In addition to NASA applications, the proposed ultraefficient thermoelectric materials and devices are expected to find applications in such fields as electronic device cooling (microprocessors, focal plane arrays, etc.), food storage/processing (wine cellars, Freon-free refrigerators), automotive and aviation industry (to enhance the fuel consumption). Due to the unique performance expected from proposed materials and devices all these markets can be potentially addressable with the proposed technology. The most promising market for initial penetration is believed to be the electronic component cooling market, where the benefits of the proposed technology (high efficiency combined with potentially reduced size) would provide the largest competitive advantage. The largest immediate NASA application of the proposed ultraefficient thermoelectric materials and devices is thermoelectric generators, already actively using in a large number of NASA missions. The advantages of the proposed technology (unmatched efficiency combined with the small size and low weight) would provide the competitive advantage to MicroXact sufficient for successful market penetration. Other potential NASA applications, including potential powering small devices from human thermal energy, etc. can be allowed by the proposed technology as well. Due to the unique benefits the proposed ultrahigh efficiency TE materials and devices are expected to penetrate these and other NASA applications. The proposed concept, when developed and commercialized, is expected to cause a significant impact on the cost, safety and reliability of future NASA missions.