دورية
Correlation of Structural and Optical Properties of Sputtered FeSi2Thin Films
| العنوان: | Correlation of Structural and Optical Properties of Sputtered FeSi2Thin Films |
|---|---|
| المؤلفون: | Milosavljević, Momir, Wong, Lewis, Louren\{c}o, Manon, Valizadeh, Reza, Colligon, John, Shao, Guosheng, Homewood, Kevin |
| المصدر: | Japanese Journal of Applied Physics; August 2010, Vol. 49 Issue: 8 p081401-081404, 4p |
| مستخلص: | Iron-disilicide films were sputter deposited on Si(100) wafers to 300--400 nm, at substrate temperatures ranging from room temperature to 700 \mbox{\circC}. As-deposited films were amorphous at deposition temperatures up to 200 \mbox{\circC}, and crystalline $\beta$-FeSi2at 300--700 \mbox{\circC}. Amorphous films were heat-treated after deposition at 300--700 \mbox{\circC}. They remained amorphous up to 400 \mbox{\circC}, and transformed to crystalline $\beta$-FeSi2at 500--700 \mbox{\circC}. Optical absorption measurements showed that the band gap of all films is direct in nature, ranging from 0.88 to 0.93 eV. The deposition temperature was seen to affect the crystallinity of the as-deposited films and to vary their optical properties significantly. The photoabsorption coefficient, measured at 1 eV, increased from $5.6 \times 10^{4}$ cm-1for amorphous films to $1.2 \times 10^{5}$ cm-1for the samples deposited at 700 \mbox{\circC}. The films crystallized by heat-treatment had a markedly different and irregular structure, resulting in their lower optical absorption. |
| قاعدة البيانات: | Supplemental Index |
| تدمد: | 00214922 13474065 |
|---|---|
| DOI: | 10.1143/JJAP.49.081401 |