کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
5352012 1503565 2017 22 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Temperature dependence of nickel oxide effect on the optoelectronic properties of porous silicon
ترجمه فارسی عنوان
وابستگی دمای اکسید نیکل به خواص اپتوالکترون سیلیکون متخلخل
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موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
This paper investigates the effect of Nickel oxide (NiO) on the structural and optical properties of porous silicon (PS). Our investigations showed an obvious improvement of porous silicon optoelectronique properties after coating the PS with NiO thin film as a passivating process. The as-prepared NiO/PS thin film was subjected to a thermal annealing to study the effect of temperature on the efficiency of this treatment. The deposition of NiO onto the porous silicon layer was performed using the spray pyrolysis method. The surface modification of the as-prepared NiO/PS samples was investigated after annealing at various temperatures, using an infrared furnace, ranging between 300 °C and 600 °C. The X-ray Diffraction results showed that obtained films show cubic structure with preferred (200) plane orientation. We found an obvious dependence of the PS nanocrystallites size (nc-Si) to the annealing temperature. Photoluminescence (PL) is directly related to the electronic structure and transitions. The characteristic change of the band gap with decrease in size of the nanostructures can be pointed out by the observed blue shift in the photoluminescence spectra. Nickel oxide treatment of Porous silicon led to a significant increase of photoluminescence with a resulting blue-shift at higher annealing temperature. The surface morphology was examined by scanning electron microscope (SEM), and FTIR spectroscopy was used to study the chemical composition of the films. Moreover, the total reflectivity of NiO/PS samples decreases noticeably comparing to an untreated PS layer due to an enhanced light absorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 404, 15 May 2017, Pages 34-39
نویسندگان
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