Improved Photoluminescence Properties of Bi3+, Mn4+-Codoped Orthorhombic LaGaO3 Perovskite Phosphor

Thanks to the unique sharp red emission spectra and broadband excitation, Mn4+ ions activated oxide host matrixes exhibit fascinating potential application in white light-emitting diodes (wLEDs). In this work, Mn4+ activated LaGaO3 with a perovskite structure were successfully synthesized via a solid state reaction, which exhibits a near infrared (NIR) emission with high brightness, locating around 710 nm. Moreover, the introduction of the transition metal Bi3+ ions contributes to a remarkable improved luminescence output of Mn4+ ions with enhanced internal quantum efficiency performance.