بررسی خواص ساختاری و لومینسانس نانو فسفر Ca1-xZrO3:xCe+3

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه فیزیک دانشگاه پیام نور،تهران، ایران

2 گروه فیزیک، دانشگاه پیام نور،تهران، ایران

3 گروه فیزیک دانشگاه پیام نور، تهران، ایران

چکیده

در این پژوهش، مطالعات ساختاری و خواص ترمولومینسانس و فوتولومینسانس نانوذرات CaZrO3 جانشانی شده با Ce3+ در غلظت­های مختلف
(mol% 0/6-0/1=x) بررسی شد. مطالعه ساختاری نمونه ­ها با طیف­سنج پراش پرتو ایکس (XRD) و میکروسکوپ الکترونی روبشی -گسیل میدانی (FE-SEM) انجام شد. الگوی XRD دلالت بر تشکیل ساختار پروسکایت در دمای °C700 داشت. خواص ترمولومینسانس نانوفسفرهای +CaZrO3:xCe3 در دمای اتاق تحت پرتودهی پرتو ایکس در زمان­های مختلف بررسی شد. بیشینه شدت ترمولومینسانس برای نمونه CaZrO3:xCe+3 با ناخالصی mol%0/2=x به دست آمد. نمونه Ca0.998Ce0.002ZrO3 در بازه­های زمانی 1 تا min 15 تحت پرتودهی پرتو ایکس قرار گرفت. با افزایش زمان پرتودهی، تعداد حامل­ های بار افزایش می­ یابد که افزایش شدت ترمولومینسانس را نتیجه می­دهد. خطی بودن، تکرارپذیری و محوشدگی نیز برای این نمونه بررسی شد که با توجه به پایداری قابل توجه، محوشدگی پایین و خطی بودن پاسخ ترمولومینسانس، می­تواند گزینه مناسبی برای دزیمتری باشد. مطالعه رفتار فوتولومینسانس در دمای اتاق نشان داد هنگامی که نانوفسفرها با نور با طول موج  nm 253 برانگیخته می­شوند، به ترتیب سه قله انتشار در 404، 425 و nm 488 مشاهده می ­شود. با افزایش غلظت یون Ce3+، قله ­های انتشار در طیف فوتولومینسانس از ناحیه بنفش به آبی جابه­ جا می ­شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation of structural and luminescent properties of Ca1-xZrO3:xCe3+ nanophosphors

نویسندگان [English]

  • Ehsan Masumi Goodarzi 1
  • Marjaneh Jafari Fesharaki 2
  • Mohammad Reza Jalali 2
  • Saeed Mohammadi 3
1 Department of Physics, Payame Noor University, Tehran, Iran
2 Department of Physics, Payame Noor University, Tehran, Iran
3 Department of Physics, Payame Noor University, Tehran,
چکیده [English]

In this study, structural studies, photoluminescence and thermoluminssence properties of CaZrO3 nanoparticles added with Ce3+ ion at different concentrations (x = 0.1-0.6 mol%) were investigated. Structural analysis of the samples was performed by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The XRD pattern indicated the formation of a perovskite structure at 700 °C. The thermoluminssence (TL) properties of CaZrO3:xCe3+ nanophosphors were investigated at room temperature under X-ray at different times. Maximum TL intensity was obtained for Ca0.998Ce0.002ZrO3 samples. The sample of Ca0.998Ce0.002ZrO3 was exposed to X-ray at different time intervals from one to 15 minutes. As the irradiation time increases, the number of charge carrier increases, which results in an increase in the intensity of TL. Linearity, reproducibility and fading were also investigated for this sample, which is suitable for TL dosimetry due to its significant stability, low fading and linearity of the TL response. Study of photoluminescence (PL) behavior at room temperature showed when the phosphors were excited by light with a wavelength of 253 nm, three emission peaks at 404, 425 and 488 nm were obtained, respectively. By increasing Ce concentration, the emission peaks in PL spectra slightly shift from violet region to blue region.

کلیدواژه‌ها [English]

  • structural properties
  • luminescent
  • nanophosphors
  • Ca1-xZrO3:xCe3+
  • X-ray

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نانومقیاس
دوره 10، شماره 2
مرداد 1402
صفحه 1-9

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سابقه مقاله

  • تاریخ دریافت: 09 دی 1401
  • تاریخ بازنگری: 05 اسفند 1401
  • تاریخ پذیرش: 24 فروردین 1402

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