Growth and characterization of pure and Pr3+-doped Cs4PbBr6 crystals

Inducing Isotropic Growth in Multidimensional Cesium Lead Halide Perovskite Nanocrystals

“…Spherical 0D Cs 4 PbX 6 NCs were synthesized through subsequent injection of the Cs‐oleate precursor into a solution containing PbX 2 seeds at reaction temperatures below 110 °C. A sharp excitonic absorption peak at 313 nm and a corresponding PL emission at 378 nm (FWHM≈65 nm) were observed in Cs 4 PbBr 6 NCs (Figure e), which corroborate well with reported literature values . XRD analysis confirmed the formation of a 0D phase with trigonal crystal symmetry (space group R c ), in which isolated [PbX 6 ] 4− octahedra are surrounded by Cs + cations.…”

Probing molecule-like isolated octahedra via phase stabilization of zero-dimensional cesium lead halide nanocrystals

“…Upon Mn incorporation, the Bragg’s peak at 23° monotonically shifts to higher 2 θ , suggesting the substitution of Pb 2+ with smaller Mn 2+ ion in Cs 4 PbX 6 (X = Br, Br/Cl, Cl), which is also evidenced from the decrease in lattice parameters (Table 1, Supplementary Tables 2 to 4) 24,25 . Lattice contraction of 0.3% and volume change of 2%, after Mn (20% Mn) doping, resulted in the shortening of lead halide (Pb–Br/Cl) bond lengths and similar feature was also noted in chloride analog (Supplementary Table 5, 6).…”

“…Two types of Cs sites are present: the Cs(1) site form an alternating octahedra with PbX 6 , whereas the Cs(2) trigonal prisms share one triangular face to form infinite [CsPbX 6 ] n 3 – chains along the [001] direction 24 . The synthesized samples were highly crystalline matching with the rhombohedral Cs 4 PbX 6 phase (X = Br, Br/Cl, and Cl; space group: R c ) as presented in Fig.…”

Crystal Growth and Structure of the New Ferrimagnetic Oxyphosphate PbFe3O(PO4)3

“…[30] One advantage of combining high-temperature solution growth with a directional solidification method such as vertical Bridgman's is the separation of bulk portions grown successively, which adopt a different phase content and associated microstructure at each equilibrium phase relationship change. The powder phase was prepared by coprecipitation from Pb(NO 3 ) 2 , Fe(NO 3 ) 3 ·9H 2 O and (NH 4 ) 2 HPO 4 (1:3:3), first dissolved separately in a minimum volume of distilled water, then mixed, dried at 100°C and thermally treated at 200 and 400°C to remove ammoniac, residual water and nitrate groups.…”