Characterization of CdSe and CdSe/CdS core/shell nanoclusters synthesized in aqueous solution

被引：86

作者：

Liu, SM

Guo, HQ

Zhang, ZH

Li, R

Chen, W

Wang, ZG

机构：

[1] Chinese Acad Sci, Inst Semicond, Lab Semicond Mat Sci, Beijing 100083, Peoples R China

[2] Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China

来源：

PHYSICA E | 2000年 / 8卷 / 02期

基金：

中国国家自然科学基金;

关键词：

CdSe; CdSe/CdS; nanoclusters;

D O I：

10.1016/S1386-9477(99)00260-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

CdSe nanoclusters overcoated with CdS shell were prepared with macapoacetic acid as stabilizer. The optical properties of CdSe nanoclusters and the influence of CdS shell on the electronic structures of CdSe cores were studied by optical absorption, photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopies. Based on PL and PLE results and the theoretical calculation on fine structure of bandedge exciton, a model of formation of excimer within the small clusters was proposed to explain the large Stokes shift of luminescence from absorption edge observed in PL results. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：174 / 178

页数：5

共 14 条

[1] ELECTRONIC-STRUCTURE AND PHOTOEXCITED-CARRIER DYNAMICS IN NANOMETER-SIZE CDSE CLUSTERS
BAWENDI, MG
WILSON, WL
ROTHBERG, L
CARROLL, PJ
JEDJU, TM
STEIGERWALD, ML
BRUS, LE
[J]. PHYSICAL REVIEW LETTERS, 1990, 65 (13) : 1623 - 1626
[2] (CdSe)ZnS core-shell quantum dots: Synthesis and characterization of a size series of highly luminescent nanocrystallites
Dabbousi, BO
RodriguezViejo, J
Mikulec, FV
Heine, JR
Mattoussi, H
Ober, R
Jensen, KF
Bawendi, MG
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (46) : 9463 - 9475
[3] Band-edge exciton in quantum dots of semiconductors with a degenerate valence band: Dark and bright exciton states
Efros, AL
Rosen, M
Kuno, M
Nirmal, M
Norris, DJ
Bawendi, M
[J]. PHYSICAL REVIEW B, 1996, 54 (07): : 4843 - 4856
[4] GUO HQ, IN PRESS MOL CRYST L
[5] HASSELBARTH A, 1993, J PHYS CHEM-US, V97, P5333
[6] SYNTHESIS AND CHARACTERIZATION OF SURFACE-CAPPED, SIZE-QUANTIZED CDS CLUSTERS - CHEMICAL CONTROL OF CLUSTER SIZE
HERRON, N
WANG, Y
ECKERT, H
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1990, 112 (04) : 1322 - 1326
[7] THRESHOLD FOR QUASI-CONTINUUM ABSORPTION AND REDUCED LUMINESCENCE EFFICIENCY IN CDSE NANOCRYSTALS
HOHEISEL, W
COLVIN, VL
JOHNSON, CS
ALIVISATOS, AP
[J]. JOURNAL OF CHEMICAL PHYSICS, 1994, 101 (10) : 8455 - 8460
[8] Properties of CdSe nanocrystal dispersions in the dilute regime: Structure and interparticle interactions
Mattoussi, H
Cumming, AW
Murray, CB
Bawendi, MG
Ober, R
[J]. PHYSICAL REVIEW B, 1998, 58 (12) : 7850 - 7863
[9] SYNTHESIS AND CHARACTERIZATION OF NEARLY MONODISPERSE CDE (E = S, SE, TE) SEMICONDUCTOR NANOCRYSTALLITES
MURRAY, CB
NORRIS, DJ
BAWENDI, MG
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1993, 115 (19) : 8706 - 8715
[10] OBSERVATION OF THE DARK EXCITON IN CDSE QUANTUM DOTS
NIRMAL, M
NORRIS, DJ
KUNO, M
BAWENDI, MG
EFROS, AL
ROSEN, M
[J]. PHYSICAL REVIEW LETTERS, 1995, 75 (20) : 3728 - 3731

← 1 2 →