Red photoluminescence in praseodymium-doped titanate perovskite films epitaxially grown by pulsed laser deposition

Intense red photoluminescence (PL) under ultraviolet (UV) excitation was observed in epitaxially grown Pr-doped Ca0.6Sr0.4TiO3 perovskite films. The films were grown on SrTiO3 (100) substrates by pulsed laser deposition, and their epitaxial growth was confirmed by x-ray diffraction and reflected high-energy electron diffraction. The observed sharp PL peak centered at 610nm was assigned to the transition of Pr3+ ions from the D21 state to the H43 state. The PL intensity was markedly enhanced by postannealing treatments at 1000°C, above the film-growth temperature of 600 or 800°C. Because the excitation and absorption spectra are similar to each other, it was suggested that the UV energy absorbed by the host lattice was transferred to the Pr ions, resulting in the red luminescence.

[1]  Y. Nakachi,et al.  Green, Orange, and Magenta Luminescence in Strontium Stannates with Perovskite-Related Structures , 2006 .

[2]  Ying-liang Liu,et al.  Synthesis and luminescent properties of a new green afterglow phosphor CaSnO3:Tb , 2005 .

[3]  Norihiko Sakamoto,et al.  Photoluminescence Properties of Pr-Doped (Ca,Sr,Ba)TiO3 , 2005 .

[4]  T. Katsumata,et al.  Photoluminescence of Praseodymium-Doped Srn+1TinO3n+1 (n=1, 2, ∞) , 2005 .

[5]  H. Mizoguchi,et al.  Strong near-infrared luminescence in BaSnO3. , 2004, Journal of the American Chemical Society.

[6]  A. Shoji,et al.  Preparation of parallel capacitor of epitaxial SrTiO3 film with a single-crystal-like behavior , 2003 .

[7]  H. Koinuma,et al.  Combinatorial fabrication and cathodoluminescence properties of composition spread MHfO3:Tm3+(M = Ca, Sr and Ba) films , 2002 .

[8]  Hajime Yamamoto,et al.  Host-to-activator energy transfer in a new blue-emitting phosphor SrHfO3 : Tm3+ , 2000 .

[9]  K. Tamura,et al.  A New Red-Emitting Phosphor, SrTiO3:Pr3+, for Low-Voltage Electron Excitation , 1999 .

[10]  D. Norton,et al.  Enhanced photoluminescence in epitaxial ZnGa2O4:Mn thin-film phosphors using pulsed-laser deposition , 1999 .

[11]  H. Hosono,et al.  Vacuum ultraviolet reflectance and electron energy loss spectra of , 1998 .

[12]  Philippe Boutinaud,et al.  Red Luminescence in Pr3+‐Doped Calcium Titanates , 1997 .

[13]  S. S. Chadha,et al.  New Electron Excited Light Emitting Materials , 1993, [Proceedings] IVMC '93 Sixth International Vacuum Microelectronics Conference.

[14]  M. Cardona.  Optical Properties and Band Structure of SrTiO 3 and BaTiO 3 , 1965 .