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题名: K8Nb7P7O39: a new type of complicated incommensurately modulated structure and photoluminescence properties of Eu3+-doped solid solutions
作者: Zhao, Dan1, 2;  Cui, Jun-Yan1;  Han, Hong-Xian1;  Li, Can1
刊名: JOURNAL OF MATERIALS CHEMISTRY C
发表日期: 2016
DOI: 10.1039/c6tc03022j
卷: 4, 期:48, 页:11436-11448
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Materials Science, Multidisciplinary ;  Physics, Applied
研究领域[WOS]: Materials Science ;  Physics
英文摘要: A new type of potassium niobium phosphate, K8Nb7P7O39, has been prepared and its structure has been determined by single crystal X-ray diffraction analysis. The results show that it crystallizes in a novel (3 + 1)-dimensional incommensurately modulated structure with a triclinic superspace group P (1) over bar(alpha beta gamma)O and modulation vector q = -0.35281a* + 0.17630b* + 0.25807c*. The structure of K8Nb7P7O39 contains [K-3.66](infinity) N, [K-4.34](infinity) N and [Nb7P7O39](infinity) N layers alternately stacked along the c-axis. In this structure, seven not fully occupied K atoms (six of them come from the [K-3.66](infinity) N layer and the remaining one comes from the [K-4.34]infinity N layer) are thought to be the dominant factors in driving the structural modulation. The strong occupational modulation in combination with positional modulation of these seven K atoms can be described by crenel-type modulation functions. Furthermore, elemental composition, UV-Vis absorption spectrum, SEM morphology and photoluminescence properties induced by Eu3+-doping have been studied for K8Nb7P7O39. The excitation spectrum covers a wide range from 362 to 465 nm and it matches well with the emission of near-UV InGaN-based LED chips and bluish-green LED chips, indicating that K8Nb7P7O39: Eu3+ has potential as a red-emitting phosphor for LED applications.
关键词[WOS]: HIGH-TEMPERATURE SUPERCONDUCTOR ;  BOND-VALENCE PARAMETERS ;  CRYSTAL-STRUCTURE ;  LUMINESCENCE PROPERTIES ;  OPTICAL-PROPERTIES ;  ENERGY-TRANSFER ;  PHASE-TRANSITIONS ;  BAND-STRUCTURE ;  PHOSPHORS ;  DIFFRACTION
语种: 英语
WOS记录号: WOS:000390787600010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/151840
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Henan Polytech Univ, Coll Chem & Chem Engn, Jiaozuo 454000, Henan, Peoples R China

Recommended Citation:
Zhao, Dan,Cui, Jun-Yan,Han, Hong-Xian,et al. K8Nb7P7O39: a new type of complicated incommensurately modulated structure and photoluminescence properties of Eu3+-doped solid solutions[J]. JOURNAL OF MATERIALS CHEMISTRY C,2016,4(48):11436-11448.
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