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In the present study, for the first time, aluminum-doped zinc oxide (AZO) thin films with nanoinclusions of amorphous carbon have been synthesized via spin coating, and the thermoelectric performances were investigated varying the aging period of the solution, the procedure of carbon nanoparticles’ addition, and the annealing atmosphere. The addition of nanoparticles has been pursued to introduce phonon scattering centers to reduce thermal conductivity. All the samples showed a strong orientation along the [002] crystallographic direction, even though the substrate is amorphous silica, with an intensity of the diffraction peaks reaching its maximum in samples annealed in the presence of hydrogen, and generally decreasing by the addition of carbon nanoparticles. Absolute values of the Seebeck coefficient improve when nanoparticles are added. At the same time, electric conductivity is higher for the sample with 1 wt.% of carbon and annealed in Ar with 1% of H2, both increasing in absolute value with the temperature rise. Among all the samples, the lowest thermal conductivity value of 1.25 W/(m·K) was found at room temperature, and the highest power factor was 111 μW/(m·K2) at 325 ◦C. Thus, the introduction of carbon effectively reduced thermal conductivity, while also increasing the power factor, giving promising results for the further development of AZO-based materials for thermoelectric applications.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: thermoelectric

刊行年月日: 2025-01-19

出版者: MDPI AG

掲載誌:

• Coatings (ISSN: 20796412) vol. 15 issue. 1

研究助成金:

• Research Foundation—Flanders (FWO) 1273621N
• JST Mirai JPMJMI19A1 1273621N

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.3390/coatings15010107

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更新時刻: 2025-11-11 08:30:17 +0900

MDRでの公開時刻: 2025-11-11 08:22:16 +0900