Contribution of structural order–disorder to the room-temperature photoluminescence of lead zirconate titanate powders

Influence of Structural Disorder on the Photoluminescence Emission of PZT Powders

“…The value gap obtained by theoretical calculus for PZT is 3.03 eV. 10 In this work, the value gap for structural ordered PZT is 3.18 eV.…”

“…10 The disordered powders were annealed in pure alumina crucible at 300°C at three different periods: 4 h (PZT4h), 8 h (PZT8h), and 16 h (PZT16h). The ordered powder was obtained by heat treatment at 700°C for 3 h (PZTc).…”

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

“…Our purpose with the BaZrO 3 -od model is to provide a simple scheme to help in the comprehension of PL emission mechanisms linked to the structural defects of the electronic structure without to suppress completely the geometry of the cell. Using the same distorted model, we have successfully explained the PL emission of several titanates [38][39][40] and zirconates titanates [41][42][43]. The model suggests that the increase of heat treatment temperature reduces the disorder in BaZrO 3 lattice, creating electron-captured oxygen vacancies.…”

Structural refinement and photoluminescence properties of irregular cube-like (Ca1−xCux)TiO3 microcrystals synthesized by the microwave–hydrothermal method

“…In particular, titanium-based perovskite oxides with formula ATiO 3 (A ¼ Pb, Sr, Ba, Zn, Ni, or Fe) presents outstanding potential in electronics [3], gas sensors [4], catalysis [5], memory devices [6], magnetic material [7], and so on. Moreover, the photoluminescence (PL) properties were observed in perovskite-type titanates, such as: (Ba,Ca)TiO 3 [8], Pb(Zr,Ti)O 3 [9], SrTiO 3 [10], and MgTiO 3 [11]. These compounds present broad and intense PL emission at room temperature that can provide the comprehension of energetic levels, defects formation, surface states, which are intrinsically related to its optical response.…”