[[1] Almeida R.M., Rodrigues A.S., J. Non-Cryst. Solids, 326–327 (2003), 405. http://dx.doi.org/10.1016/S0022-3093(03)00447-210.1016/S0022-3093(03)00447-2]Search in Google Scholar
[[2] Que W., Hu X., Applied Phys., B88 (2007), 557. 10.1007/s00340-007-2715-6]Search in Google Scholar
[[3] Han Y., Lin J., Zhang H., Materials Letters, 54 (2002), 389. http://dx.doi.org/10.1016/S0167-577X(01)00599-710.1016/S0167-577X(01)00599-7]Search in Google Scholar
[[4] Gonc, Alves R.R., Messaddeq Y., Atik M., Ribeiro S.J.L., Materials Research, 2 (1999), 11. ]Search in Google Scholar
[[5] Kłonkowski A.M., Grobelna B., But S., Lis S., J. Non-Cryst. Solids, 352 (2006), 2213. http://dx.doi.org/10.1016/j.jnoncrysol.2006.02.05010.1016/j.jnoncrysol.2006.02.050]Search in Google Scholar
[[6] Tanner P.A., Yan B., Zhang H., J. Mater. Sci., 35 (2000), 4325. http://dx.doi.org/10.1023/A:100489252050210.1023/A:1004892520502]Search in Google Scholar
[[7] Reisfeld R., Jørgensen C.K., Lasers and Exited states of Rare Earths, Springer-Verlag, Berlin, 1977. http://dx.doi.org/10.1007/978-3-642-66696-410.1007/978-3-642-66696-4]Search in Google Scholar
[[8] Binnemans K., Chem. Rev., 109 (2009), 4283. http://dx.doi.org/10.1021/cr800398310.1021/cr8003983]Search in Google Scholar
[[9] Minh L.Q., Huong N.T., Barthou C., Benalloul P., Stręk W., Anh T.K., Materials Science, 20 (2002), 47. ]Search in Google Scholar
[[10] Yan B., Materials Letters, 57 (2003), 2535. http://dx.doi.org/10.1016/S0167-577X(02)01307-110.1016/S0167-577X(02)01307-1]Search in Google Scholar
[[11] Schraml-Marth M., Walther K.L., Wokaun A., Handy B.E., Baiker A., J. Non-Cryst. Solids, 143 (1992), 93. http://dx.doi.org/10.1016/S0022-3093(05)80557-510.1016/S0022-3093(05)80557-5]Search in Google Scholar
[[12] Song C.F., Lü M.K., Yang P., Xu D., Yuan D.R., Thin Solid Films, 413 (2002), 155. http://dx.doi.org/10.1016/S0040-6090(02)00440-610.1016/S0040-6090(02)00440-6]Search in Google Scholar
[[13] Fox A.M., Optical Properties of Solids, Oxford University Press, Great Britain, 2003. ]Search in Google Scholar
[[14] Reisfeld R., Saraidov Ts., Gaft M., Pietraszkiewicz M., Pietraszkiewicz O., Bianketti S., Optical Materials, 24 (2003), 1. http://dx.doi.org/10.1016/S0925-3467(03)00098-310.1016/S0925-3467(03)00098-3]Search in Google Scholar
[[15] Reisfeld R., Saraidov Ts., Levchenko V., J. Sol- Gel Technol., 50 (2009), 194. http://dx.doi.org/10.1007/s10971-009-1892-710.1007/s10971-009-1892-7]Search in Google Scholar
[[16] Li H.R., Fu L.S., Lin J., Zhang H.J., Thin Solid Films, 416 (2002), 197. http://dx.doi.org/10.1016/S0040-6090(02)00291-210.1016/S0040-6090(02)00291-2]Search in Google Scholar
[[17] Zhao Li-Min, Yan B., Materials Research Bulletin, 41 (2006), 1. http://dx.doi.org/10.1016/j.materresbull.2005.08.00510.1016/j.materresbull.2005.08.005]Search in Google Scholar
[[18] Reisfeld R., Optical Materials, 32 (2010), 850. http://dx.doi.org/10.1016/j.optmat.2010.04.03410.1016/j.optmat.2010.04.034]Search in Google Scholar
[[19] Bian Li-J., Qian Xue-F., Yin J., Zhu Zi-Kang, Lu Qing-Hua, Materials Science and Engineering, B100 (2003), 53. 10.1016/S0921-5107(03)00069-2]Search in Google Scholar
[[20] Chen B., Xu J., Liang H., Zheng Z., Zhang Q., J. Optoelectronics, Advanced Mater., 7 (2005), 6, 2991. ]Search in Google Scholar
[[21] Xie F., Zheng Z., Physica B, 349 (2004), 415. http://dx.doi.org/10.1016/j.physb.2004.04.07010.1016/j.physb.2004.04.070]Search in Google Scholar
[[22] Gunzler H., Gremlich H.-U., IR Spectroscopy - An Introduction, Wiley-vch, Weinheim, 2002. ]Search in Google Scholar
[[23] Primeau N., Vautey C., Langlet M., Thin Solid Films, 310 (1997), 47. http://dx.doi.org/10.1016/S0040-6090(97)00340-410.1016/S0040-6090(97)00340-4]Search in Google Scholar
[[24] Jitianu A., Britchi A., Deleanu C., Badescu V., Zaharescu M., J. Non-Cryst. Solids, 319 (2003), 263. http://dx.doi.org/10.1016/S0022-3093(03)00007-310.1016/S0022-3093(03)00007-3]Search in Google Scholar
[[25] Que W., Sun Z., Zhou Z., Lam Y.L., Chan Y.C., Kam C.H., Thin Solid Films, 359 (2000), 177. http://dx.doi.org/10.1016/S0040-6090(99)00746-410.1016/S0040-6090(99)00746-4]Search in Google Scholar
[[26] Liu F., Fu L., Wang J., Liu Z., Li H., Zhang H., Thin Solid Films, 419 (2002), 178. http://dx.doi.org/10.1016/S0040-6090(02)00734-410.1016/S0040-6090(02)00734-4]Search in Google Scholar
[[27] Bian L-J., Qian X-F., Yin J., Zhu Z-K., Lu Q-H., Mater. Sci. Engineering, B100 (2003), 53. http://dx.doi.org/10.1016/S0921-5107(03)00069-210.1016/S0921-5107(03)00069-2]Search in Google Scholar
[[28] Luo X., Zha C., Luther-Davies B., J. Non-Cryst. Solids, 351 (2005), 29. http://dx.doi.org/10.1016/j.jnoncrysol.2004.09.00110.1016/j.jnoncrysol.2004.09.001]Search in Google Scholar
[[29] Martins O., Almeida R.M., J. Sol-Gel Sci. Technol., 19 (2000), 651. http://dx.doi.org/10.1023/A:100878591708410.1023/A:1008785917084]Search in Google Scholar
[[30] Smith D.Y., Black C.E., Homes C.C., Shiles E., Phys. Stat. Sol. (c), 4 (2007), 838. http://dx.doi.org/10.1002/pssc.20067384710.1002/pssc.200673847]Search in Google Scholar
[[31] Beck C., Mallat T., Bü Rgi A., Baiker A., J. Catal., 204 (2001), 428. http://dx.doi.org/10.1006/jcat.2001.340710.1006/jcat.2001.3407]Search in Google Scholar
[[32] Bihuniak P.P., Condrate R.A., J. Non-Cryst. Solids, 44 (1981), 331. http://dx.doi.org/10.1016/0022-3093(81)90036-310.1016/0022-3093(81)90036-3]Search in Google Scholar
[[33] Lee D.-H., Kim J.-W., Suh K.D., J. Mater. Sci., 35 (2000), 6181. http://dx.doi.org/10.1023/A:102677300943610.1023/A:1026773009436]Search in Google Scholar
[[34] Zhou S., Wu L., Shen W., Gu G., J. Mater. Sci., 39 (2004), 1593. http://dx.doi.org/10.1023/B:JMSC.0000016157.19241.5710.1023/B:JMSC.0000016157.19241.57]Search in Google Scholar
[[35] Boonstra A.H., Meeuwsen T.P.M., Baken J.M.E., Aben G.V.A., J. Non-Cryst. Solids, 109 (1989), 153. http://dx.doi.org/10.1016/0022-3093(89)90027-610.1016/0022-3093(89)90027-6]Search in Google Scholar
[[36] Duer M.J. (Ed.), Solid State NMR Spectroscopy Principles, Applications, Blackwell Science Ltd, Cambridge, London, 2002. 10.1002/9780470999394]Search in Google Scholar
[[37] Scott R.A., Lukehard Ch.M. (Editors), Application of Physical Methods to Inorganic, Bioorganic Chemistry, J. Wiley&Sons Ltd., Barcelona, 2007. ]Search in Google Scholar
[[38] Gaft M., Reisfeld R., Panczer G., Luminescence Spectroscopy of Minerals, Materials, Springer-Verlag, Berlin, Heidelberg, New York, 2005. ]Search in Google Scholar
[[39] Han Y., Lin J., J. Solid State Chemistry, 171 (2003), 396. http://dx.doi.org/10.1016/S0022-4596(02)00220-710.1016/S0022-4596(02)00220-7]Search in Google Scholar
[[40] Huang Y.L., Zhu W.L., Feng X.Q., Man Z.Y., J. Solid State Chemistry, 172 (2003), 188. http://dx.doi.org/10.1016/S0022-4596(03)00013-610.1016/S0022-4596(03)00013-6]Search in Google Scholar
[[41] Ropp R.C., Luminescence, Solid State, 2nd ed., Elsevier, Amsterdam, 2004. ]Search in Google Scholar
[[42] Song Ch.F., Lü M.K., Yang P., Gu F., Xu D., Yuan D.R., Mater. Sci. Engineering, B94 (2002), 181. http://dx.doi.org/10.1016/S0921-5107(02)00070-310.1016/S0921-5107(02)00070-3]Search in Google Scholar
[[43] Gschneidner K.A. Jr., Eyring L., (Editors), Handbook of the Physics, Chemistry of Rare Earths, vol. 28, North-Holland Elsevier Science B.V., Amsterdam 2000. ]Search in Google Scholar
[[44] Gutzov S., Bredol M., Mater. Sci., 41 (2006), 1835. http://dx.doi.org/10.1007/s10853-005-2184-410.1007/s10853-005-2184-4]Search in Google Scholar
[[45] Nachimuthu P., Jagannathan R., Kumar V. N., Ra D. N., Non-Cryst. Solids, 217 (1997), 215. http://dx.doi.org/10.1016/S0022-3093(97)00151-810.1016/S0022-3093(97)00151-8]Search in Google Scholar
[[46] Reisfeld R., Boehm L., J. Solid State Chem., 4,3, (1972), 417. http://dx.doi.org/10.1016/0022-4596(72)90157-010.1016/0022-4596(72)90157-0]Search in Google Scholar
[[47] Padlyak B., Ryba-Romanowski W., Lisiecki R., Optica Applicata, 38(1), (2008), 198. ]Search in Google Scholar
[[48] Gedam S.C., Dhoble S.J., Moharil S.V., J. Lumin., 128 (2008), 1. http://dx.doi.org/10.1016/j.jlumin.2007.03.02310.1016/j.jlumin.2007.03.023]Search in Google Scholar
[[49] Kaczmarek S.M., Opt. Mat., 19 (2002), 189.. http://dx.doi.org/10.1016/S0925-3467(01)00218-X10.1016/S0925-3467(01)00218-X]Search in Google Scholar
[[50] Zhang H., Dai H., Liu Y., Deng J., Zhang L., Ji K., Mater. Chem. Phys., 129 (2011), 586. http://dx.doi.org/10.1016/j.matchemphys.2011.04.07310.1016/j.matchemphys.2011.04.073]Search in Google Scholar
[[51] Yu M., Lin J., Fu J., Han Y.C., Chem. Phys. Lett., 371 (2003), 178. http://dx.doi.org/10.1016/S0009-2614(03)00239-210.1016/S0009-2614(03)00239-2]Search in Google Scholar
[[52] Kim S., Rooh G., Kim H.J., Park H., Kim D.S., U H., Kang S.J., Progress in Nuclear Sci. Technol., 1 (2011), 275. 10.15669/pnst.1.275]Search in Google Scholar
[[53] Gedam S.C., Dhoble S.J., Moharil S.V., J. Lumin., 121 (2006), 450. http://dx.doi.org/10.1016/j.jlumin.2005.11.00710.1016/j.jlumin.2005.11.007]Search in Google Scholar
[[54] Mareš J., Czech. J. Phys., B 35 (1985) 883. http://dx.doi.org/10.1007/BF0195945610.1007/BF01959456]Search in Google Scholar
[[55] Que W., Hu X., Chem. Phys. Lett., 397 (2004), 227. http://dx.doi.org/10.1016/j.cplett.2004.01.13010.1016/j.cplett.2004.01.130]Search in Google Scholar
[[56] Puchalska M., Gerasymchuk Y., Zych E., Opt. Mater., 32 (2010), 1117. http://dx.doi.org/10.1016/j.optmat.2010.03.01210.1016/j.optmat.2010.03.012]Search in Google Scholar
[[57] Zhou B., Zhou Y., Lam Y.L., Chan C.Y., Kam C.H., Cheng S.D., Buddhudu S., Opt. Commun., 182, (2000), 151. http://dx.doi.org/10.1016/S0030-4018(00)00764-110.1016/S0030-4018(00)00764-1]Search in Google Scholar
[[58] Mukherjee S., Sudarsan V., Vatsa R.K., Tyagi A.K., J. Lumin., 129 (2009), 69. http://dx.doi.org/10.1016/j.jlumin.2008.08.00310.1016/j.jlumin.2008.08.003]Search in Google Scholar
[[59] Oh E.O., Kim Y.H., Whang C.M., J. Electroceram., 17 (2006), 335. http://dx.doi.org/10.1007/s10832-006-7986-510.1007/s10832-006-7986-5]Search in Google Scholar
[[60] Tsvirko M.P., Kiriyak A.V., Meshkova S.B., J. Appl. Spectroscopy, 74 (2007), 3, 364. http://dx.doi.org/10.1007/s10812-007-0059-y10.1007/s10812-007-0059-y]Search in Google Scholar
[[61] Schotter G., Chem. Mater., 13 (2001), 3422. http://dx.doi.org/10.1021/cm011060m10.1021/cm011060m]Search in Google Scholar
[[62] Matsuura Y., Miura S., Naito H., Inoue H., Matsukawa K., J. Organomet. Chem., 685 (2003), 230. http://dx.doi.org/10.1016/S0022-328X(03)00644-210.1016/S0022-328X(03)00644-2]Search in Google Scholar
[[63] Sheng K., Yan B., J. Photochem. Photobiol. A: Chem., 177 (2006), 1. http://dx.doi.org/10.1016/j.jphotochem.2005.02.02110.1016/j.jphotochem.2005.02.021]Search in Google Scholar
[[64] Guo J., Fu L., Li H., Zheng Y., Meng Q., Wang S., Liu F., Wang J., Zhang H., Mater. Lett., 57 (2003), 3899. http://dx.doi.org/10.1016/S0167-577X(03)00237-410.1016/S0167-577X(03)00237-4]Search in Google Scholar
[[65] Li Y., Zhao Y., J. Fluoresc., 19 (2009), 641. http://dx.doi.org/10.1007/s10895-008-0456-510.1007/s10895-008-0456-5]Search in Google Scholar
[[66] Bian Li-J., Qian Xue-F., Yin J., Zhu Zi-K., Lu Qing-H., Mater. Sci. Eng., B100 (2003), 53. http://dx.doi.org/10.1016/S0921-5107(03)00069-210.1016/S0921-5107(03)00069-2]Search in Google Scholar
[[67] Qiao X-F., Yan B., Eur. Polymer J., 45 (2009), 2002. http://dx.doi.org/10.1016/j.eurpolymj.2009.04.00710.1016/j.eurpolymj.2009.04.007]Search in Google Scholar
[[68] Wang F-F., Yan B., J. Photochem. Photobiology A: Chemistry, 194 (2008), 238. http://dx.doi.org/10.1016/j.jphotochem.2007.08.01610.1016/j.jphotochem.2007.08.016]Search in Google Scholar
[[69] Matsuura Y., Miura S., Naito H., Inoue H., Matsukawa K., J. Organomet. Chem., 685 (2003), 230. http://dx.doi.org/10.1016/S0022-328X(03)00644-210.1016/S0022-328X(03)00644-2]Search in Google Scholar
[[70] Cordoneillo E., Escribano P., Guaita F.J., Philippe C., Viana B., Sanchez C., J. Sol-Gel Sci. Technol., 24 (2002), 155. http://dx.doi.org/10.1023/A:101520422734710.1023/A:1015204227347]Search in Google Scholar