Improved Photoluminescence Properties of Bi 3+ , Mn 4+ -Codoped Orthorhombic LaGaO 3 Perovskite Phosphor

Thanks to the unique sharp red emission spectra and broadband excitation, Mn 4+ ions activated oxide host matrixes exhibit fascinating potential application in white light-emitting diodes (wLEDs). In this work, Mn 4+ activated LaGaO 3 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 Bi 3+ ions contributes to a remarkable improved luminescence output of Mn 4+ ions with enhanced internal quantum efficiency performance.