Facile chemical synthesis and enhanced thermoelectric properties of Ag doped SnSe nanocrystals

Chia Hua Chien; Chung Chieh Chang; Cheng Lung Chen; Chuan Ming Tseng; Yu Ruei Wu; Maw Kuen Wu; Chih Hao Lee; Yang Yuan Chen

doi:10.1039/c7ra05819e

Facile chemical synthesis and enhanced thermoelectric properties of Ag doped SnSe nanocrystals

Chia Hua Chien, Chung Chieh Chang, Cheng Lung Chen, Chuan Ming Tseng, Yu Ruei Wu, Maw Kuen Wu, Chih Hao Lee, Yang Yuan Chen

School of Dental Technology

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

A two-step, surfactant-free solution growth process was utilized to synthesize p-type Ag doped SnSe nanocrystals in gram quantities. The formation mechanism of SnSe nanocrystals was studied by high resolution transmission electron microscopy, and it was shown that the main surface and edge facets are {100} and {011} respectively. A clear phase transition near 800 K was discovered in the temperature dependence of thermal conductivity. The thermoelectric properties of SnSe pellets prepared by spark plasma sintering exhibit a significant increase of zT_max (0.8 at 850 K) in the 3% Ag doped SnSe. The zT_max value is about 40% higher than that of the pristine SnSe. The consequence is mainly attributed to the enhancement of carrier concentration and power factor by Ag doping. Our results demonstrate that this facile chemical method is amenable to fabricate high quality SnSe nanocrystals and might also be applied to other anisotropic crystalline materials.

Original language	English
Pages (from-to)	34300-34306
Number of pages	7
Journal	RSC Advances
Volume	7
Issue number	54
DOIs	https://doi.org/10.1039/c7ra05819e
Publication status	Published - Jan 1 2017

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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10.1039/c7ra05819e

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title = "Facile chemical synthesis and enhanced thermoelectric properties of Ag doped SnSe nanocrystals",

abstract = "A two-step, surfactant-free solution growth process was utilized to synthesize p-type Ag doped SnSe nanocrystals in gram quantities. The formation mechanism of SnSe nanocrystals was studied by high resolution transmission electron microscopy, and it was shown that the main surface and edge facets are {100} and {011} respectively. A clear phase transition near 800 K was discovered in the temperature dependence of thermal conductivity. The thermoelectric properties of SnSe pellets prepared by spark plasma sintering exhibit a significant increase of zTmax (0.8 at 850 K) in the 3% Ag doped SnSe. The zTmax value is about 40% higher than that of the pristine SnSe. The consequence is mainly attributed to the enhancement of carrier concentration and power factor by Ag doping. Our results demonstrate that this facile chemical method is amenable to fabricate high quality SnSe nanocrystals and might also be applied to other anisotropic crystalline materials.",

author = "Chien, {Chia Hua} and Chang, {Chung Chieh} and Chen, {Cheng Lung} and Tseng, {Chuan Ming} and Wu, {Yu Ruei} and Wu, {Maw Kuen} and Lee, {Chih Hao} and Chen, {Yang Yuan}",

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T1 - Facile chemical synthesis and enhanced thermoelectric properties of Ag doped SnSe nanocrystals

AU - Chien, Chia Hua

AU - Chang, Chung Chieh

AU - Chen, Cheng Lung

AU - Tseng, Chuan Ming

AU - Wu, Yu Ruei

AU - Wu, Maw Kuen

AU - Lee, Chih Hao

AU - Chen, Yang Yuan

PY - 2017/1/1

Y1 - 2017/1/1

N2 - A two-step, surfactant-free solution growth process was utilized to synthesize p-type Ag doped SnSe nanocrystals in gram quantities. The formation mechanism of SnSe nanocrystals was studied by high resolution transmission electron microscopy, and it was shown that the main surface and edge facets are {100} and {011} respectively. A clear phase transition near 800 K was discovered in the temperature dependence of thermal conductivity. The thermoelectric properties of SnSe pellets prepared by spark plasma sintering exhibit a significant increase of zTmax (0.8 at 850 K) in the 3% Ag doped SnSe. The zTmax value is about 40% higher than that of the pristine SnSe. The consequence is mainly attributed to the enhancement of carrier concentration and power factor by Ag doping. Our results demonstrate that this facile chemical method is amenable to fabricate high quality SnSe nanocrystals and might also be applied to other anisotropic crystalline materials.

AB - A two-step, surfactant-free solution growth process was utilized to synthesize p-type Ag doped SnSe nanocrystals in gram quantities. The formation mechanism of SnSe nanocrystals was studied by high resolution transmission electron microscopy, and it was shown that the main surface and edge facets are {100} and {011} respectively. A clear phase transition near 800 K was discovered in the temperature dependence of thermal conductivity. The thermoelectric properties of SnSe pellets prepared by spark plasma sintering exhibit a significant increase of zTmax (0.8 at 850 K) in the 3% Ag doped SnSe. The zTmax value is about 40% higher than that of the pristine SnSe. The consequence is mainly attributed to the enhancement of carrier concentration and power factor by Ag doping. Our results demonstrate that this facile chemical method is amenable to fabricate high quality SnSe nanocrystals and might also be applied to other anisotropic crystalline materials.

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EP - 34306

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ER -

Facile chemical synthesis and enhanced thermoelectric properties of Ag doped SnSe nanocrystals

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