Self-reorganization of CdTe nanoparticles into two-dimensional Bi2Te3/CdTe nanosheets and their thermoelectrical properties

被引：11

作者：

Yang, Jie ^{[1
,2
]}

Gao, Yan ^{[2
]}

Kim, Jeoung Woo ^{[3
]}

He, Yujian ^{[1
]}

Song, Rui ^{[1
]}

Ahn, Chi Won ^{[3
]}

Tang, Zhiyong ^{[2
]}

机构：

[1] Chinese Acad Sci, Coll Chem & Chem Engn, Grad Univ, Beijing, Peoples R China

[2] Natl Ctr Nanosci & Technol, Beijing, Peoples R China

[3] Natl Nanofab Ctr, Taejon, South Korea

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2010年 / 12卷 / 38期

基金：

美国国家科学基金会;

关键词：

TELLURIDE NANOWIRE ARRAYS; HYDROTHERMAL SYNTHESIS; HIGH-DENSITY; LARGE-AREA; BISMUTH; ELECTRODEPOSITION; PERFORMANCE; NANOSTRUCTURES; NANOCRYSTALS; FABRICATION;

D O I：

10.1039/c0cp00079e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A partial cation exchange reaction between CdTe nanoparticles and Bi3+ ions gives rise to spontaneous formation of two-dimensional Bi2Te3/CdTe nanosheets. The average size and thickness of the nanosheets are around 200 and 6.9 nm, respectively. Both CdTe and Bi2Te3, which are there as the form of nanoparticles with average sizes of 3.4 nm, are found to be homogenously distributed in the nanosheets. The Bi2Te3/CdTe nanosheets are further integrated into a pellet by using spark plasma sintering for optimizing thermoelectric performance. Compared with the bulk n-type Bi2Te3, the pellets composed of Bi2Te3/CdTe nanosheets exhibit a considerably low thermal conductivity, 0.63 W m(-1) K-1, and a slightly high Seebeck coefficient, -182.2 mu V K-1, at room temperature.

引用

页码：11900 / 11904

页数：5

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