The role of type II FB (I):Tl+ defect in laser light generation and color image formation at the low coordination surface sites of AgBr: ab initio calculations

Investigations of the Defect Structures and EPR Parameters for the Tetragonal and Cubic Ni²⁺ Centers in AgX (X=Cl, Br)

“…For a 3d 8 ion under octahedral (O h ) crystal-fields, 3 A 2 (F) orbital singlet is the ground state. When the ligand octahedron is distorted along C 4 axis, 3 A 2 (F) would split into one singlet and one doublet in the absence of external magnetic field due to the combination of tetragonal distortion and the spin-orbit coupling interactions. The above separation can be described by zero-field splitting D…”

“…AgX (X=Cl and Br) doped with transition-metal impurities have been extensively studied due to their unique laser, color image formation, electrochemical and optoelectronic properties and applications in sensors [1][2][3][4][5][6]. Particularly, studies on ionic conductivity arising from silver vacancies were also carried out for AgX crystals with transition-metal (e.g., Ni 2+ , Co 2+ , V 2+ ) dopants [7][8][9][10].…”

Theoretical studies of the local structures and the spin Hamiltonian parameters of the tetragonal Ru3+ centers in AgCl and AgBr

“…In addition, these materials doped with transition-metal impurities can exhibit unique laser light generation and color image formation as well as low-temperature radiative recombination [5][6][7]. Particularly, ionic conductivity studies due to the silver vacancies were also carried out for AgX crystals with transition-metal ions dopants (e.g., Co 2+ , V 2+ , Ni 2+ ) [8].…”