کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1675084 1008973 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of deposition time and temperature on the optical properties of air-annealed chemical bath deposited CdS films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Effects of deposition time and temperature on the optical properties of air-annealed chemical bath deposited CdS films
چکیده انگلیسی

CdS films of over 1-μm thickness were deposited onto glass substrates by chemical bath deposition (CBD). Deposition temperature and time were varied from 40 °C to 60 °C and from 30 min to 4 h, respectively. The highest deposition rate, 6.39 nm/min, was obtained with samples deposited for 90 min at 60 °C. The films deposited at 60 °C for 4 h were found to have the best adhesion and without defects. The optical properties, in particular the optical band gap, depended on film thickness, the deposition and annealing temperatures. Annealing in air resulted in a shift of the absorption edge towards higher wavelengths, i.e., a decrease in the gap value from 2.45 eV to 2.38 eV. The optical band edges of the films were not constant but depended on the annealing temperature. The refractive index, calculated by applying the envelope method on the transmission of the films in wavelengths from 550 nm to 850 nm, was in the range 1.95–2.26. The resistivity determined from dark conductivity measurement, as a function of the annealing temperature, was found to be in the order of 105 Ω cm for samples annealed in air at 250 °C, 3 h, and the activation energy was about 0.22 eV.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 515, Issue 4, 5 December 2006, Pages 1688–1693
نویسندگان
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