Cathodoluminescence study of micro-crack-induced stress relief for AlN films on Si(111)
| Autor: | Boris Meyler, S. Khatsevich, Joseph Salzman, Gabby Sarusi, Yuval Golan, O. Moshe, Michael Shandalov, Daniel H. Rich |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
chemistry.chemical_classification
Thin layers Materials science Silicon Aluminium nitride Analytical chemistry chemistry.chemical_element Mineralogy Heterojunction Cathodoluminescence Condensed Matter Physics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science chemistry.chemical_compound chemistry Materials Chemistry Stress relaxation Electrical and Electronic Engineering Thin film Inorganic compound |
| Zdroj: | Journal of Electronic Materials. 35:L15-L19 |
| ISSN: | 1543-186X 0361-5235 |
| Popis: | Spatially, spectrally, and depth-resolved cathodoluminescence (CL) measurements were performed for high-quality thin AlN films grown on Si(111). Cl spectra exhibited a sharp peak at 5.960 eV, corresponding to the near-band-edge excitonic emission of AlN. Depth-resolved CL analysis showed that deep level oxygen and carbon impurities are localized primarily at the AlN/Si interface and AlN outer surface. Monochromatic CL imaging of the near-band-edge emission exhibits a spotty pattern, which corresponds to high concentrations of threading dislocations and thermally induced microcracks in the thin layers. We have examined relief of the thermal stress in close proximity to single microcracks and intersecting microcracks. Local CL spectra acquired with a focused e-beam show blue-shifts as large as ∼82 meV in the AlN near-band edge excitonic peaks, reflecting defect-induced reductions in the biaxial thermal stress, which has a maximum value of ∼47 kbar. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink