Photoluminescence properties of ZnS/CdS/ZnS quantum dot-quantum wells doped with Ag+ ions

被引：3

作者：

Qu, Hua ^{[1
,2
]}

Cao, Lixin ^{[1
]}

Liu, Wei ^{[1
]}

Su, Ge ^{[1
]}

Dong, Bohua ^{[1
]}

Zhai, Hui ^{[1
]}

机构：

[1] Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China

[2] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China

来源：

JOURNAL OF NANOPARTICLE RESEARCH | 2011年 / 13卷 / 10期

基金：

美国国家科学基金会;

关键词：

Quantum dot-quantum wells; ZnS/CdS/ZnS; Ag+ dopants; Luminescence; NANOCRYSTALLINE ZNSMN2+; CADMIUM-SULFIDE; CDS/HGS/CDS; HETERONANOSTRUCTURES; ENHANCEMENT; EFFICIENCY;

D O I：

10.1007/s11051-011-0498-5

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Enhanced photoluminescence and postirradiation luminescence is reported from Ag+-doping ZnS/CdS/ZnS quantum dot-quantum wells (QDQWs) prepared via a reverse micelle process. Controlling the final mole ratio of water-to-surfactant in H2O/Heptane system, the size of a QDQW was estimated to be similar to 6 nm. Compared to undoped QDQWs, the doped QDQWs exhibited a much stronger orange emission, with a peak blue shift from 615 to 590 nm; the quantum yield was increased from 2.63 to 9.31%, and the remaining luminescence intensity after 2 h ultraviolet irradiation was increased from 71.2 to 94.7%. This improved quantum yield and postirradiation luminescence intensity for doped QDQWs was ascribed to the introduction of Ag+ ions to CdS wells.

引用

页码：5157 / 5161

页数：5

共 15 条

[1] Luminescence quantum efficiency of nanocrystalline ZnS:Mn2+.: 1.: Surface passivation and Mn2+ concentration [J].

Bol, AA ;

Meijerink, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (42) :10197-10202

[2] Luminescence quantum efficiency of nanocrystalline ZnS:Mn2+.: 2.: Enhancement by UV irradiation [J].

Bol, AA ;

Meijerink, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (42) :10203-10209

[3] Theory for quantum-dot quantum wells: Pair correlation and internal quantum confinement in nanoheterostructures [J].

Bryant, GW .

PHYSICAL REVIEW B, 1995, 52 (24) :16997-17000

[4] Effect of layer thickness on the luminescence properties of ZnS/CdS/ZnS quantum dot quantum well [J].

Cao, LX ;

Huang, SH ;

Lü, SZ ;

Lin, JL .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2005, 284 (02) :516-520

[5] Luminescence enhancement of core-shell ZnS:Mn/ZnS nanoparticles [J].

Cao, LX ;

Zhang, JH ;

Ren, SL ;

Huang, SH .

APPLIED PHYSICS LETTERS, 2002, 80 (23) :4300-4302

[6] A QUANTUM-DOT QUANTUM-WELL - CDS/HGS/CDS [J].

EYCHMULLER, A ;

MEWS, A ;

WELLER, H .

CHEMICAL PHYSICS LETTERS, 1993, 208 (1-2) :59-62

[7] PHOTO-DEGRADATION AND FLUORESCENCE OF COLLOIDAL-CADMIUM SULFIDE IN AQUEOUS-SOLUTION [J].

HENGLEIN, A .

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1982, 86 (04) :301-305

[8] Formation of quantum-dot quantum-well heteronanostructures with large lattice mismatch: ZnS/CdS/ZnS [J].

Little, RB ;

El-Sayed, MA ;

Bryant, GW ;

Burke, S .

JOURNAL OF CHEMICAL PHYSICS, 2001, 114 (04) :1813-1822

[9] Charge separation effects on the rate of nonradiative relaxation processes in quantum dots quantum well heteronanostructures [J].

Little, RB ;

Burda, C ;

Link, S ;

Logunov, S ;

El-Sayed, MA .

JOURNAL OF PHYSICAL CHEMISTRY A, 1998, 102 (33) :6581-6584

[10] PREPARATION, CHARACTERIZATION, AND PHOTOPHYSICS OF THE QUANTUM-DOT QUANTUM-WELL SYSTEM CDS/HGS/CDS [J].

MEWS, A ;

EYCHMULLER, A ;

GIERSIG, M ;

SCHOOSS, D ;

WELLER, H .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (03) :934-941

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