Excitation and photoluminescence spectra of solid solutions based on lanthanum indate LaInO3 of a perovskite structure doped with Nd3+ and Cr3+ ions

Using a solid-phase method, single-phase solid solutions of La 1– x Nd x InO 3 ( x = 0.007, 0.02, 0.05), LaIn0.99Cr0.01O3, and La 0.95 Nd 0.05 In 0.995 Cr 0.005 O 3 have been obtained and their excitation and photoluminescence (PL) spectra have been studied at room temperature. It is found that the intensity of excitation and PL bands for La 1– x Nd x InO 3 solid solutions depends on the degree of the substitution of La 3+ ions by Nd 3+ ions. A solid solution with 0.02 < x < 0.05 possesses the largest intensity of the PL bands in IR wavelength range of 850–950, 1040–1100, and 1350–1370 nm. It is found that replacing 0.5% of In 3+ ions in a solid solution of La 0.95 Nd 0.05 InO 3 by Cr 3+ ions leads to a substantial increase in the intensity of all the PL bands by exciting with light of the wavelength of λ exc = 490 nm and a decrease in the intensity of all the PL bands by an excitation with light of the wavelengths of λ exc = 358, 532, and 585 nm.