Thermoelectric quantum-dot superlattices with high ZT
Following the experimentally observed Seebeck coefficient enhancement in PbTe quantum wells in Pb{sub 1{minus}x}Eu{sub x}Te/PbTe multiple-quantum-well structures which indicated the potential usefulness of low dimensionality, the authors have investigated the thermoelectric properties of PbSe{sub x}Te{sub 1{minus}x}/PbTe quantum-dot superlattices for possible improved thermoelectric materials. They have again found enhancements in Seebeck coefficient and thermoelectric figure of merit (ZT) relative to bulk values, which occur through the various physics and materials science phenomena associated with the quantum-dot structures. To date, they have obtained estimated ZT values approximately double the best bulk PbTe values, with estimated ZT as high as about 0.9 at 300 K.
- Research Organization:
- Massachusetts Inst. of Tech., Lexington, MA (US)
- OSTI ID:
- 20015398
- Journal Information:
- Journal of Electronic Materials, Vol. 29, Issue 1; Conference: 5th Biennial Workshop on Organometallic Vapor Phase Epitaxy, Ponte Vedra Beach, Fl (US), 05/23/1999--05/27/1999; Other Information: PBD: Jan 2000; ISSN 0361-5235
- Country of Publication:
- United States
- Language:
- English
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