Tunable p- and n-Type Tellurium-Free Mg3Bi2 Thermoelectric Thin Films by Thermal Coevaporation
Joost W. C. Reinders,
Cristina Roldán-Carmona,
Henk J. Bolink
et al.
Abstract:Mg3Bi2 has recently emerged as
a promising
environmentally friendly alternative to bismuth tellurides for near-room-temperature
thermoelectrics. Here, we report on the fabrication of Mg3Bi2 thin films under Mg-rich and Mg-poor conditions via
vacuum thermal coevaporation. We demonstrate that under Mg-deficient
conditions thin films show a p-type conduction behavior with a maximum
power factor exceeding 300 μW m–1 K–2 and a thermoelectric figure of merit ZT of 0.11
at 200 °C. Increasing the amount of Mg enables … Show more
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