ویژگی‌های میکروساختاری و اپتیکی لایه‌های نازک اکسید روی آلایش یافته با آهن ساخته شده به روش اسپری پایرولیزیز

نوع مقاله : مقاله پژوهشی کامل

نویسندگان

گروه فیزیک، دانشکده علوم پایه، دانشگاه یاسوج، یاسوج، ایران

چکیده

در این پژوهش، لایه‌های نازک اکسید روی آلایش یافته با آهن (Zn1-xFexO) با روش ساده‌ و شیمیایی اسپری پایرولیزیز روی زیرلایه شیشه در دمای زیرلایه °C300 ساخته شدند. تأثیر میزان آلایش آهن روی ویژگی‌های ساختاری، ریخت‌شناسی و اپتیکی لایه‌های نازک ساخته شده مورد مطالعه قرار گرفت. تحلیل پراش پرتو ایکس نشان داد که همه‌ی نمونه‌های ساخته شده، ساختار بلوری ورتسایت هگزاگونال بدون هیچ گونه فاز ناخالصی دارند. تصاویر میکروسکوپی نیروی اتمی نشان داد که با افزایش میزان آلایش آهن، ویژگی‌های سطحی تغییر می‌کنند و لایه های با سطح به هم پیوسته تر و میکروساختاری چگال تر به دست می آید. . نتایج طیف سنج مادون قرمز، حضور مدهای ارتعاشی مربوط به ZnO، گروه‌های عاملی، پیوندهای شیمیایی و حضور آهن در ساختار را نشان داد. مطالعات اپتیکی نشان داد که با افزایش غلظت آلایش آهن، لبه‌ی جذب اپتیکی به سمت طول موج‌های بلندتر جابجا می‌شود و انرژی گاف اپتیکی نیز کاهش می‌یابد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Microstructure and optical properties of Fe-doped ZnO thin films deposited by spray pyrolysis

نویسندگان [English]

  • Sharife Gholami
  • Abolghasem Avazpour
  • Ali Modabberasl
Department of Physics, Faculty of Science, Yasouj University, Yasouj, Iran
چکیده [English]

In the present study, Fe-doped ZnO (Zn1−xFexO) thin films were deposited by simple chemical spray pyrolysis technique on glass substrates at substrate temperature of 300 °C. The effect of Fe-doping concentration on the structural, morphological and optical properties of deposited films was studied. The X-ray diffraction (XRD) analyses indicates that all the obtained samples have a hexagonal wurtzite crystal structure without any secondary phases. The atomic force microscopy (AFM) images show that the morphology features changes with the increase of Fe-doping concentration and a denser microstructure and smoother surface obtained. The Fourier transform infrared (FTIR) spectra shows the presence of the stretching vibration mode of ZnO, functional groups, chemical bonding and iron in the doped ZnO thin films. Optical studies indicate that the absorption edge of deposited film shifted towards higher-wavelength direction and their optical band-gaps are decreased with the increase of Fe-doping concentration.

کلیدواژه‌ها [English]

  • Spray pyrolysis
  • ZnO thin films
  • Fe-doped
  • Structure properties
  • optical properties
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