ORAU
Advanced High Temperature Thermoelectric Materials Research
ORAU, Pasadena, California, United States, 91122
Overview
The NASA Postdoctoral Program (NPP) offers unique research opportunities to highly-talented scientists to engage in ongoing NASA research projects at a NASA Center, NASA Headquarters, or at a NASA-affiliated research institute. These one- to three-year fellowships are competitive and are designed to advance NASA’s missions in space science, Earth science, aeronautics, space operations, exploration systems, and astrobiology. Description
NASA's Science Mission Directorate is developing the next generation of technologies that will lead to significant increases in both thermal-to-electric conversion efficiency and specific power of future radioisotope power systems, in support of potential future deep space and planetary science and exploration missions (Strategic Goal 3). This technology could also be attractive to several terrestrial applications opportunities in the areas of waste heat recovery, energy harvesting and auxiliary power units (Strategic Goals 3 and 4). NASA/JPL is leading a collaborative multi-prong research effort to identify and characterize advanced bulk thermoelectric (TE) materials with dimensionless TE figure of merit (ZT) values of up to 2.0 across the entire temperature range of 1275 K to 500 K, and capable of long term high temperature operation in a vacuum or inert atmosphere environment (at least 17 years). This would represent a factor of 3 improvement over current proven heritage technology. Research Areas
The first research area concerns mostly families of refractory complex structure compounds, including a number of ternary Zintl phases and materials related to La3-xTe4, which exhibit an attractive combination of very low lattice thermal conductivity and good electrical transport properties at elevated temperatures. This research area covers a wide phase space and effective theoretical guidance through first principle electronic structure calculations is being actively pursued. The other two materials research areas focus on synthesizing bulk 3-D nanostructures that emulate results obtained on low dimensional superlattices through force engineering and self-assembling techniques. Such materials present orders of magnitude increases in the density of interfaces, thus scattering phonons very effectively and leading to very large reductions in lattice thermal conductivity values. In addition, careful control of the charge carrier concentration and energy has been predicted to lead to an enhanced carrier mobility and Seebeck coefficient. Promising results have been obtained for Si/Si1-xGex or silicide nanocomposites prepared from Si1-xGex nanoparticles and random self-assembled nanostructures based on telluride TE materials. Other materials of interest include compounds that can host nanoscale features such as Si- and Ge-based clathrates, skutterudite antimonides and PbTe-based chalcogenides. The scope of the Advanced TE Task also includes proof-of-principle device-level demonstrations of the improved conversion efficiency of the most promising materials. References: [1] J.P. Fleurial, Thermoelectric Power Generation Materials: Technology and Application Opportunities, JOM, 61, 4, 79-85, (2009). [2] G. J. Snyder and E. Toberer, Complex Thermoelectric Materials, Nature Materials, 7, 105 - 114 (2008). Location
Jet Propulsion Laboratory, Pasadena, California Field of Science
Planetary Science Advisors
Jean-Pierre Fleurial Jean-Pierre.Fleurial@jpl.nasa.gov 818-354-4144 Questions about this opportunity? Please email npp@orau.org Point of Contact: Mikeala Reference Code
0099-NPP-NOV25-JPL-PlanetSci How To Apply
All applications must be submitted in Zintellect. Please visit the NASA Postdoctoral Program website for application instructions and requirements: How to Apply | NASA Postdoctoral Program (orau.org) A complete application to the NASA Postdoctoral Program includes: Research proposal Three letters of recommendation Official doctoral transcript documents Deadline
Application Deadline: 11/1/2025 6:00:59 PM Eastern Time Zone Eligibility and Requirements
Eligibility is currently open to: U.S. Citizens; U.S. Lawful Permanent Residents (LPR); Foreign Nationals eligible for an Exchange Visitor J-1 visa status; and, Applicants for LPR, asylees, or refugees in the U.S. at the time of application with 1) a valid EAD card and 2) I-485 or I-589 forms in pending status Citizens from Designated Countries: Applications with citizens from Designated Countries will not be accepted at this time, unless they are Legal Permanent Residents of the United States. A complete list is available at NASA export control. Questions about this opportunity? Please email npp@orau.org Project contact: Mikeala Eligibility Requirements
Degree: Doctoral Degree. Seniority level
Internship Employment type
Full-time Job function
Research, Analyst, and Information Technology Industries
Government Administration
#J-18808-Ljbffr
The NASA Postdoctoral Program (NPP) offers unique research opportunities to highly-talented scientists to engage in ongoing NASA research projects at a NASA Center, NASA Headquarters, or at a NASA-affiliated research institute. These one- to three-year fellowships are competitive and are designed to advance NASA’s missions in space science, Earth science, aeronautics, space operations, exploration systems, and astrobiology. Description
NASA's Science Mission Directorate is developing the next generation of technologies that will lead to significant increases in both thermal-to-electric conversion efficiency and specific power of future radioisotope power systems, in support of potential future deep space and planetary science and exploration missions (Strategic Goal 3). This technology could also be attractive to several terrestrial applications opportunities in the areas of waste heat recovery, energy harvesting and auxiliary power units (Strategic Goals 3 and 4). NASA/JPL is leading a collaborative multi-prong research effort to identify and characterize advanced bulk thermoelectric (TE) materials with dimensionless TE figure of merit (ZT) values of up to 2.0 across the entire temperature range of 1275 K to 500 K, and capable of long term high temperature operation in a vacuum or inert atmosphere environment (at least 17 years). This would represent a factor of 3 improvement over current proven heritage technology. Research Areas
The first research area concerns mostly families of refractory complex structure compounds, including a number of ternary Zintl phases and materials related to La3-xTe4, which exhibit an attractive combination of very low lattice thermal conductivity and good electrical transport properties at elevated temperatures. This research area covers a wide phase space and effective theoretical guidance through first principle electronic structure calculations is being actively pursued. The other two materials research areas focus on synthesizing bulk 3-D nanostructures that emulate results obtained on low dimensional superlattices through force engineering and self-assembling techniques. Such materials present orders of magnitude increases in the density of interfaces, thus scattering phonons very effectively and leading to very large reductions in lattice thermal conductivity values. In addition, careful control of the charge carrier concentration and energy has been predicted to lead to an enhanced carrier mobility and Seebeck coefficient. Promising results have been obtained for Si/Si1-xGex or silicide nanocomposites prepared from Si1-xGex nanoparticles and random self-assembled nanostructures based on telluride TE materials. Other materials of interest include compounds that can host nanoscale features such as Si- and Ge-based clathrates, skutterudite antimonides and PbTe-based chalcogenides. The scope of the Advanced TE Task also includes proof-of-principle device-level demonstrations of the improved conversion efficiency of the most promising materials. References: [1] J.P. Fleurial, Thermoelectric Power Generation Materials: Technology and Application Opportunities, JOM, 61, 4, 79-85, (2009). [2] G. J. Snyder and E. Toberer, Complex Thermoelectric Materials, Nature Materials, 7, 105 - 114 (2008). Location
Jet Propulsion Laboratory, Pasadena, California Field of Science
Planetary Science Advisors
Jean-Pierre Fleurial Jean-Pierre.Fleurial@jpl.nasa.gov 818-354-4144 Questions about this opportunity? Please email npp@orau.org Point of Contact: Mikeala Reference Code
0099-NPP-NOV25-JPL-PlanetSci How To Apply
All applications must be submitted in Zintellect. Please visit the NASA Postdoctoral Program website for application instructions and requirements: How to Apply | NASA Postdoctoral Program (orau.org) A complete application to the NASA Postdoctoral Program includes: Research proposal Three letters of recommendation Official doctoral transcript documents Deadline
Application Deadline: 11/1/2025 6:00:59 PM Eastern Time Zone Eligibility and Requirements
Eligibility is currently open to: U.S. Citizens; U.S. Lawful Permanent Residents (LPR); Foreign Nationals eligible for an Exchange Visitor J-1 visa status; and, Applicants for LPR, asylees, or refugees in the U.S. at the time of application with 1) a valid EAD card and 2) I-485 or I-589 forms in pending status Citizens from Designated Countries: Applications with citizens from Designated Countries will not be accepted at this time, unless they are Legal Permanent Residents of the United States. A complete list is available at NASA export control. Questions about this opportunity? Please email npp@orau.org Project contact: Mikeala Eligibility Requirements
Degree: Doctoral Degree. Seniority level
Internship Employment type
Full-time Job function
Research, Analyst, and Information Technology Industries
Government Administration
#J-18808-Ljbffr