Publications by authors named "Temesgen Debelo Desissa"
Article Synopsis
- An all-oxide thermoelectric generator relies on a low electrical resistance at the p-n junction formed by p-type CaCoO and n-type CaMnO.
- Heat treatment at 900 °C for 10 hours leads to counter diffusion of cations and the formation of a CaCoMnO interlayer, as well as precipitation of Co-oxides.
- Density functional theory calculations confirm the variability of the Co/Mn ratio in the interlayer and suggest a homogeneity range for CaCoMnO with a low mixing energy.
All-oxide thermoelectric modules for energy harvesting are attractive because of high-temperature stability, low cost, and the potential to use nonscarce and nontoxic elements. Thermoelectric modules are mostly fabricated in the conventional π-design, associated with the challenge of unstable metallic interconnects at high temperature. Here, we report on a novel approach for fabrication of a thermoelectric module with an in situ formed p-p-n junction made of state-of-the-art oxides CaCo O (p-type) and CaMnO-CaMnO composite (n-type).
View Article and Find Full Text PDFHigh-temperature instability of the Ca₃CoO and CaMnO direct p-n junction causing the formation of Ca₃CoMnO₆ has motivated the investigation of the thermoelectric performance of this intermediate phase. Here, the thermoelectric properties comprising Seebeck coefficient, electrical conductivity, and thermal conductivity of Ca₃CoMnO₆ with = 0.05, 0.
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