| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Functional and Structural Thin Films and Coatings
|
| Presentation Title |
Spin Coating of Doped-silica on Czochralski-Silicon for Enhanced Radiative Properties |
| Author(s) |
Sufian Abedrabbo, EL Mostafa Benchafia, Anthony T. Fiory, Nuggehalli M. Ravindra |
| On-Site Speaker (Planned) |
Sufian Abedrabbo |
| Abstract Scope |
Silica sol-gel based on tetraethyl orthosilicate and various dopants is deposited on ordinary Czochralski silicon. The films are processed to engineer random strain fields that modulate the Si bandgap yielding enhanced radiative properties. In this talk, a comparative study of erbium doped silica by two different processing techniques is presented. The role of erbium is to increase the interfacial stress fields and will not directly affect the radiative recombination by upconversion. Other types of samples are synthesized using optically inactive trivalent dopants. The photoluminescence spectra of the processed samples are compared. SEM and TEM images of the interfaces are presented and estimates on the effects of strain fields on the bandgap are investigated by studying the X-ray diffraction spectra. Correlations of the nature of the stresses and their effects on the radiative recombination of free-carriers in Si will be discussed. |
| Proceedings Inclusion? |
Planned: |