Structural and Optical Studies of Ho\(^{3+}\)/yb\(^{3+}\) Co-Doped TiO\(^{2}\) Nanoparticles in Silica Glass

S. Rai


The TiO\(_{2}\) nanoparticles doped with Ho\(^{3+}\) and Yb\(^{3+}\) ions were synthesized by sol gel method. The structure of the samples were characterized by XRD, TEM and by thermo gravimetric analysis. The average particle size of the TiO\(_{2}\) range from 7-10 nm (in diameter). The result obtained from TEM, XRD studies indicate that the rare earth ions were positioned in low phonon glass. The photoluminescence (PL) and upconversion (UC) properties of Ho\(^{3+}\) in various concentrations of TiO\(_{2}\) nanoparticles have been investigated. The PL and UC luminescence depends on particle size and crystal structure and we also observed that the emission of Ho\(^{3+}\) in silica xerogel was significantly depends on the amount of TiO\(_{2}\) nanoparticles.


Up conversion; Radiative; Quantum efficiency; TiO\(_2\) nanoparticles; Photoluminescence

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M.-J. Yoon, Journal of Chinese Chemical Society 56 (2009), 449–454.

M. Abdel-Baki, F.A. Abdel-Wahab and F. El-Diasty, J. Applied Physics 111 (2012), 073506–073516.

X. Wang, H. Lin, D. Yang, L. Lin and E.Y. Pun, J. Applied Physics 101 (2007), 113535–113542.

J.W. Shi, J.T. Zheng and P. Wu, J. Hazardous Materials 161 (2009), 416–422.

R. Reisfeld, Materials Science 20 (2002), 5–18.

P.J. Dihingia and S. Rai, J. Luminescence 132 (2012), 1243–1251.

F. Lahoz, I.R. Martin and J.M. Calvilla-Quintero, Appl. Phy. Letter 86 (2005), 51106–51108.

I. Kamma and B. Rama Reddy, J. Appl. Phys. 107 (2010), 113102–11306.

S.J. Kim, S.D. Park and Y.H. Jeong, J. Am. Ceram. 82 (1999), 927–932.

Y. Kayanuma, Phy. Rev. B 38 (1988), 9797–9805.

J.-L. Adman, Chem. Rev. 102 (2002), 2461–2476.

A.A. Reddy, S.S. Babu, K. Pradeesh, C.J. Otton and G.V. Prakash, Journal of Alloys and Compounds 509 (2011), 4047–4052.

P. Dutta and S. Rai, Optik 122 (2011), 858–863.

B.R. Judd, Phy. Rev. 12 (1962), 750–761.

G.S. Ofelt, J. Chem. Phys. 37 (1962), 511–520.



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