Department of Printed Electronics, World Class University Program, Sunchon National University , Sunchon, Chonnam 540-742, Korea.
ACS Comb Sci. 2012 Oct 8;14(10):537-44. doi: 10.1021/co300057e. Epub 2012 Sep 4.
A double-ternary combinatorial chemistry (combi-chem) library was visualized in terms of structure, PL intensity, and color chromaticity for a nitride phosphor system, ARSi4N7:Eu(2+) (A = Sr, Ca, Ba; R = Y, La, Lu), so as to obtain a quantitative structure and property relationship (QSPR) in a systematic manner. Most of the samples constituting the double-ternary combi-chem library turned out to have ARSi4N7 structures with a P63mc space group. However, several phases such as Ca2Si5N8 with a Cc space group, LaSi3N5 with a P212121 space group, R6Si11N20O with a P31c space group, etc., coexisted. Aside from the green luminescence from the well-known SrYSi4N7:Eu(2+) and BaYSi4N7:Eu(2+) phosphors, their solid solutions (Sr,Ba)Si4N7:Eu(2+) proved to possess better PL properties. In addition, novel phosphors with an acceptable green PL intensity and color chromaticity were discovered in the ALuSi4N7:Eu(2+) side of the double-ternary combi-chem library. The Ca-rich side did not constitute a single-phase ARSi4N7 structure with a P63mc space group, and therefore the red emission in the Ca-rich side proved to originate from well-known Ca2Si5N8:Eu(2+) phosphors, which resided in the sample as a minor phase.
采用双三元组合化学（组合化学）库的方法，可视化氮化物荧光粉体系 ARSi4N7：Eu(2+)（A = Sr、Ca、Ba；R = Y、La、Lu）的结构、光致发光（PL）强度和颜色色度，以便系统地获得定量结构与性质关系（QSPR）。组成双三元组合化学库的大多数样品都具有 ARSi4N7 结构和 P63mc 空间群。然而，一些相如 Cc 空间群的 Ca2Si5N8、P212121 空间群的 LaSi3N5、P31c 空间群的 R6Si11N20O 等也共存。除了著名的 SrYSi4N7：Eu(2+)和 BaYSi4N7：Eu(2+)荧光粉的绿色发光之外，它们的固溶体（Sr，Ba）Si4N7：Eu(2+)表现出更好的 PL 性质。此外，在双三元组合化学库的 ALuSi4N7：Eu(2+)侧发现了具有可接受的绿色 PL 强度和颜色色度的新型荧光粉。富 Ca 侧未构成具有 P63mc 空间群的单相 ARSi4N7 结构，因此富 Ca 侧的红色发射源于著名的 Ca2Si5N8：Eu(2+)荧光粉，它作为次要相存在于样品中。
