H - Electricity – 01 – L
Patent
H - Electricity
01
L
H01L 35/16 (2006.01) H01L 35/18 (2006.01)
Patent
CA 2152772
A superlattice comprising alternating layers of (PbTeSe)m and (BiSb)n (where m and n are the number of PbTeSe and BiSb monolayers per superlattice period, respectively) having engineered electronic structures for improved thermoelectric cooling materials (and other uses) may be grown by molecular beam epitaxial growth. Preferably, for short periods, n + m < 50. However, superlattice films with 10,000 or more such small periods may be grown. For example, the superlattice may comprise alternating layers of (PbTe1-zSez)m and (BixSb1-x)n- According to a preferred embodiment, the superlattice comprises a plurality of layers comprising m layers of pbTe0.8Se0.2 and n layers of Bi0.9Sb0.1, wbere m and n are preferably between 2 and 20.
Kirby Eades Gale Baker
Massachusetts Institute Of Technology
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