Spectroscopic analysis of Nd3+doped Ba3Bi(PO4)3 phosphor for near-infrared laser application

Near infrared (NIR) emission plays a crucial role in various applications, driving ongoing research to identify new hosts capable of NIR emission. This article explores NIR emission in the Ba3Bi(PO4)3 host. X-ray diffraction (XRD) patterns confirm that the Ba3Bi(PO4)3 belongs to Eulytite family (I43d). Electron micrographs revealed the development of heterogeneous microstructures with noticeable agglomeration. Nd3+ was used as an activator to achieve NIR emission. In the emission spectra characteristic lines were observed. Among them the one at 1062 nm (Nd3+: 4F3/2 -> 4I11/2) is the most intense. Results on the effect of increasing activator concentration on luminescence intensity are also presented. The highest intensity is observed for the composition Ba3Bi0.095Nd0.05(PO4)3. A decrease in intensity beyond 5.0 mol% is attributed to concentration quenching. Based on these findings, the critical distance, Rc was evaluated as 22.29 & Aring;. These results indicate that the optimized Nd3+doped Ba3Bi(PO4)3 phosphor has potential as NIR-emitting materials for laser applications and infrared bioimaging.