October 5, 2022
Highly Multicolored Light-Emitting Arrays for Spectroscopic Applications
Unconventional device architectures may open up unexpected opportunities for optoelectronic devices and sensors. The range of luminescent materials that can be easily integrated into electroluminescent devices is typically limited due to material processing and band alignment issues, hindering the development of electroluminescent devices at extreme wavelengths and the use of electroluminescence spectroscopy as an analytical technique. In this talk, I will discuss the development of a pulsed light-emitting capacitor device that can generate electroluminescence from materials that emit in the infrared to ultraviolet regime, independent of the form factor of the material. Because the active materials lie atop the device with no further processing steps required, the device can be used as a platform to study the dynamics of electroluminescence in materials under chemical and environmental perturbations. Furthermore, large multiplexed arrays of highly multicolored light-emitting devices can be fabricated on a single chip due to the simple fabrication process. Using such arrays as an active light source, various compact spectral measurements can be performed with the aid of compressive reconstruction algorithms, including spectral imaging of thin film samples.
Vivian is a Ph.D. student in Electrical Engineering and Computer Sciences at UC Berkeley, where she works on optoelectronic devices in the research group of Professor Ali Javey. Previously, she received a B.S. in Electrical Engineering from Stanford University in 2017 and an M.Phil. in Physics from the University of Cambridge in 2018, where she worked on nanopore sensors for biomolecule detection in the research group of Professor Ulrich Keyser.