Sol-gel-derived BPO4/Ba2+ as a new efficient and environmentally-friendly bluish-white luminescent material

被引：84

作者：

Lin, CK

Luo, Y

You, H

Quan, Z

Zhang, J

Fang, J

Lin, J ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Rare Earth Chem & Phys, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

[3] Univ New Orleans, Dept Chem, New Orleans, LA 70148 USA

[4] Univ New Orleans, Adv Mat Res Inst, New Orleans, LA 70148 USA

来源：

CHEMISTRY OF MATERIALS | 2006年 / 18卷 / 02期

关键词：

D O I：

10.1021/cm052109h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, BPO4 and Ba2+-doped BPO4 powder samples were prepared by the sol-gel process using glycerol and poly(ethylene glycol) as additives. The structure and optical properties of the resulting samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FESEM), diffuse reflection spectra, photoluminescence (PL) excitation and emission spectra, quantum yield, kinetic decay, and electron paramagnetic resonance (EPR), respectively. It was found that the undoped BPO4 showed a weak purple blue emission (409 nm, lifetime 6.4 ns) due to the carbon impurities involved in the host lattice. Doping Ba2+ into BPO4 resulted in oxygen-related defects as additional emission centers which enhanced the emission intensity greatly (> 10x) and shifted the emission to a longer-wavelength region (lambda(max) = 434 nm; chromaticity coordinates: x = 0.174, y = 0. 187) with a bluish-white color. The highest emission intensity was obtained ;when doping 6 mol % Ba2+ in BPO4, which has a quantum yield as high as 31%. The luminescent mechanisms of BPO4 and Ba2+-doped BPO4 were discussed in detail according to the existing models for silica-based materials.

引用

页码：458 / 464

页数：7

共 37 条

[1] Strong anisotropic thermal expansion in cristobalite-type BPO4 [J].

Achary, SN ;

Tyagi, AK .

JOURNAL OF SOLID STATE CHEMISTRY, 2004, 177 (11) :3918-3926

[2] The isotopic effect and spectroscopic studies of boron orthophosphate (BPO4) [J].

Adamczyk, A ;

Handke, M .

JOURNAL OF MOLECULAR STRUCTURE, 2000, 555 :159-164

[3] Tunable photoluminescence from a material made by the interaction between (3-aminopropyl)triethoxysilane and organic acids [J].

Bekiari, V ;

Lianos, P .

CHEMISTRY OF MATERIALS, 1998, 10 (12) :3777-+

[4]

Blasse G., 1994, LUMINESCENT MAT

[5] Photoluminescence from sol-gel organic/inorganic hybrid gels obtained through carboxylic acid solvolysis [J].

Brankova, T ;

Bekiari, V ;

Lianos, P .

CHEMISTRY OF MATERIALS, 2003, 15 (09) :1855-1859

[6] Sol-gel derived urea cross-linked organically modified silicates.: 2.: Blue-light emission [J].

Carlos, LD ;

Bermudez, VD ;

Ferreira, RAS ;

Marques, L ;

Assunçao, M .

CHEMISTRY OF MATERIALS, 1999, 11 (03) :581-588

[7] White-light emission of amine-functionalized organic/inorganic hybrids:: Emitting centers and recombination mechanisms [J].

Carlos, LD ;

Ferreira, RAS ;

Pereira, RN ;

Assunçao, M ;

Bermudez, VD .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (39) :14924-14932

[8]

CARLOS LD, 2003, HDB ORGANIC INORGANI, V1, P353

[9]

CHAU CN, 1992, Patent No. 5082640

[10] Blue emitting hybrid organic-inorganic materials [J].

Cordoncillo, E ;

Guaita, FJ ;

Escribano, P ;

Philippe, C ;

Viana, B ;

Sanchez, C .

OPTICAL MATERIALS, 2001, 18 (03) :309-320

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