Crystallographic and luminescence studies of Gd2Si2O7: Er3+nanomaterials for NUV energized lighting applications

Gd2-xSi2O7:xEr3+ (x = 1-6 mol%) green light-emitting nanomaterials were prepared via Solution-combustion (SC) synthetic route. Structural and spectrophotometric analysis were executed to recognize the phase identi-fication and luminescence characteristics of the designated nanophosphors, respectively. The obtained crystal-lographic parameters clearly indicated that the synthesized nanomaterials are structured into the triclinic phase with P-1 space group. The enlarged view of concentration dependent XRD patterns of Gd2Si2O7:Er3+ samples specifies that as the Er3+ ion concentration increases, the diffraction peaks show a regular shift towards higher value of 2 theta. The average particle size lies in range of several nanometres which distinctively rationalizes the requirements of these samples in lighting applications. Under NUV excitation at 389 nm, Gd2Si2O7:Er3+ samples exhibit cool green light emission corresponding to 4S3/2 -> 4I15/2 (553 nm) electronic transitions of dopant ion. The dipolar-dipolar interaction is plausible for the energy transference amongst the dopants in Gd2Si2O7:Er3+ materials. The triple-exponential fitting behavior explains the possibility of occurrence of three different cationic sites for the Er3+ ions in the host matrix.