Ali Javey (Advisor)

Wide band gap semiconductors are crucial for applications in power electronics, displays, solid-state lightning and many other fields. Due to their intrinsic structure and electronic properties, many wide band gap semiconductors can not be intentionally doped as desired, which limits their role in electronic and optoelectronic devices. In this project, we propose tuning the optoelectronic properties of wide band gap semiconductors electrically to enhance its luminescence efficiency.

Alternating current (AC) driven light emitting devices (LEDs) are recently dragging attention due to its efficient color tunability. These devices consist of multilayer structure as the direct current (DC) driven LEDs, but the multilayer structure has drawbacks such as the large amount of material usage that increases the fabrication cost, and the difficult yield control due to a number of processing steps. In contrast, a recently demonstrated AC driven LED with a single contact has several advantages compared to the previous structures such as simple device structure, diverse...

In the field of sweat monitoring, many sensors have been piloted with one or two subjects over limited periods of time, but there is a need for prolonged, large-scale studies to establish reliable physiological correlations that account for diverse subjects, activities, and environments. Chemical sensors provide the concentration of analytes of interest, including sodium, potassium, and glucose, while sweat rate sensors provide standalone information on nerve function and hydration. Monitoring both of these in parallel will enable the decoding of concentrations of analytes that are...