氮化镁的制备及发光性能研究

In this study, a series of novel red emission phosphors Mg3-xN2:xEu2+ (0 ≤ x ≤ 0.08) have been successfully synthesized by solid-state reactions in a low temperature. The excitation spectra of Mg3N2:Eu2+ phosphors show a strong excitation ranging from 250 nm to 450 nm, with dominated excitation peak around 428 nm. Under 428 nm excitation, the phosphors exhibit a broadband red emission peaking at about 612 nm with a tail on the long wavelength side. According to experimental observation data, we propose an underlying mechanism of thermal quenching and elucidate the large thermal quenching of Mg3N2:Eu2+ by the configurational coordinate diagram. The current results indicate that Mg3N2:Eu2+ could be conducive to the development of WLEDs.