کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1605480 1516210 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optical properties of amorphous and crystalline tris(8-hydroxyquinoline) indium films
ترجمه فارسی عنوان
خواص اپتیکی فیلم های ایندیوم تریس (8 هیدروکسی کینولین) آمورف و کریستالی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی


• As-deposited amorphous Inq3 films transform to crystalline upon annealing.
• The influence of annealing on optical properties of Inq3 films is investigated.
• XRD and SEM is used to identify the structural properties.
• Single oscillator and Drude models are used to analyze the refractive index.
• The absorption edge is analyzed for determining the optical band gap.

Tris(8-hydroxyquinoline) indium (Inq3) films were physically deposited via thermal evaporation technique and were subsequently thermally annealed at different temperatures in air atmosphere. The effect of annealing on the structural and optical properties of the films was investigated. X-ray diffraction showed that the as-deposited and annealed films at 100 and 200 °C have amorphous structure, whereas the annealed films at 270 and 300 °C have crystalline structure in which a preferred orientation of growth is obtained. The evolution of the optical properties of the films due to annealing has been correlated with their structural properties. The optical properties were studied in terms of spectrophotometeric measurements of the transmittance and reflectance over the spectral range 200–2500 nm, from which the refractive and absorption indices were calculated using Murmann’s exact equations. The single oscillator and Drude models were applied for determining the dispersion parameters of the films. Analysis of the absorption coefficient revealed that the films have direct allowed optical band gap of 2.77 eV, which is increased to 2.85 eV as a result of annealing. The thermal properties were studied by means of differential scanning calorimetry and thermogravimetric measurements.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 683, 25 October 2016, Pages 393–398
نویسندگان
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