Sb and N Incorporation Interplay in GaAsSbN/GaAs Epilayers near Lattice-Matching Condition for 1.0–1.16-eV Photonic Applications
| Autor: | Teresa Ben, D.F. Reyes, V. Braza, JM José Maria Ulloa, A. Gonzalo, David González, A. D. Utrilla |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Diffraction
Materials science Photoluminescence Nanotechnology 81.05.Ea (III-V semiconductors) 02 engineering and technology Photodetection Nitride 7. Clean energy 01 natural sciences Molecular physics law.invention Structural and optical characterization law Dilute nitride semiconductor 0103 physical sciences Solar cell lcsh:TA401-492 General Materials Science Wafer 68.55.Nq composition and phase identification 010302 applied physics Nano Express 021001 nanoscience & nanotechnology Condensed Matter Physics 81.15.Hi (molecular beam epitaxy) Temperature gradient GaAsSbN lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology 71.20.Nr Semiconductor compounds Molecular beam epitaxy |
| Zdroj: | Nanoscale Research Letters Nanoscale Research Letters, Vol 12, Iss 1, Pp 1-10 (2017) |
| ISSN: | 1556-276X 1931-7573 |
| Popis: | As promising candidates for solar cell and photodetection applications in the range 1.0–1.16 eV, the growth of dilute nitride GaAsSbN alloys lattice matched to GaAs is studied. With this aim, we have taken advantage of the temperature gradient in the molecular beam epitaxy reactor to analyse the impact of temperature on the incorporation of Sb and N species according to the wafer radial composition gradients. The results from the combination of X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopies (EDS) show an opposite rate of incorporation between N and Sb as we move away from the centre of the wafer. A competitive behaviour between Sb and N in order to occupy the group-V position is observed that depends on the growth rate and the substrate temperature. The optical properties obtained by photoluminescence are discussed in the frame of the double-band anticrossing model. The growth conditions define two sets of different parameters for the energy level and the coupling interaction potential of N, which must be taken into account in the search for the optimum compositions 1–1.15-eV photonic applications. |
| Databáze: | OpenAIRE |
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