Incorporation of Au nanoparticles into thermoelectric mesoporous ZnO using a reverse triblock copolymer to enhance electrical conductivity

Min Hee Hong; Wooje Han; Hyung Ho Park

doi:10.1016/j.matchemphys.2018.03.077

Incorporation of Au nanoparticles into thermoelectric mesoporous ZnO using a reverse triblock copolymer to enhance electrical conductivity

Min Hee Hong, Wooje Han, Hyung Ho Park

Department of Materials Science and Engineering

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

5 Citations (Scopus)

Abstract

Since the thermoelectric properties are proportional to the electrical conductivity and inversely proportional to the thermal conductivity, independent control of thermal conductivity and electrical conductivity is essential. Therefore, in this study, mesoporous structure was applied to decrease thermal conductivity. And, Au NPs were incorporated to increase the electrical conductivity. Reverse triblock copolymer and cosolvent system were introduced for uniform dispersion of Au NPs. The collapse of the pore structure was minimized due to the uniform dispersion of Au NPs and the porosity increased by 10% from 20% to 30% when compared with pristine ZnO thin films. A mesoporous ZnO composite thin film containing 1 at.% Au NPs exhibited an electrical conductivity that was five times greater than that of a pristine mesoporous ZnO thin film. In addition, the power factor increased by about 3.5 times, from 9.53 ± 1.50 μW/mK² to 32.72 ± 5.16 μW/mK² at 503 K.

Original language	English
Pages (from-to)	499-505
Number of pages	7
Journal	Materials Chemistry and Physics
Volume	212
DOIs	https://doi.org/10.1016/j.matchemphys.2018.03.077
Publication status	Published - 2018 Jun 15

Bibliographical note

Funding Information:
This work was supported by ' Korea-Africa Joint Research Program ' grant funded by the Korea government (Ministry of Science, Technology & ICT) in 2017K1A3A1A09085891 . This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education ( NRF-2015R1D1A1A02062229 ). Experiments at PLS were supported in part by MEST and POSTECH .

Publisher Copyright:
© 2018 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics

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10.1016/j.matchemphys.2018.03.077

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title = "Incorporation of Au nanoparticles into thermoelectric mesoporous ZnO using a reverse triblock copolymer to enhance electrical conductivity",

abstract = "Since the thermoelectric properties are proportional to the electrical conductivity and inversely proportional to the thermal conductivity, independent control of thermal conductivity and electrical conductivity is essential. Therefore, in this study, mesoporous structure was applied to decrease thermal conductivity. And, Au NPs were incorporated to increase the electrical conductivity. Reverse triblock copolymer and cosolvent system were introduced for uniform dispersion of Au NPs. The collapse of the pore structure was minimized due to the uniform dispersion of Au NPs and the porosity increased by 10% from 20% to 30% when compared with pristine ZnO thin films. A mesoporous ZnO composite thin film containing 1 at.% Au NPs exhibited an electrical conductivity that was five times greater than that of a pristine mesoporous ZnO thin film. In addition, the power factor increased by about 3.5 times, from 9.53 ± 1.50 μW/mK2 to 32.72 ± 5.16 μW/mK2 at 503 K.",

author = "Hong, {Min Hee} and Wooje Han and Park, {Hyung Ho}",

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Y1 - 2018/6/15

N2 - Since the thermoelectric properties are proportional to the electrical conductivity and inversely proportional to the thermal conductivity, independent control of thermal conductivity and electrical conductivity is essential. Therefore, in this study, mesoporous structure was applied to decrease thermal conductivity. And, Au NPs were incorporated to increase the electrical conductivity. Reverse triblock copolymer and cosolvent system were introduced for uniform dispersion of Au NPs. The collapse of the pore structure was minimized due to the uniform dispersion of Au NPs and the porosity increased by 10% from 20% to 30% when compared with pristine ZnO thin films. A mesoporous ZnO composite thin film containing 1 at.% Au NPs exhibited an electrical conductivity that was five times greater than that of a pristine mesoporous ZnO thin film. In addition, the power factor increased by about 3.5 times, from 9.53 ± 1.50 μW/mK2 to 32.72 ± 5.16 μW/mK2 at 503 K.

AB - Since the thermoelectric properties are proportional to the electrical conductivity and inversely proportional to the thermal conductivity, independent control of thermal conductivity and electrical conductivity is essential. Therefore, in this study, mesoporous structure was applied to decrease thermal conductivity. And, Au NPs were incorporated to increase the electrical conductivity. Reverse triblock copolymer and cosolvent system were introduced for uniform dispersion of Au NPs. The collapse of the pore structure was minimized due to the uniform dispersion of Au NPs and the porosity increased by 10% from 20% to 30% when compared with pristine ZnO thin films. A mesoporous ZnO composite thin film containing 1 at.% Au NPs exhibited an electrical conductivity that was five times greater than that of a pristine mesoporous ZnO thin film. In addition, the power factor increased by about 3.5 times, from 9.53 ± 1.50 μW/mK2 to 32.72 ± 5.16 μW/mK2 at 503 K.

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Incorporation of Au nanoparticles into thermoelectric mesoporous ZnO using a reverse triblock copolymer to enhance electrical conductivity

Abstract

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