Highly emissive colloidal CdSe/CdS heterostructures of mixed dimensionality

被引：542

作者：

Talapin, DV

Koeppe, R

Götzinger, S

Kornowski, A

Lupton, JM

Rogach, AL

Benson, O

Feldmann, J

Weller, H

机构：

[1] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany

[2] Univ Munich, Dept Phys, Photon & Optoelect Grp, D-80799 Munich, Germany

[3] Univ Munich, CeNS, D-80799 Munich, Germany

[4] Humboldt Univ, Inst Phys, D-10117 Berlin, Germany

来源：

NANO LETTERS | 2003年 / 3卷 / 12期

关键词：

D O I：

10.1021/nl034815s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate that efficient shape control may be achieved in the shell of colloidally grown semiconductor nanocrystals (independent of the core), allowing the combination of a 0-D spherical CdSe core with a 1-D rodlike CdS shell. Besides exhibiting linearly polarized emission with a room-temperature quantum efficiency above 70%, these mixed-dimensionality colloidal heterostructures display large, length-dependent Stokes shifts as well as giant extinction coefficients approaching 10(7) cm(-1) M-1.

引用

收藏

页码：1677 / 1681

页数：5

相关论文

共 30 条

[1] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[2] Semiconductor nanocrystals as fluorescent biological labels [J].

Bruchez, M ;

Moronne, M ;

Gin, P ;

Weiss, S ;

Alivisatos, AP .

SCIENCE, 1998, 281 (5385) :2013-2016

[3] Electroluminescence from single monolayers of nanocrystals in molecular organic devices [J].

Coe, S ;

Woo, WK ;

Bawendi, M ;

Bulovic, V .

NATURE, 2002, 420 (6917) :800-803

[4] (CdSe)ZnS core-shell quantum dots: Synthesis and characterization of a size series of highly luminescent nanocrystallites [J].

Dabbousi, BO ;

RodriguezViejo, J ;

Mikulec, FV ;

Heine, JR ;

Mattoussi, H ;

Ober, R ;

Jensen, KF ;

Bawendi, MG .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (46) :9463-9475

[5] BAND-EDGE ABSORPTION AND LUMINESCENCE OF NONSPHERICAL NANOMETER-SIZE CRYSTALS [J].

EFROS, AL ;

RODINA, AV .

PHYSICAL REVIEW B, 1993, 47 (15) :10005-10007

[6] LUMINESCENCE POLARIZATION OF CDSE MICROCRYSTALS [J].

EFROS, AL .

PHYSICAL REVIEW B, 1992, 46 (12) :7448-7458

[7] Photoluminescence spectroscopy of single CdSe nanocrystallite quantum dots [J].

Empedocles, SA ;

Norris, DJ ;

Bawendi, MG .

PHYSICAL REVIEW LETTERS, 1996, 77 (18) :3873-3876

[8] Linearly polarized emission from colloidal semiconductor quantum rods [J].

Hu, JT ;

Li, LS ;

Yang, WD ;

Manna, L ;

Wang, LW ;

Alivisatos, AP .

SCIENCE, 2001, 292 (5524) :2060-2063

[9] Controlled synthesis of multi-armed CdS nanorod architectures using monosurfactant system [J].

Jun, YW ;

Lee, SM ;

Kang, NJ ;

Cheon, J .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (21) :5150-5151

[10] Epitaxial growth and photochemical annealing of graded CdS/ZnS shells on colloidal CdSe nanorods [J].

Manna, L ;

Scher, EC ;

Li, LS ;

Alivisatos, AP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (24) :7136-7145