TY - JOUR
T1 - A prototype thermoelectric module based on p-type colusite together with n-type nanostructured PbTe for power generation
AU - Chetty, Raju
AU - Jood, Priyanka
AU - Murata, Masayuki
AU - Suekuni, Koichiro
AU - Ohta, Michihiro
N1 - Funding Information:
The authors thank Ms. Naoko Fujimoto, Mr. Makoto Aihara, and Mr. Ichiro Okumura of the AIST for helping in the preparation and evaluation of materials and module. The authors express thanks to Mr. Noriyuki Saitou and Dr. Noriko Yoshizawa of AIST for operating the transmission electron microscope. The material preparation in this work was supported as part of the Development of Thermal Management Materials and Technology (JPNP15007) funded by the New Energy and Industrial Technology Development Organization (NEDO). Module fabrication and testing were supported as part of the International Joint Research Program for Innovative Energy Technology funded by the Ministry of Economy, Trade and Industry (METI) and Research and Development Program for Promoting Innovative Clean Energy Technologies Through International Collaboration (JPNP20005) funded by the NEDO.
Publisher Copyright:
© 2022 Author(s).
PY - 2022/1/3
Y1 - 2022/1/3
N2 - Thermoelectric power generation from the prototype π-shaped module composed of p-type colusite (Cu26Cr2Ge6S32) and n-type nanostructured PbTe (Pb0.98Ga0.02Te-3% GeTe) was demonstrated in this study. The thermoelectric figure of merit zT of Cu26Cr2Ge6S32 and Pb0.98Ga0.02Te-3% GeTe was ∼0.8 and ∼1.2 at 665 K, respectively. In PbTe, transmission electron microscopic images and energy-dispersive x-ray elemental maps reveal the insertion of nanoscale precipitates induced by the GeTe alloying. Contact layers based on Au and Co-Fe were used for p- and n-type thermoelectric legs, respectively, which allow the low electrical specific contact resistances of ≤10 × 10-10 ω m2 at room temperature. Maximum thermoelectric conversion efficiency ηmax of ∼5.5% was obtained for the Cu26Cr2Ge6S32 and Pb0.98Ga0.02Te-3% GeTe-based two-pair module when the hot-side Th and cold-side Tc temperatures were maintained at 673 and 283 K, respectively. A three-dimensional finite-element simulation predicts the ηmax of ∼7.1% for the module at Th and Tc of 673 and 283 K, respectively.
AB - Thermoelectric power generation from the prototype π-shaped module composed of p-type colusite (Cu26Cr2Ge6S32) and n-type nanostructured PbTe (Pb0.98Ga0.02Te-3% GeTe) was demonstrated in this study. The thermoelectric figure of merit zT of Cu26Cr2Ge6S32 and Pb0.98Ga0.02Te-3% GeTe was ∼0.8 and ∼1.2 at 665 K, respectively. In PbTe, transmission electron microscopic images and energy-dispersive x-ray elemental maps reveal the insertion of nanoscale precipitates induced by the GeTe alloying. Contact layers based on Au and Co-Fe were used for p- and n-type thermoelectric legs, respectively, which allow the low electrical specific contact resistances of ≤10 × 10-10 ω m2 at room temperature. Maximum thermoelectric conversion efficiency ηmax of ∼5.5% was obtained for the Cu26Cr2Ge6S32 and Pb0.98Ga0.02Te-3% GeTe-based two-pair module when the hot-side Th and cold-side Tc temperatures were maintained at 673 and 283 K, respectively. A three-dimensional finite-element simulation predicts the ηmax of ∼7.1% for the module at Th and Tc of 673 and 283 K, respectively.
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U2 - 10.1063/5.0077154
DO - 10.1063/5.0077154
M3 - Article
AN - SCOPUS:85123050971
VL - 120
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 1
M1 - 013501
ER -