Optical properties of core/multishell CdSe/Zn(S,Se) nanocrystals

被引:31
作者
Bleuse, J
Carayon, S
Reiss, P
机构
[1] CEA, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France
[2] UJF, CNRS, CEA,Grp Nanophys & Semicond, Serv Phys Mat & Microstruct, Grenoble, France
关键词
nanocrystal; CdSe; shell; ZnSe;
D O I
10.1016/j.physe.2003.11.044
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
CdSe nanocrystals are now known as highly efficient fluorescent light sources. Their efficiency is however strongly dependent on the quality of the passivation layers. We show here that using a ZnSe/ZnS bi-layer shell leads to a larger photoluminescence yield than both ZnSe and ZnS simple shells. The intermediate ZnSe layer acts as a lattice parameter adaptation layer to improve on the core/shell interface quality, while the ZnS outer shell maximizes the exciton confinement. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:331 / 335
页数:5
相关论文
共 17 条
[1]  
Bastard G., 1992, WAVE MECH APPL SEMIC
[2]   INVESTIGATION OF THE SURFACE-MORPHOLOGY OF CAPPED CDSE NANOCRYSTALLITES BY P-31 NUCLEAR-MAGNETIC-RESONANCE [J].
BECERRA, LR ;
MURRAY, CB ;
GRIFFIN, RG ;
BAWENDI, MG .
JOURNAL OF CHEMICAL PHYSICS, 1994, 100 (04) :3297-3300
[3]   Semiconductor nanocrystals as fluorescent biological labels [J].
Bruchez, M ;
Moronne, M ;
Gin, P ;
Weiss, S ;
Alivisatos, AP .
SCIENCE, 1998, 281 (5385) :2013-2016
[4]   Quantum dot bioconjugates for ultrasensitive nonisotopic detection [J].
Chan, WCW ;
Nie, SM .
SCIENCE, 1998, 281 (5385) :2016-2018
[5]   (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
[6]   Time-gated biological imaging by use of colloidal quantum dots [J].
Dahan, M ;
Laurence, T ;
Pinaud, F ;
Chemla, DS ;
Alivisatos, AP ;
Sauer, M ;
Weiss, S .
OPTICS LETTERS, 2001, 26 (11) :825-827
[7]   Study of the band alignment in (Zn, Cd)Se/ZnSe quantum wells by means of photoluminescence excitation spectroscopy [J].
Guénaud, C ;
Deleporte, E ;
Filoramo, A ;
Lelong, P ;
Delalande, C ;
Morhain, C ;
Tournié, E ;
Faurie, JP .
JOURNAL OF APPLIED PHYSICS, 2000, 87 (04) :1863-1868
[8]   Synthesis and characterization of strongly luminescing ZnS-Capped CdSe nanocrystals [J].
Hines, MA ;
Guyot-Sionnest, P .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (02) :468-471
[9]   Band alignment in ZnCdTe/ZnTe and ZnCdSe/ZnSe SQW structures grown on GaAs(100) by MBE [J].
Kozlovsky, VI ;
Sadofyev, YG ;
Litvinov, VG .
NANOTECHNOLOGY, 2000, 11 (04) :241-245
[10]  
KOZLOVSKY VI, 1982, CRYSTAL SOLID STAT B, V17