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

Research output: Contribution to journalArticle

9 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 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.

Original languageEnglish
Pages (from-to)34300-34306
Number of pages7
JournalRSC Advances
Volume7
Issue number54
DOIs
Publication statusPublished - Jan 1 2017

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Nanocrystals
Spark plasma sintering
High resolution transmission electron microscopy
Surface-Active Agents
Carrier concentration
Thermal conductivity
Surface active agents
Phase transitions
Doping (additives)
Crystalline materials
Temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Chien, C. H., Chang, C. C., Chen, C. L., Tseng, C. M., Wu, Y. R., Wu, M. K., ... Chen, Y. Y. (2017). Facile chemical synthesis and enhanced thermoelectric properties of Ag doped SnSe nanocrystals. RSC Advances, 7(54), 34300-34306. https://doi.org/10.1039/c7ra05819e

Facile chemical synthesis and enhanced thermoelectric properties of Ag doped SnSe nanocrystals. / Chien, Chia Hua; Chang, Chung Chieh; Chen, Cheng Lung; Tseng, Chuan Ming; Wu, Yu Ruei; Wu, Maw Kuen; Lee, Chih Hao; Chen, Yang Yuan.

In: RSC Advances, Vol. 7, No. 54, 01.01.2017, p. 34300-34306.

Research output: Contribution to journalArticle

Chien, CH, Chang, CC, Chen, CL, Tseng, CM, Wu, YR, Wu, MK, Lee, CH & Chen, YY 2017, 'Facile chemical synthesis and enhanced thermoelectric properties of Ag doped SnSe nanocrystals', RSC Advances, vol. 7, no. 54, pp. 34300-34306. https://doi.org/10.1039/c7ra05819e
Chien, Chia Hua ; Chang, Chung Chieh ; Chen, Cheng Lung ; Tseng, Chuan Ming ; Wu, Yu Ruei ; Wu, Maw Kuen ; Lee, Chih Hao ; Chen, Yang Yuan. / Facile chemical synthesis and enhanced thermoelectric properties of Ag doped SnSe nanocrystals. In: RSC Advances. 2017 ; Vol. 7, No. 54. pp. 34300-34306.
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