Electroluminescence of germanium LEDs on silicon: Influence of antimony doping

Schwartz B, Klossek A, Kittler M, Oehme M, Kasper E, Schulze J (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Physica Status Solidi (C) Current Topics in Solid State Physics Wiley - V C H Verlag GmbbH & Co.

Book Volume: 11

Pages Range: 1686-1691

Journal Issue: 11-12

DOI: 10.1002/pssc.201400056

Abstract

Antimony-doped Ge-LEDs were subjected to electroluminescence studies at temperatures about 300 K and 80 K. The LEDs were grown on Si substrates by MBE. The thickness of the active layer was 300 nm. For the p+nn+-LEDs the Sb concentrations were 1 × 1018, 1 × 1019, 3 × 1019, 4 × 1019, 7 × 1019 or 1 × 1020 cm-3, respectively. As reference a p+in+-LED without intentional doping in the active layer was used. The investigated specimen exhibited dominance of the direct transition line at about 0.8 eV. Moreover, luminescence indirect transition was observed. In general, the spectra reveal higher EL intensities at room temperature as compared to 80 K. With decreasing temperature the direct peak was blue shifted. The highest EL intensity was found for the LED with Sb concentration of 3 × 1019 cm-3. With increasing Sb doping a red-shift of the direct peak was observed, caused by band gap narrowing. In addition, a simulated curve of the direct transition was compared with our samples and fits well with the measured spectra.

Authors with CRIS profile

Jörg Schulze

Involved external institutions

Brandenburgische Technische Universität Cottbus-Senftenberg (BTU) DE Germany (DE) Universität Stuttgart DE Germany (DE)

How to cite

APA:

Schwartz, B., Klossek, A., Kittler, M., Oehme, M., Kasper, E., & Schulze, J. (2014). Electroluminescence of germanium LEDs on silicon: Influence of antimony doping. Physica Status Solidi (C) Current Topics in Solid State Physics, 11(11-12), 1686-1691. https://doi.org/10.1002/pssc.201400056

MLA:

Schwartz, Bernhard, et al. "Electroluminescence of germanium LEDs on silicon: Influence of antimony doping." Physica Status Solidi (C) Current Topics in Solid State Physics 11.11-12 (2014): 1686-1691.

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