Luminescence properties of Sm3+ doped LaP3O9 phosphors

La1-xP3O9:xSm phosphor was synthesized by co-precipitation method. The XRD results revealed the phosphor's orthorhombic structure where the La3+ ion is present at the bisdisphenoid dodecahedron position but is completely replaced by Sm3+ ions in the host matrix after Sm3+ doping. The FT-IR spectroscopy results show sharp bands in the 400-1400 cm(-1) region due to different bonding vibrations in the phosphate groups. Optical transitions and band gaps were estimated for La0.97P3O9:0.03Sm phosphor by using diffuse reflectance spectroscopy. PL excitation and emission spectral studies revealed that La0.97P3O9 phosphor with 0.03 mol of Sm3+ is the optimum composition for reddish-orange emission with relatively better color purity percentage and promising potential application for reddish-orange visible photonic devices.

Automated summary

La1-xP3O9:xSm phosphor was synthesized through co-precipitation method, with XRD results showing complete replacement of La3+ ions by Sm3+ ions after doping. FT-IR and XRD results revealed the structural and chemical composition of the phosphor, while diffuse reflectance spectroscopy and PL spectral studies revealed its optical properties and emission characteristics.