Assessment of bonding characteristic of β-(AlxGa1−x)2O3 alloys from photoluminescence and x-ray absorption near edge spectroscopy
| العنوان: | Assessment of bonding characteristic of β-(AlxGa1−x)2O3 alloys from photoluminescence and x-ray absorption near edge spectroscopy |
|---|---|
| المؤلفون: | Jayanta Bhattacharjee, R. K. Gupta, S. D. Singh |
| المصدر: | Applied Physics Letters. 122:152104 |
| بيانات النشر: | AIP Publishing, 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Physics and Astronomy (miscellaneous) |
| الوصف: | Bonding characteristics of the β-(AlxGa1−x)2O3 alloy have been assessed from red luminescence and x-ray absorption near edge spectroscopy (XANES). Red luminescence, known as R1 and R2 lines, originates from crystal field split d-levels of unintentionally present Cr3+ ions in the β-(AlxGa1−x)2O3 alloy, is found to blueshift with Al composition. This indicates that the nephelauxetic effect in β-Ga2O3 materials decreases with Al substitution, which results to a decrease in the covalency of the β-(AlxGa1−x)2O3 alloy. The XANES experiments at the oxygen K-absorption edge provide clear evidence of the decrease in the covalency of the alloy, where an absorption peak representing the covalency in the β-Ga2O3 material is found to decrease with an increase in the Al composition. Furthermore, the nature of the observed red luminescence for the β-(AlxGa1−x)2O3 alloy is determined to be excitonic recombination. Our results further confirm the fact that the red luminescence from Cr3+ ions is an excellent local probe to assess the bonding characteristic of the host material. |
| تدمد: | 1077-3118 0003-6951 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::19affb5086758f5e4b8324e19e85565f https://doi.org/10.1063/5.0148800 |
| رقم الأكسشن: | edsair.doi...........19affb5086758f5e4b8324e19e85565f |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Scitation. | تدمد: | 10773118 00036951 |
|---|