Characterization of commercial thermoelectric organic composite thin films

A series traditional thermoelectric films, including n-type Bi, Bi 2 Te 3 , and p-type Sb, Sb 2 Te 3 , were synthesized with CH 3 NH 3 I by combining magnetron sputtering and thermal evaporation method. It is found that the Seebeck coefficients for all the composite films have enhanced although the...

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Bibliographic Details
Published in:Journal of materials science 2019-07, Vol.54 (13), p.9565-9572
Main Authors: Li, Fu, Luo, Jing-ting, Zheng, Zhuang-hao, Liang, Guang-xing, Zhong, Ai-hua, Chen, Yue-xing, Fan, Ping
Format: Article
Language:English
Subjects:
Antimony
Bismuth tellurides
Carrier density
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composition
Crystallography and Scattering Methods
Dielectric films
Electric properties
Electrical conductivity
Electrical resistivity
Electronic Materials
Magnetron sputtering
Materials Science
Maximum power
Polymer Sciences
Power factor
Seebeck effect
Solid Mechanics
Thermal conductivity
Thermoelectricity
Thin films
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Summary:A series traditional thermoelectric films, including n-type Bi, Bi 2 Te 3 , and p-type Sb, Sb 2 Te 3 , were synthesized with CH 3 NH 3 I by combining magnetron sputtering and thermal evaporation method. It is found that the Seebeck coefficients for all the composite films have enhanced although the electrical conductivities reduced due to the decreased carrier concentration. This leads to an obvious improvement of the power factor, especially for p-type Sb 2 Te 3 -based organic–inorganic hybrid films. As expected, a maximum power factor value around 2.3 mWm −1 K −2 has been achieved for the composition of Sb 2 Te 3 /CH 3 NH 3 I in range of the whole measured temperature, which is nearly seven times higher than that of pristine Sb 2 Te 3 film. By combination with the reduced thermal conductivity, a ZT value nearly 1.0 has been obtained at 380 K for the composition of Sb 2 Te 3 /CH 3 NH 3 I.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-019-03596-4