کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1494839 | 992922 | 2013 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Temperature dependence of energy band gap and spontaneous polarization of SbSI nanowires Temperature dependence of energy band gap and spontaneous polarization of SbSI nanowires](/preview/png/1494839.png)
For the first time temperature dependence of optical energy gap of antimony sulfoiodide (SbSI) nanowires has been determined. In ferroelectric phase (for 241 K < T < Tc = 292 K) the evaluated indirect forbidden optical energy gap has been fitted by EgfI(T) = [2.195(3) − 10.8(1) × 10−4T] eV. In paraelectric phase (Tc = 292 K < T < 344 K) the energy gap has been described by EgfI(T) = [2.152(4) − 9.3(1) × 10−4T] eV. It has been estimated that at the temperature of 240 K the spontaneous polarization of the SbSI nanowires has the maximum value of about 0.08 C/m2.
► First time temperature dependence of optical energy gap of SbSI nanowires has been determined.
► Mechanisms of optical absorption in SbSI have been discussed.
► Spontaneous polarization influences energy gap of SbSI nanowires near the Curie point.
► Temperature dependence of spontaneous polarization of SbSI nanowires has been evaluated.
► Optical properties of SbSI nanowires have been compared with data of bulk single crystals.
Journal: Optical Materials - Volume 35, Issue 6, April 2013, Pages 1200–1206