ساخت و مشخصه‌یابی نانوذرات La2(WO4)3 آلاییده با عناصر خاکی نادر و کاربرد آن‌ها در سلول‌های خورشیدی رنگدانه‌ای به عنوان ماده مبدل بسامد های پایین

نوع مقاله : مقاله پژوهشی

نویسندگان

1 پژوهشکده علوم و فناوری نانو، دانشگاه کاشان، کاشان، ایران

2 دانشکده فیزیک، دانشگاه دامغان، دامغان، ایران

3 دانشکده فیزیک، دانشگاه کاشان، کاشان، ایران

چکیده

در این پژوهش، نانوذرات خالص La2(WO4)3 و آلاییده با یون­های Dy3+ و Gd3+، به عنوان آلاینده­های جدید، به روش گرمابی با موفقیت ساخته شدند و اثر دمای بازپخت، نوع آلاینده و غلظت آن بر ویژگی­های ساختاری و نوری آن­ها بررسی شد. آنها برای نخستین بار به عنوان ماده مبدل بسامدهای پایین در سلول خورشیدی رنگدانه­ای استفاده شدند. نمونه­ها با پراش­سنج پرتو X، میکروسکوپ الکترونی روبشی اثر میدانی مجهز به سنجش­گر پراکندگی انرژی پرتو X، میکروسکوپ الکترونی عبوری، طیف سنج فرابنفش-مرئی  و طیف سنجی نورتابی مشخصه­یابی شدند. نتایج پراش پرتو X نشان داد که نانوذرات بس­بلور بوده و دارای ساختار تک میل هستند. بررسی­های نوری نشان داد که این نانوذرات می­توانند نور فرابنفش را جذب و نور مرئی را در گستره­ی طول موج­های nm 360 تا nm 500 گسیل کنند. حضور یک لایه نازک از نانوذرات La2(WO4)3: Dy بر سلول خورشیدی رنگدانه­ای موجب افزایش 6/10 درصدی بازده گردید.

کلیدواژه‌ها

عنوان مقاله [English]

Synthesis and characterization of La2(WO4)3 nanoparticles doped with rare earth element and its application as down conversion material in dye sensitized solar cells

نویسندگان [English]

  • Nafiseh Shirvani 1
  • Zohreh Chamanzadeh 2
  • Mostafa Zahedifar 3
1 Institue of Nano Science and Nano Technology, University of Kashan, Kashan
2 School of Physics, Damghan University, Damghan
3 Department of Physics, University of Kashan, Kashan
چکیده [English]

In this research, pure and doped with Dy3+ and Gd3+ ions, as impurity of La2(WO4)3 nanoparticles, were successfully synthesis using hydrothermal method and the effect of annealing temperature, type and concentration of dopant on their structural and optical properties were investigated and used as down converter material in dye sensitized solar cell. The samples were characterized by X-ray diffraction, field emission scanning electron microscopy (equipped with spectra energy dispersive analysis of X-ray), transmission electron microscopy, ultraviolet-visible spectrometer and photoluminescence spectrometer. The X-ray diffraction results showed that the nanoparticles are polycrystal with monoclinic structure. Optical studies show that these nanoparticles can absorb ultraviolet light and emit visible light in the wavelength ranging from 360 nm to 500 nm. The presence of a thin layer of La2(WO4)3:Dy nanoparticles on the dye sensitized solar cell increased the efficiency by 10.6%.

کلیدواژه‌ها [English]

  • Nanoparticles
  • lanthanum tungstate
  • hydrothermal method
  • optical characteristics
  • Low frequency converter
  • pigment solar cell

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  • تاریخ دریافت: 02 بهمن 1402
  • تاریخ بازنگری: 22 اسفند 1402
  • تاریخ پذیرش: 25 فروردین 1403

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