Photoluminescence in amorphous PLZ

Intense blue and green photoluminescence emissions at room temperature in barium zirconate powders

“…The origin of green luminescence has been explained and discussed in many papers by different mechanisms, including self-trapped excitons [5], recombination of electron and hole polarons, charge transfer vibronic exciton [6], donor-acceptor recombination [7], transitions in MeO 6 complexes [8] and structurally disordered titanates [9][10][11]. However, few investigations on this phenomenon in zirconates have been reported [12][13][14][15][16]. In particular, the literature reports some works on luminescence of crystalline BaZrO 3 doped with europium [17][18][19].…”

Photoluminescence in the CaxSr1−xWO4 system at room temperature

“…Nevertheless, photoluminescence (PL) was recently observed in disordered perovskite materials in systems such as SrTiO 3 [2,3], CaTiO 3 [4], BaTiO 3 [5], (Ba,Sr)TiO 3 [6], PbTiO 3 [7], LiNbTiO 3 [8], ZrTiO 4 [9,10], which displayed intense PL emission at room temperature, at the visible region. Such discovery raises a great technological interest, once the crystalline systems need high temperatures for preparation, whereas the disordered systems can be obtained at lower temperatures (below 500 1C), thus reducing the processing cost.…”

Photoluminescence in ZrO2 doped with Y and La

“…YSZ Crystals (yttrium-stabilized zirconia) show a tetragonal structure that varies from 200 °C to 1200 °C. Recent studies about zirconate phases show that zirconium is optically active [14]. �owever, systems with yttrium addition do not show optical characteristics.…”