High quality Al0.37In0.63N layers grown at low temperature (<300 °C) by radio-frequency sputtering
High-quality Al0.37In0.63N layers have been grown by reactive radio-frequency (RF) sputtering on sapphire, glass and Si (111) at low substrate temperature (from room temperature to 300 degrees C). Their structural, chemical and optical properties are investigated as a function of the growth temperat...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad de Alcalá (UAH) |
| Repositorio: | e_Buah Biblioteca Digital Universidad de Alcalá |
| Idioma: | inglés |
| OAI Identifier: | oai:ebuah.uah.es:10017/63264 |
| Acceso en línea: | http://hdl.handle.net/10017/63264 https://dx.doi.org/10.1016/j.mssp.2019.04.029 |
| Access Level: | acceso abierto |
| Palabra clave: | III-nitrides AlInN RF-sputtering Characterization Low growth temperature Electrónica Electronics |
| Sumario: | High-quality Al0.37In0.63N layers have been grown by reactive radio-frequency (RF) sputtering on sapphire, glass and Si (111) at low substrate temperature (from room temperature to 300 degrees C). Their structural, chemical and optical properties are investigated as a function of the growth temperature and type of substrate. X-ray diffraction measurements reveal that all samples have a wurtzite crystallographic structure oriented with the c-axis perpendicular to the substrate surface, without parasitic orientations. The layers preserve their Al content at 37% for the whole range of studied growth temperature. The samples grown at low temperatures (RT and 100 degrees C) are almost fully relaxed, showing a closely-packed columnar-like morphology with an RMS surface roughness below 3 nm. The optical band gap energy estimated for layers grown at RT and 100 degrees C on sapphire and glass substrates is of similar to 2.4 eV while it red shifts to similar to 2.03 eV at 300 degrees C. The feasibility of growing high crystalline quality AlInN at low growth temperature even on amorphous substrates open new application fields for this material like surface plasmon resonance sensors developed directly on optical fibers and other applications where temperature is a handicap and the material cannot be heated. |
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