Energy transfer and luminescent properties of Li2SnO3:Mn4+ phosphors

Abstract

Li2SnO3:Mn4+ red phosphors were prepared using a high-temperature solid-phase method. The samples were characterized and analyzed by X-ray diffractometry, scanning electron microscopy, and fluorescence spectrometry, and the photoluminescence properties of the Mn4+-doped Li2SnO3 matrix were explored. The results show that the doping of Mn4+ did not change the crystal structure of the Li2SnO3 matrix but successfully substituted some Sn4+ sites into the substrate structure. The purity of the prepared samples was high, the distribution of the elements was uniform, and the particle size was at the micron level. Under ultraviolet light excitation of 330 nm, the highest emission peak of the Li2SnO3:Mn4+ phosphor was located at 658 nm in the red-light region, and the highest emission intensity was achieved when the Mn4+ dosage was 0.7%. The testing results of the light-emitting diode (LED) device that was packaged using Li2SnO3:Mn4+ phosphors as raw material showed that the Li2SnO3:Mn4+ phosphor was a suitable source of light for plant growth and can also be used to supplement the red-light component that white-light LEDs need.