Alloying Buffer Layers in Colloidal CdSe/ZnS Core/Shell Nanocrystals

被引：1

作者：

Zhang, Huichao ^{[1
]}

Ye, Yonghong ^{[2
]}

Yang, Boping ^{[1
]}

Shen, Li ^{[1
]}

Cui, Yiping ^{[1
]}

Zhang, Jiayu ^{[1
]}

机构：

[1] Southeast Univ, Dept Elect Engn, Nanjing 210096, Jiangsu, Peoples R China

[2] Nanjing Normal Univ, Dept Phys, Nanjing 210097, Jiangsu, Peoples R China

来源：

AUSTRALIAN JOURNAL OF CHEMISTRY | 2014年 / 67卷 / 06期

基金：

中国国家自然科学基金;

关键词：

LARGE-SCALE SYNTHESIS; QUANTUM DOTS; CORE/MULTISHELL NANOCRYSTALS; CDSE/CDS HETERONANOCRYSTALS; SEMICONDUCTOR NANOCRYSTALS; IN-VIVO; PHOTOLUMINESCENCE; SPECTROSCOPY; INTERFACE; RANGE;

D O I：

10.1071/CH13574

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

When a ZnS shell is coated onto a CdSe core, some non-radiative defects are formed with the relaxation of the strain induced by the large lattice mismatch between CdSe and ZnS even though there are Zn0.5Cd0.5Se or ZnSe buffer layers, as indicated by the decrease of photoluminescent (PL) quantum yield and the reverse evolution of temperature-dependent time-resolved PL decay. X-Ray photoelectron spectroscopy analysis reveals that these defects are induced by the formation of an interfacial alloy during the epitaxy process. These defects could be significantly suppressed if the ZnxCd1-xSeyS1-y alloy buffer layer is artificially introduced.

引用

页码：844 / 850

页数：7

共 50 条

[1] Spontaneous photoluminescence oscillation in a colloidal dispersion of CdSe/ZnS core/shell nanocrystals
Komoto, A
Maenosono, S
Yamaguchi, Y
[J]. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2004, 24 (1-2): : 74 - 77
[2] Optical Absorption of Proton Irradiated Colloidal CdSe/ZnS Core/Shell Nanocrystals
Narsingi, K. Y.
Li, Shibin
Manasreh, M. Omar
Weaver, Bradley D.
[J]. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2010, 57 (05) : 2929 - 2932
[3] CdSe/CdS/ZnS and CdSe/ZnSe/ZnS core-shell-shell nanocrystals
Talapin, DV
Mekis, I
Götzinger, S
Kornowski, A
Benson, O
Weller, H
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (49): : 18826 - 18831
[4] Dependence of Microstructure and Luminescence on Shell Layers in Colloidal CdSe/CdS Core/Shell Nanocrystals
Zhang, Jiaming
Zhang, Xuke
Zhang, J. Y.
[J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (09): : 3904 - 3908
[5] Optical properties of colloidal InGaP/ZnS core/shell nanocrystals
Joshi, Abhishek
Manasreh, M. O.
Davis, E. A.
Weaver, B. D.
[J]. APPLIED PHYSICS LETTERS, 2006, 89 (11)
[6] High resolution photoemission study of CdSe and CdSe/ZnS core-shell nanocrystals
Borchert, H
Talapin, DV
McGinley, C
Adam, S
Lobo, A
de Castro, ARB
Möller, T
Weller, H
[J]. JOURNAL OF CHEMICAL PHYSICS, 2003, 119 (03): : 1800 - 1807
[7] Temperature dependence of the band gap of colloidal CdSe/ZnS core/shell nanocrystals embedded into an ultraviolet curable resin
Joshi, Abhishek
Narsingi, K. Y.
Manasreh, M. O.
Davis, E. A.
Weaver, B. D.
[J]. APPLIED PHYSICS LETTERS, 2006, 89 (13)
[8] Biologically programmed synthesis of core-shell CdSe/ZnS nanocrystals
Singh, Shailendra
Bozhilov, Krassimir
Mulchandani, Ashok
Myung, Nosang
Chen, Wilfred
[J]. CHEMICAL COMMUNICATIONS, 2010, 46 (09) : 1473 - 1475
[9] Probing photoluminescence dynamics of colloidal CdSe/ZnS core/shell nanoparticles
Kaur, Gurvir
Tripathi, S. K.
[J]. JOURNAL OF LUMINESCENCE, 2014, 155 : 330 - 337
[10] Exciton relaxation processes in colloidal core/shell ZnSe/ZnS nanocrystals
Lomascolo, M
Cretì, A
Leo, G
Vasanelli, L
Manna, L
[J]. APPLIED PHYSICS LETTERS, 2003, 82 (03) : 418 - 420

← 1 2 3 4 5 →