Crystal phase control of luminescing NaGdF4:Eu3+ nanocrystals

被引：161

作者：

Ptacek, Pavel ^{[1
]}

Schaefer, Helmut ^{[1
]}

Koempe, Karsten ^{[1
]}

Haase, Markus ^{[1
]}

机构：

[1] Univ Osnabruck, Inst Chem, D-49076 Osnabruck, Germany

来源：

ADVANCED FUNCTIONAL MATERIALS | 2007年 / 17卷 / 18期

关键词：

D O I：

10.1002/adfm.200600974

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

NaGdF4:Eu3+, NaEuF4, and NaGdF4 nanocrystals were synthesized in the high-boiling coordinating solvent N-(2-hydroxyethyl)-ethylenediamine (HEEDA). Phase pure nanomaterials, crystallizing either in the cubic a-phase or the hexagonal P-phase, were obtained by adjusting one reaction parameter only, i.e., the molar ratio between metal and fluoride ions in the synthesis. The hexagonal P-phase is formed, if this molar ratio is close to stoichiometric, whereas the cubic a-phase is obtained in the presence of excess metal ions. The optical properties of the Eu3+ doped samples are different for the two crystal phases. The results indicate an increased number of oxygen impurities close to Eu3+ ions, if excess metal ions are used in the synthesis.

引用

页码：3843 / 3848

页数：6

共 29 条

[1] Visible light emission upon near-infrared excitation in a transparent solution of nanocrystalline β-NaGdF4:Yb3+, Er3+ [J].

Aebischer, A ;

Heer, S ;

Biner, D ;

Krämer, K ;

Haase, M ;

Güdel, HU .

CHEMICAL PHYSICS LETTERS, 2005, 407 (1-3) :124-128

[2] Spectral properties of Eu3+ doped NaGdF4 nanocrystals [J].

Bednarkiewicz, A ;

Mech, A ;

Karbowiak, M ;

Strek, W .

JOURNAL OF LUMINESCENCE, 2005, 114 (3-4) :247-254

[3]

Blasse G., 1994, LUMINESCENT MAT, DOI [10.1007/978-3-642-79017-1_1, DOI 10.1007/978-3-642-79017-1_1]

[4] CRYSTAL STRUCTURE OF HEXAGONAL SODIUM NEODYMIUM FLUORIDE AND RELATED COMPOUNDS [J].

BURNS, JH .

INORGANIC CHEMISTRY, 1965, 4 (06) :881-&

[5] INVESTIGATION OF CHARGE-TRANSFER O2--]LN3+ AND F--]LN3+ IN LAF3(LN3+, O2-) AND YF3(LN3+, O2-) SYSTEMS [J].

GERARD, I ;

KRUPA, JC ;

SIMONI, E ;

MARTIN, P .

JOURNAL OF ALLOYS AND COMPOUNDS, 1994, 207 :120-127

[6] Highly efficient multicolour upconversion emission in transparent colloids of lanthanide-doped NaYF4 nanocrystals [J].

Heer, S ;

Kömpe, K ;

Güdel, HU ;

Haase, M .

ADVANCED MATERIALS, 2004, 16 (23-24) :2102-+

[7] NATURE OF THE CHARGE-TRANSFER STATES OF THE TRIGONAL AND TETRAGONAL EU3+ CENTERS IN CDF2 CRYSTALS [J].

HOMMEL, D ;

LANGER, JM .

JOURNAL OF LUMINESCENCE, 1979, 18-9 (JAN) :281-284

[8] *ANOMALE MISCHKRISTALLE ZWISCHEN BETA-NAYF4 UND YF3 [J].

HUND, F .

ZEITSCHRIFT FUR ANORGANISCHE CHEMIE, 1950, 263 (1-3) :102-111

[9] Comparison of different NaGdF4:Eu3+ synthesis routes and their influence on its structural and luminescent properties [J].

Karbowiak, M ;

Mech, A ;

Bednarkiewicz, A ;

Strek, W ;

Kepinski, L .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2005, 66 (06) :1008-1019

[10] Hexagonal sodium yttrium fluoride based green and blue emitting upconversion phosphors [J].

Krämer, KW ;

Biner, D ;

Frei, G ;

Güdel, HU ;

Hehlen, MP ;

Lüthi, SR .

CHEMISTRY OF MATERIALS, 2004, 16 (07) :1244-1251

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