About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Alloys and Compounds for Thermoelectric and Solar Cell Applications X
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Presentation Title |
High Thermoelectric Performance in n-type PbTe Enabled by Carrier Optimization and Nano-precipitates |
Author(s) |
Ping-Yuan Deng, Kung-Kuo Wang, Hsin-Jay Wu |
On-Site Speaker (Planned) |
Ping-Yuan Deng |
Abstract Scope |
Lead telluride has been the most attactive mid-temperature thermoelectric (TE) materials since the 1960s. However, the TE performance of the n-type PbTe is still low, which limits the overall conversion efficiency of a PbTe-based TE device. To make a breakthrough, the interstitial-Cu is incroporated into the PbTe to improve the power factor as result of elevating carrier mobility. The electromigration effect deteriorates the TE performance due to the nature of mobie Cu under the electrical current, showing poor thermal stability after mutiple cycling. Benefited from lightly Cu doping and VIA-element alloying, the Cu0.012M0.006(PbTe)0.988 (M = VIA elements) performs a peak zT ~ 1.5 at 598 K with high thermal stability after cycling. The co-existence of interstitial-Cu and VIA nano-precipitate maintain the large carrier mobility with a reduced kL, eliciting a high TE performance n-type PbTe that present high thermal stability below 600 K. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, |