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Ground state determination, ground state preserving fit for cluster expansion and their integration for robust CE construction
(Massachusetts Institute of Technology, 2018)
In this thesis, we propose strategies to solve the general ground state problem for arbitrary effective cluster interactions and construct ground state preserving cluster expansions. A full mathematical definition of our ...
Manipulating fluids and fields In multimaterial fibers
(Massachusetts Institute of Technology, 2020)
From conduits for fluid transport to the threads in highly absorbant textiles, high aspect ratio fibers and tubings have been used for thousands of years to manipulate fluids. The emergence of multimaterial thermal drawing ...
Lithium deposition and stripping in solid-state battery via coble creep
(Massachusetts Institute of Technology, 2020)
Solid-state Li metal batteries require accommodation of electrochemically generated mechanical pressure inside Li metal. In this thesis it shows, through in situ transmission electron microscopy experiment of Li and Na ...
Germanium-on-silicon virtual substrate for lateral multijunction photovoltaics
(Massachusetts Institute of Technology, 2020)
Lateral multijunction photovoltaics based on III-V direct band gap semiconductors enable efficient energy conversion. However, lattice matching between cell and substrate requires the use of expensive Ge or III-V substrates, ...
Defect and electrical properties of high-K̳ dielectric Gd₂O₃ for magneto-ionic and memristive memory devices
(Massachusetts Institute of Technology, 2020)
While high-[subscript K] dielectrics utilized in CMOS technology are noted for their highly insulating characteristics, they have demonstrated surprising electrolytic behavior as key components in a variety of thin film ...
Grain-growth mechanisms in rapidly solidified matrix steels
(Massachusetts Institute of Technology, 1984)
Understanding the active sites of Mg-Al oxide catalysts in the formation of aromatic platform chemicals from acetaldehyde
(Massachusetts Institute of Technology, 2018)
The aromatization of acetaldehyde derived from bio-based feedstocks offers a sustainable route to obtaining valuable BTX (benzene, toluene, and xylenes)-like platform chemicals traditionally produced from petroleum naphtha. ...
Annealing for intrinsic point-defect control and enhanced solar cell performance : the case of H₂S and tin sulfide (SnS)
(Massachusetts Institute of Technology, 2015)
This thesis explores the possibility of tin monosulfide (SnS) as a new and promising solar cell absorber material. Out of many other Earth-abundant binary semiconductors, it was selected for study because it has a strong ...
Applications of emerging optoelectronic materials : lead sulphide quantum dots and steam cracker tar
(Massachusetts Institute of Technology, 2019)
Optoelectronics covers a wide and varied field of devices and applications, with many requiring different material properties for operation and manufacturing. In this thesis, I describe work performed over the course of ...
Micro optics for micro hybrid concentrator photovoltaics
(Massachusetts Institute of Technology, 2019)
Concentrating photovoltaics (CPV) systems use concentrating optical elements to significantly reduce the material and processing costs of multi-junction high efficiency solar cells and improve the conversion efficiency. ...