Spontaneous Formation of Wurzite-CdS/Zinc Blende-CdTe Heterodimers through a Partial Anion Exchange Reaction

被引：110

作者：

Saruyama, Masaki ^{[1
]}

So, Yeong-Gi ^{[2
]}

Kimoto, Koji ^{[2
]}

Taguchi, Seiji ^{[3
]}

Kanemitsu, Yoshihiko ^{[3
]}

Teranishi, Toshiharu ^{[1
,3
]}

机构：

[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Dept Chem, Tsukuba, Ibaraki 3058571, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[3] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 44期

关键词：

HETEROSTRUCTURED NANOCRYSTALS; CATION-EXCHANGE; SULFIDE; NANOPARTICLES; RECOMBINATION; TRANSMISSION;

D O I：

10.1021/ja2078224

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ion exchange of ionic semiconductor nano-particles (NPs) is a facile Method for the synthesis Of type-II semiconductor. heterostructured NPs-with staggered alignment of band edges for photoelectric applications. Through consideration of the crystallographic orientation and strain at the heterointerface, well-designed heterostructures can be constructed through ion exchange reactions. Here we report the selective synthesis of anisotropically phase-segregated cadmium sulfide.(CdS)/cadmium telluride (CdTe) heterodimers via a novel anion exchange reaction of CdS NPs with an organic telluride precursor. The wurtzite-CdS/zinc blende-CdTe heterodimers in this study resulted from spontaneous phase segregation induced by the differences in the crystal structures of the two phases, accompanying a centrosymmetry breaking of the spherical CdS NPs. The CdS/CdTe heterodimers exhibited photoinduced spatial charge separation because of their staggered hand-edge alignment.

引用

页码：17598 / 17601

页数：4

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