. 699814-1–12.
2. Dominiak-Dzik G., Ryba-Romanowski W., Lisiecki R., Főld-vári I., Beregi E. Optical Materials. 2009, vol. 31, iss. 6, pp. 989–994.
3. Boldyrev K. N., Popova M. N., Bezmaternykh L. N., Bettinelli M. Kvantovaya elektronika [Quantum electronics]. 2011, vol. 41, no. 2, pp. 120–124.
4. Kostyukov S. V., Manashirov O. Ya., Vorob'ev V. A. Vestnik Severo-Kavkazskogo gosudarstvennogo tekhnicheskogo universiteta [Bulletin of North Caucasus State Technical University].2012, no.4 (33), pp.15–18.
5. Boldyrev K. N. Spektroskopicheskoe issledovanie redkozemel'nykh alyuminievykh i khromovykh boratov so strukturoy khantita: avtoref. dis. kand. fiz.-mat. nauk [Spectro¬scopic research of rare-earth aluminum and chrome borates with huntite structure: author’s abstract of dissertation to apply for the degree of the candidate of physical and mathematical sciences]. Troitsk, 2011, 28 p.
6. Liu J., Mateos X., Zhang H., Li J., Wang J., Petrov V. Journal of Quantum Electronics. 2007, vol. 43, no. 5, pp. 385–390.
7. Li J., Wang J., Tan H., Cheng X., Song F., Zhang H., Zhao Sh. Journal of Crystal Growth. 2003,vol. 256, iss. 3–4, pp. 324–327.
8. Bartl M. H., Gatterer K., Cavalli E., Speghini A., Bettinelli M. Spectrochimica Acta Part A. 2001, vol. 57, pp. 1981–1990.
9. Kuck S., Diening A., Heumann E., Mix E., Sandrock T., Sebald K., Huber G. Journal of Alloys and Compounds. 2000, vol. 300, 301, pp. 65–70.
10. Jaque D., Ramirez M. O., Bausa L. E., Sole J. G., Cavalli E., Spheghini A., Betinelli M. Physical Review B. 2003, vol. 68, iss. 3, pp. 035118-1–9.
11. Sokolov A. E. Magnitnyy krugovoy dikhroizm i opticheskaya spektroskopiya iona Tm3+ v monokristalle TmAl3(BO3)4: avtoref. dis. kand. fiz.-mat. nauk [Magnet circular dichroism and optical spectroscopy of Tm3+ ion in TmAl3(BO3)4 single crystal: author’s abstract of dissertation to apply for the degree of the candidate of physical and mathe-matical sciences]. Krasnoyarsk, 2010, 23 p.
12. Baraldi A., Capelletti R., Mazzera M., Magnani N., Földvári I., Beregi E. Physical Re-view B. 2007, vol. 76, iss. 16, p. 165130.
|
