Mn^(4+)激活荧光粉可用锰源与制备方法

Available Manganese-containing Chemicals and Synthesis Methods for Mn^(4+)-activated Phosphors

Mn^(4+)激活荧光粉可在蓝光激发下发射波长可调的红光,是当前白光发光二极管用荧光粉的研究热点之一。在制备Mn^(4+)激活红光荧光粉时,有多种锰源可供选择,如K_(2)MnF_(6)、KMnO_(4)、Mn(HPO_(4))_(2)、MnCO_(3)、MnO_(2)、MnO、Mn(NO_(3))_(2)、Mn(CH_(3)COO)_(2)等。本文综述了文献中在制备Mn^(4+)激活氟化物、氟氧化物和氧化物基质红光荧光粉时采用的锰源,列举了相应的制备方法,并总结了采取不同锰源和制备方法对所合成荧光粉的荧光性质(如量子效率)等方面的影响。最后就如何控制Mn^(4+)激活荧光粉中锰离子价态等进行了展望。

The Mn^(4+) activated phosphors can emit wavelength-tunable red luminescence under blue light excitation,which is one of the hotspots in the field of red phosphor for white light-emitting diodes.There are several manganese-containing chemicals that were used as manganese source,including K_(2)MnF_(6),KMnO_(4),Mn(HPO_(4))_(2),MnCO_(3),MnO_(2),MnO,Mn(NO_(3))_(2),and Mn(CH_(3)COO)_(2).This mini-review summarized the types of these chemicals that have been chosen in literatures as the manganese source for the synthesis of Mn^(4+)-doped fluoride,oxyfluoride,and oxide phosphors via different synthesis methods.The influences of choosing different manganese sources and synthesis methods on the photoluminescence properties(for example,the quantum efficiency)of the as-prepared phosphors were summarized.Finally,the methods for controlling the valence state of manganese ions in the as-synthesized phosphors were prospected.