Intense and broad photoluminescence at room temperature in structurally disordered Ba[Zr0.25Ti0.75]O3 powders: An experimental/theoretical correlation

Dielectric properties, microstructure and diffuse transition of Ni-doped Ba(Zr0.2Ti0.8)O3 ceramics

“…In recent years, most studies are focused on the temperature dependence of the dielectric properties, optical, relaxor behavior and domain structure of BZT materials [9][10][11][12][13][14][15][16][17][18][19][20]. The effect of doping on microstructure and dielectric properties of BZT materials has been extensively studied to further improve their performance [21][22][23][24][25][26][27][28][29][30][31].…”

Red shift and higher photoluminescence emission of CCTO thin films undergoing pressure treatment

“…The perovskite structure can be considered flexible, and most of the distortion on this structure is based on tilting of TiO 6 octahedra which causes a displacement in the 180°angles of O-Ti-O bonds [4]. The disordered structure of the perovskite contributes to PL emission at room temperature; this effect can be observed by exciting the material with wavelengths of higher energy than the band gap [5].…”

“…CCTO is a body-centered cubic (bcc) perovskite; optical properties of this material are due to two main factors: (1) the order-disorder of TiO 6 x [5,14]. (2) Other authors also reported that the CCTO emission could originate from the Ti off-center displacement along h111i directions which is common to TiO 6 clusters [1].…”

Dielectric Properties of Ca0.7Bi0.3Ti0.7Cr0.3O3 (CBTC)–CaCu3Ti4O12 (CCTO) Composite

“…This effect can be observed by exciting the material with wavelengths of higher energy than the band gap. 6 Recently, there has been considerable interest in the dielectric properties of the CaCu 3 Ti 4 O 12 (CCTO) cubic perovskite-related phase. 3,5,[7][8][9] This complex perovskite (CCTO) has been reported as a material having the largest K (16,000-18,000) ever measured in the laboratory at room temperature and remains constant during the temperature range of 100-600 K, suggesting that it is very desirable for practical applications.…”