بررسی اثر پایدارسازهای آمینوالکلی بر ساختار بلوری، گاف نواری و درخشندگی آبی نانوذرات اکسید روی آلاییده با مس تهیه شده به روش سل-ژل

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه فیزیک، دانشکده علوم پایه، دانشگاه گیلان، رشت، ایران

چکیده

در این پژوهش، نانوذرات اکسید روی آلاییده با مس به روش سل-ژل و با استفاده از پایدارسازهای مختلف مونو، دی و تری- اتانول آمین تهیه شدند. اثر پایدارسازهای مختلف بر ویژگی­های ساختاری، ریخت شناسی و اپتیکی نانوذرات بررسی شد. بررسی الگوی پراش پرتو X ساختار ششگوشی ورتسایت را برای نمونه‌ها نشان می‏دهد. اندازه بلورک، کرنش، تنش و انرژی تغییر شکل شبکه توسط روابط ویلیامسون- هال اصلاح‌شده تعیین شدند. نتایج نشان می­دهند که نمونه­ی تهیه‌شده با مونواتانول آمین کمترین اندازه بلورک، پارامتر شبکه و کرنش را دارد. تصاویر میکروسکوپ الکترونی روبشی گسیل میدانی (FESEM) کاهش انباشتگی نانوذرات با افزایش گروه آمین را نشان می‏دهد. با افزایش گروه آمین در سل اولیه، جابجایی قرمز در لبه نواری و کاهش شدت درخشندگی آبی نانوذرات دیده شد که با کاهش گاف نواری از 16/3 به 11/3 الکترون‌ولت محاسبه شده از طیف بازتاب پخشی و افزایش تنش در شبکه نمونه‏ها همخوانی دارد.    

کلیدواژه‌ها

عنوان مقاله [English]

Investigation of the effect of amino-alcohol stabilizers on crystal structure, band gap and blue luminescence of Cu-doped ZnO nanoparticles prepared by sol-gel method

نویسندگان [English]

  • Parvan
  • Mazloom
  • Esmaeili Ghodsi
  • Safari
Department of Physics, Faculty of Sciences, University of Guilan, Rasht, Iran
چکیده [English]

In this research, Zn0.97Cu0.03O nanoparticles are prepared by sol-gel method using various stabilizers (Mono, Di, and Tri-ethanolamine). The effect of stabilizers on the structural, morphological and optical properties of the nanoparticles were investigated. Study of X-ray diffraction pattern shows the hexagonal wurtzite structure of samples. The crystallite size, strain, stress, and deformation energy of the lattice were determined by modified Williamson-Hall relations. The results showed the sample prepared with monoethanolamine has the lowest crystallite size, lattice parameter and strain. FESEM images revealed a decrease in nanoparticle accumulation with increasing amine group. By the change of mono to tri-ethanolamine in the primary sol, the red shift was observed at the near band edge emission of Pl spectra which consistent with decrease of optical band gap from 3.16 eV to 3.11 eV deduced from strain enhancement.

کلیدواژه‌ها [English]

  • Cu-doped ZnO
  • Nanoparticles
  • Sol-gel
  • Stabilizer
  • structural parameters
  • Band gap
  • photoluminescence

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مجله بلورشناسی و کانی شناسی ایران
دوره 29، شماره 1 - شماره پیاپی 81
فروردین 1400
صفحه 257-266

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سابقه مقاله

  • تاریخ دریافت: 19 فروردین 1399
  • تاریخ بازنگری: 02 تیر 1399
  • تاریخ پذیرش: 27 مرداد 1399

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