Detailed Structural and Morphological Characterization of InGaN Thin Films Grown by RF Magnetron Sputtering with Various Substrate Temperature

Indium Gallium Nitride (InGaN) thin film was grown on the GaN/p − Si substrate using an RF magnetronsputter under condition of different substrate temperatures. Various experimental measurements were takento comprehend effects of substrate temperature on the structure of thin film and results were analyzed.Grazing mode of XRD results confirmed that InGaN thin film has a hexagonal structure with (002) planefor 500°C and 600 °C substrate temperature. It was seen that structural parameters of thin film show achange with substrate temperature change. Reasons were discussed. Strain and stress values in InGaN thinfilm were calculated from experimental results and it was found that all thin film has compressive stress.Morphological parameters of thin film were measured by AFM and it was understood that these propertiesare varied by changing substrate temperature. Also, growth mode of some thin film was obtained to belayer-plus-island mode (Stranski-Krastanov growth mode), others was obtained to be layer by layer growthmode (Frank van der Merwe mode). SEM evaluation gives that increasing substrate temperature worsenedthe surface structure of InGaN thin film; it is compatible with and supports XRD results. Compositionalvalues in InGaN thin film were found from XPS analysis. In addition to our material, carbon and oxygenhave also been obtained from XPS results, as expected. Detailed morphological and structural properties ofInGaN thin films have been seen to change with changing substrate temperature and we believe this playsan important role in production of InGaN based optoelectronic devices.

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Celal Bayar Üniversitesi Fen Bilimleri Dergisi-Cover

ISSN: 1305-130X
Başlangıç: 2005
Yayıncı: Manisa Celal Bayar Üniversitesi Fen Bilimleri Enstitüsü

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