Low Temperature Photoluminescence of 6H fluorescent SiC

Conference contribution


Publication Details

Author(s): Wei Y, Künecke U, Jokubavicius V, Syväjärvi M, Wellmann P, Ou H
Publication year: 2017
Language: English


Abstract

We have presented the low temperature photoluminescence (PL) measurements of three 6H fluorescent Silicon Carbide (f-SiC) samples. The epilayers of the f-SiC samples were nitrogenboron co-doped and grown by fast sublimation growth process (FSGP) method on the bulk 6H SiC substrates. The doping concentrations of the f-SiC epilayers were determined by secondary ion mass spectroscopy (SIMS) showing strong n-type, strong p-type and slight p-type extrinsic  semiconductor doping of each epilayer. The PL intensity of one commercial 6H bulk SiC (TanKeBlue Ltd.) was also measured and applied as the reference. The PL was excited by a diode laser source with wavelength of 405 nm and power of 5 mW. The temperature of the PL measurement was ranged from 25K to 300K when the liquid nitrogen cryostat was used, while lower temperature from 5K was achieved when the cryostat with liquid helium was applied. The
anomalous temperature dependences of the PL intensity spectrum of f-SiC samples were found. The PL peak energy’s S-shape dependence on the temperature was observed which was caused by nitrogen induced localization effect. For strong p-type f-SiC, one more PL intensity peak at 5 k was observed at wavelength of 520 nm, where this extra PL peak was the result of basal plane dislocation and free-to-acceptor recombination.


FAU Authors / FAU Editors

Künecke, Ulrike Dr.-Ing.
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)
Wellmann, Peter Prof. Dr.-Ing.
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)


External institutions with authors

Linköping University
Technical University of Denmark / Danmarks Tekniske Universitet (DTU)


How to cite

APA:
Wei, Y., Künecke, U., Jokubavicius, V., Syväjärvi, M., Wellmann, P., & Ou, H. (2017). Low Temperature Photoluminescence of 6H fluorescent SiC. In Proceedings of the E-MRS Spring Meeting 2017. Strasbourg, FR.

MLA:
Wei, Yi, et al. "Low Temperature Photoluminescence of 6H fluorescent SiC." Proceedings of the E-MRS Spring Meeting 2017, Strasbourg 2017.

BibTeX: 

Last updated on 2019-16-04 at 03:23