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Impact of electrochemical process on the degradation mechanisms of AlGaN/GaN HEMTs
(Massachusetts Institute of Technology, 2014)
AlGaN/GaN high electron mobility transistors (HEMTs) constitute a new generation of transistors with excellent electrical characteristics and great potential to replace silicon technology in the future, especially in high ...
Materials and device design for MEMS piezoelectric mechanical vibration energy harvesters
(Massachusetts Institute of Technology, 2012)
Piezoelectric vibration energy harvesters (PVEHs) for microelectromechanical systems (MEMS) have received considerable attention as an enabling technology for self-powered wireless sensor networks. MEMS-PVEHs are particularly ...
Self-seeded II-V semiconductor nanowire growth by metal-organic chemical vapor deposition (MOCVD)
(Massachusetts Institute of Technology, 2016)
III-V semiconductor epitaxial nanowires have gained significant attention in recent years, as they showcase an opportunity to combine III-V material properties with a non-planar morphology. To date, semiconductor devices ...
Understanding electronic and optical properties of PbS QDs for improved photovoltaic performance
(Massachusetts Institute of Technology, 2015)
Photovoltaic (PV) solar cells that constitute semiconducting sunlight absorber and metallic electrical contacts convert solar energy to electricity. Even though silicon represents roughly 90% of installed solar PV capacity ...
Biological and bio-inspired morphometry as a route to tunable and enhanced materials design
(Massachusetts Institute of Technology, 2016)
Structural materials in nature integrate classical materials selection rules with morphometry (geometry or shape-based rules) to create high-performance, multi-functional structures that exhibit tunable properties through ...
Geometrical control of domain walls and the study of domain wall properties of materials with perpendicular magnetic anisotropy
(Massachusetts Institute of Technology, 2017)
Magnetic based devices such as hard disk drives (HDDs) are widely used in the computer industry because of their high memory capacity, non-volatility and low cost compared to semiconductor-based solid state disk drives ...
Thermodynamics and kinetics of Mg intercalation for multivalent cathode applications
(Massachusetts Institute of Technology, 2017)
Energy storage, especially through electrochemical mechanisms such as batteries, is crucial for sustaining the ever-increasing energy needs of the future in a fossil-free manner. While the current industrial workhorse, ...
Ab initio investigations of solid electrolytes for lithium- and Sodium-ion batteries
(Massachusetts Institute of Technology, 2017)
Solid-state electrolytes have the potential to dramatically improve the safety and longevity of state-of-the-art battery technology by replacing the flammable organic electrolytes currently employed in Li-ion batteries. ...
Capillary-driven shape evolution in solid-state micro- and nano-scale systems
(Massachusetts Institute of Technology, 2015)
Thin films are the fundamental building blocks of many micro- and nano-scale devices. However, their high surface-area-to-volume ratio makes them unstable due to excess surface free energy. Capillarity drives a process ...
Understanding and designing carbon-based thermoelectric materials with atomic-scale simulations
(Massachusetts Institute of Technology, 2015)
Thermoelectric (TE) materials, which can convert unused waste heat into useful electricity or vice versa, could play an important role in solving the current global energy challenge of providing sustainable and clean energy. ...