High-temperature thermoelectric properties of nanostructured Ca 3Co4O9 thin films

Min Gyu Kang; Kwang Hwan Cho; Seung Min Oh; Jin Sang Kim; Chong Yun Kang; Sahn Nahm; Seok Jin Yoon

doi:10.1063/1.3574530

High-temperature thermoelectric properties of nanostructured Ca ₃Co₄O₉ thin films

Min Gyu Kang, Kwang Hwan Cho, Seung Min Oh, Jin Sang Kim, Chong Yun Kang, Sahn Nahm, Seok Jin Yoon

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

37 Citations (Scopus)

Abstract

We prepared nanostructured Ca₃Co₄O₉ (CCO) thin films by promoting localized epitaxial growth on polycrystalline Al ₂O₃ substrates. The thermoelectric properties of the CCO films were studied in the temperature range 300 to 1023 K. We confirmed that localized epitaxial growth occurred on the seed grains that dominate the (006) plane. The nanostructured CCO thin films were found to have a maximum Seebeck coefficient of 206 μV/K and a power factor (at 920 K) of 0.514 mW/ mK ². Moreover, the presence of nanostructure was found to reduce the thermal conductivity, and thus, should enhance the overall performance of CCO films in thermoelectric devices.

Original language	English
Article number	142102
Journal	Applied Physics Letters
Volume	98
Issue number	14
DOIs	https://doi.org/10.1063/1.3574530
Publication status	Published - 2011 Apr 4

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.3574530

Cite this

@article{f2a1080596c84c56a13cf5fcfb9abd9a,

title = "High-temperature thermoelectric properties of nanostructured Ca 3Co4O9 thin films",

abstract = "We prepared nanostructured Ca3Co4O9 (CCO) thin films by promoting localized epitaxial growth on polycrystalline Al 2O3 substrates. The thermoelectric properties of the CCO films were studied in the temperature range 300 to 1023 K. We confirmed that localized epitaxial growth occurred on the seed grains that dominate the (006) plane. The nanostructured CCO thin films were found to have a maximum Seebeck coefficient of 206 μV/K and a power factor (at 920 K) of 0.514 mW/ mK 2. Moreover, the presence of nanostructure was found to reduce the thermal conductivity, and thus, should enhance the overall performance of CCO films in thermoelectric devices.",

author = "Kang, {Min Gyu} and Cho, {Kwang Hwan} and Oh, {Seung Min} and Kim, {Jin Sang} and Kang, {Chong Yun} and Sahn Nahm and Yoon, {Seok Jin}",

note = "Funding Information: This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy (Grant No. K0004114), and the Converging Research Center Program by the Ministry of Education, Science and Technology (Grant No. 2010K000979), Republic of Korea",

year = "2011",

month = apr,

day = "4",

doi = "10.1063/1.3574530",

language = "English",

volume = "98",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "14",

}

TY - JOUR

T1 - High-temperature thermoelectric properties of nanostructured Ca 3Co4O9 thin films

AU - Kang, Min Gyu

AU - Cho, Kwang Hwan

AU - Oh, Seung Min

AU - Kim, Jin Sang

AU - Kang, Chong Yun

AU - Nahm, Sahn

AU - Yoon, Seok Jin

N1 - Funding Information: This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy (Grant No. K0004114), and the Converging Research Center Program by the Ministry of Education, Science and Technology (Grant No. 2010K000979), Republic of Korea

PY - 2011/4/4

Y1 - 2011/4/4

N2 - We prepared nanostructured Ca3Co4O9 (CCO) thin films by promoting localized epitaxial growth on polycrystalline Al 2O3 substrates. The thermoelectric properties of the CCO films were studied in the temperature range 300 to 1023 K. We confirmed that localized epitaxial growth occurred on the seed grains that dominate the (006) plane. The nanostructured CCO thin films were found to have a maximum Seebeck coefficient of 206 μV/K and a power factor (at 920 K) of 0.514 mW/ mK 2. Moreover, the presence of nanostructure was found to reduce the thermal conductivity, and thus, should enhance the overall performance of CCO films in thermoelectric devices.

AB - We prepared nanostructured Ca3Co4O9 (CCO) thin films by promoting localized epitaxial growth on polycrystalline Al 2O3 substrates. The thermoelectric properties of the CCO films were studied in the temperature range 300 to 1023 K. We confirmed that localized epitaxial growth occurred on the seed grains that dominate the (006) plane. The nanostructured CCO thin films were found to have a maximum Seebeck coefficient of 206 μV/K and a power factor (at 920 K) of 0.514 mW/ mK 2. Moreover, the presence of nanostructure was found to reduce the thermal conductivity, and thus, should enhance the overall performance of CCO films in thermoelectric devices.

UR - http://www.scopus.com/inward/record.url?scp=79954457118&partnerID=8YFLogxK

U2 - 10.1063/1.3574530

DO - 10.1063/1.3574530

M3 - Article

AN - SCOPUS:79954457118

SN - 0003-6951

VL - 98

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 14

M1 - 142102

ER -

High-temperature thermoelectric properties of nanostructured Ca ₃Co₄O₉ thin films

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this