Figures S1, S2 and S3; Tables S1 and S2

Luminescence decay curves of Sr2Al2GeO7:x%Pr3+ (x = 0.1, 0.5, 1, 3, 5, 10, 20, 30) samples monitoring emissions at 491 and 1070 nm; Luminescence decay curves of Pr3+ activator at 970, 990, 1000, 1010, 1030 and 1070 nm for the Sr2Al2GeO7:1%Pr3+ sample; Fitting functions, R-squared (R^2), fitting parameters, and the calculated decay time of decay curve of Pr3+ at 970, 990, 1000, 1010, 1030 and 1070 nm for the Sr2Al2GeO7:1%Pr3+ sample; Measured internal quantum efficiency (IQE), absorbance (Abs), and external quantum efficiency (EQE) of the Sr2Al2GeO7:x%Pr3+ (x = 0.5, 1, 3) representative samples