Apr 25, 2024
3:30pm - 3:45pm
Room 347, Level 3, Summit
Sufian Abedrabbo1,Anthony Fiory2,Nuggehalli Ravindra3
Khalifa University1,Integron Solutions LLC2,New Jersey Institute of Technology3
Sufian Abedrabbo1,Anthony Fiory2,Nuggehalli Ravindra3
Khalifa University1,Integron Solutions LLC2,New Jersey Institute of Technology3
Colloidal silica bulk glass and coatings have been studied extensively for many years. In this work we report a new optoelectronic phenomenon introduced by interfacing Er-doped sol-gel silica on Czochralski silicon (Cz-Si). The discovery is noteworthy on two aspects: (i) strong enhancement of bandgap emission, and (ii) modeling the observed luminescence spectra reveals strong dominance of correlated electron-hole (e-h) radiative recombination. Colloidal interfacial reactions with Cz-Si surface are known to introduce random interfacial strain fields that favors the radiative recombination interactions. The modeling of the room-temperature photoluminescence spectra exhibit attenuates a strong attenuation of the shorter tail of the emission spectra; thus, amplifying the excitonic e-h. The presentation will also include a comparative study of the bandgap emission of thermally oxidized Cz-Si with the colloidal prepared spin-coated silica on Cz-Si to highlight the discovery.