Mn-Mg共掺杂AlON荧光粉制备及荧光性质

采用固相反应法成功合成了一系列Mn-Mg共掺的Al₂₃O₂₇N₅荧光粉。结果显示煅烧条件和Mn的掺杂浓度对Mn-Mg共掺的AlON荧光粉的制备和发光性质都有重要影响。获得纯相AlON的温度从未掺杂的1 900 ℃下降到10% Mn和10% Mg(摩尔分数)共掺杂的1 800 ℃。晶格参数随着Mn掺杂浓度升高而增加,说明Mn进入了AlON晶格中。未掺杂和Mg单掺以及10% Mn和10% Mg共掺杂样品的发射光谱都含有一个350～600 nm之间的宽带发射。绿光发射归属于Mn的3d电子之间的传输。蓝光发射可能与杂质或Al空位相关。

Synthesis and Photoluminescence of Mn-Mg Co-doped AlON Phosphors

A set of spinel-type Al₂₃O₂₇N₅ phosphors co-doped with Mn-Mg were successfully synthesized by solid-state reaction. The results clearly show that the calcination conditions and doping concentration influence the preparation and photoluminescence properties of Mn-doped AlON phosphors. The temperature for obtaining undoped pure phase Al₂₃O₂₇N₅ sample is 1 900 ℃ for, while is 1 800 ℃ for 10% Mn and 10% Mg(mole fraction) co-doped samples. The lattice parameter increases with Mn concentration, which suggesting Mn²⁺ ion doped into AlON crystal lattice. The PL spectra reveal that there exist a broad-band emission from 350 to 600 nm for undoped and all of doped samples. The broad band green emission is observed in 10% Mn and 10%Mg(mole fraction) co-doped sample. The green emission is attributed to the transition of 3d electrons of Mn²⁺ ion and the blue emission might be related to impurities or Al vacancy.