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Physics Seminar - Visible Light Emission from Silicon-Based Nanostructures-FR

Author: myUNB News

Posted on Dec 4, 2018

Category: News and Notices

At the next UNB Physics Department Seminar on Thursday, Dec. 6, from 1:15 - 2:15 p.m., in the IUC Physics/Admin Bldg, 204, Zahra Khatami, UNB, will present 'Visible Light Emission from Silicon-Based Nanostructures.'

“Computer chips are everywhere, cell phones, tablets have revolutionized our world. Silicon has long been established as the material of choice for these chips known as integrated circuits. We now have the opportunity to make photonic chips, which use photons instead of electrons (Photonics). In order to use silicon in photonic devices, focusing on two application areas, namely telecommunications and solar cells, it is necessary to have good control of the optical emission from silicon-based materials. This can be accomplished through careful design of the composition of multi-element structures.

After a brief review of the latest developments in the field, this talk will focus on the luminescence of novel silicon-based nanostructures including silicon carbonitride (SiCxNy) and rare earth (RE) doped silicon oxide (SiOx) thin films. It will cover fabrication and characterization techniques, particularly a unique, recently developed fabrication method to accurately control the doping level of RE ions (integrated ECR-PECVD and magnetron sputtering). In addition to multitude characterization techniques, from the microstructural perspective, thin films will be discussed using synchrotron radiation as well as positron annihilation spectroscopy. At the end, the application of such thin films in solar cell technology will be reviewed.”

Please join us for Colloquium tea in P203 beforehand.


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