Combustion synthesis of SrIn2O4:Eu3+ red-emitting phosphor for white light-emitting diodes

Abstract

The SrIn2O4:Eu3+ phosphor was synthesized by combustion with ignition temperature of 470 °C. The X-ray diffraction pattern shows that pure SrIn2O4:Eu3+ phosphor was obtained and an efficient red emission under near-ultraviolet (UV) excitation was observed. The emission spectrum shows the most intense peak is located at 613 nm, which corresponds to the 5D0→7F2 transition of Eu3+. The phosphor has two main excitation peaks located at 397 nm and 469 nm, which match the emission of UV and blue LED respectively. The obtained phosphor consists of many crystalline granules, which are tiny enough so that they need not to be crushed before application. The SrIn2O4:Eu3+ is a potential red-emitting phosphor for white light-emitting diodes.