Discovery of New Solid Solution Phosphors via Cation Substitution-Dependent Phase Transition in M3(PO4)2:Eu2+ (M = Ca/Sr/Ba) Quasi-Binary Sets
Discovery of New Solid Solution Phosphors via Cation Substitution-Dependent Phase Transition in M3(PO4)2:Eu2+ (M = Ca/Sr/Ba) Quasi-Binary Sets
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DOI：
10.1021/jp509743r
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发表时间：
2015-01-29
影响因子：
3.7
通讯作者：
Liu, Yangai
中科院分区：
文献类型：
--
作者：
Ji, Haipeng;Huang, Zhaohui;Liu, Yangai
采用阳离子取代相关的相变作为发现新的固溶体荧光体和有效调节M-3（PO 4）（2）：Eu 2+（M = Ca/Sr/Ba）准二元系中Eu 2+发光性质的策略。报道了几种新的荧光粉，包括绿白色的SrCa_2（PO_4）（2）：Eu ~（2+）、黄色的SrCa_2（PO_4）（2）：Eu ~（2+）和青色的Ba_2 Ca（PO_4）（2）：Eu ~（2+），并讨论了它们的发射光谱向相变点的剧烈红移。在三种M-3（PO 4）（2）：Eu ~（2+）连接体中，发光随结构的变化表现出不同的行为。Sr-3（PO 4）（2）和Ba-3（PO 4）（2）形成连续的等结构固溶体组，其中Eu 2+表现出类似的对称窄带蓝光发射，中心位于416 nm，而Sr 2+取代Ca 2+引起成分相关的相变，峰值发射红移到527 nm，接近相变点。在Ca 3-xBax（PO（4））2：Eu 2+组中，进一步验证了相变边界之间磷光体晶体化学设计的有效性。这种阳离子取代策略可以帮助开发基于相变具有可控调谐的光学性质的新磷光体。
The cation substitution-dependent phase transition was used as a strategy to discover new solid solution phosphors and to efficiently tune the luminescence property of divalent europium (Eu2+) in the M-3(PO4)(2):Eu2+ (M = Ca/Sr/Ba) quasi-binary sets. Several new phosphors including the greenish-white SrCa2(PO4)(2):Eu2+, the yellow Sr2Ca(PO4)(2):Eu2+, and the cyan Ba2Ca(PO4)(2):Eu2+ were reported, and the drastic red shift of the emission toward the phase transition point was discussed. Different behavior of luminescence evolution in response to structural variation was verified among the three M-3(PO4)(2):Eu2+ joins. Sr-3(PO4)(2) and Ba-3(PO4)(2) form a continuous isostructural solid solution set in which Eu2+ exhibits a similar symmetric narrow-band blue emission centered at 416 nm, whereas Sr2+ substituting Ca2+ in Ca-3(PO4)(2) induces a composition-dependent phase transition and the peaking emission gets red shifted to 527 nm approaching the phase transition point. In the Ca3-xBax(PO(4))2:Eu2+ set, the validity of crystallochemical design of phosphor between the phase transition boundary was further verified. This cation substitution strategy may assist in developing new phosphors with controllably tuned optical properties based on the phase transition.