Keivan Esfarjani

US Patent:

20140070167, Mar 13, 2014

Filed:

Sep 4, 2013

Appl. No.:

14/017421

Inventors:

Bolin Liao - Cambridge MA, US
Keivan Esfarjani - East Brunswick NJ, US
Gang Chen - Carlisle MA, US

Assignee:

MASSACHUSETTS INSTITUTE OF TECHNOLOGY - Cambridge MA

International Classification:

H01L 29/15

US Classification:

257 22

Abstract:

An electrical mobility-controlled material includes a solid state host material having a controllable Fermi energy level and electrical charge carriers with a charge carrier mobility. At least one Fermi level energy at which a peak in charge carrier mobility is to occur is prespecified for the host material. A plurality of particles are distributed in the host material, with at least one particle disposed with an effective mass and a radius that minimize scattering of the electrical charge carriers for the at least one prespecified Fermi level energy of peak charge carrier mobility. The minimized scattering of electrical charge carriers produces the peak charge carrier mobility only at the at least one prespecified Fermi level energy, set by the particle effective mass and radius, the charge carrier mobility being less than the peak charge carrier mobility at Fermi level energies other than the at least one prespecified Fermi level energy.

US Patent:

20140109895, Apr 24, 2014

Filed:

Oct 22, 2013

Appl. No.:

14/060024

Inventors:

- Cambridge MA, US
- Chestnut Hill MA, US
Hui Wang - Brookline MA, US
Gang Chen - Carlisle MA, US
Xiaobo Li - Cambridge MA, US
Keivan Esfarjani - New Brunswick NJ, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA
The Trustees of Boston College - Chestnut Hill MA

International Classification:

F28D 20/02
F24J 2/34

US Classification:

126714, 16510417

Abstract:

Metallic composite phase-change materials and methods of using are disclosed. In some embodiments, a thermal energy storage module is provide that included one or more phase change alloys having a variable phase transition temperature between about 400 C. and about 1200 C. and having a latent heat of more than about 200 kJ/kg.