Journal article
Impacts of carrier capture processes in the thermal quenching of photoluminescence in Al–N co-doped SiC
Diode Lasers and LED Systems, Department of Photonics Engineering, Technical University of Denmark1
Department of Photonics Engineering, Technical University of Denmark2
Department of Energy Conversion and Storage, Technical University of Denmark3
Linköping University4
Friedrich-Alexander University Erlangen-Nürnberg5
High concentrations of aluminum (Al) and nitrogen (N) dopants of 6H SiC have been achieved by a fast sublimation growth process. The Al–N co-doped 6H-SiC layer exhibits a strong light-blue photoluminescence emission at low temperatures due to emissions from DI centers and donor acceptor pairs (DAP).
The photoluminescence quenching mechanisms of those emissions are different. The decrease of free carrier capture cross-section as temperature increases according to the cascade capture process causes quenching of the photoluminescence emission form DI centers. Emission from Al–N DAP centers exhibits an exponential quenching with activation energy of (95 ± 10) meV.
This is attributed to a competing hole capture by non-radiative defect in a multiphonon emission process.
| Language: | English |
|---|---|
| Publisher: | Springer Berlin Heidelberg |
| Year: | 2019 |
| Pages: | 1-5 |
| Journal subtitle: | Lasers and Optics |
| ISSN: | 14320649 and 09462171 |
| Types: | Journal article |
| DOI: | 10.1007/s00340-019-7279-8 |
| ORCIDs: | 0000-0002-2597-7032 , Norrman, K. and Ou, H. |
