توسعه عملکرد فتوولتائیک سلول خورشیدی رنگ‌دانه‌ای با به‌کارگیری فتوآند نانوکامپوزیتی دی‌اکسید تیتانیم: نانولوله کربنی

نوع مقاله : علمی و پژوهشی

نویسندگان

دانشگاه صنعتی شریف

چکیده

پوشش­های نانوکامپوزیتی دی­اکسید تیتانیم- نانولوله کربنی چنددیواره (TiO2-MWCNT) حاوی درصدهای گوناگون از نانولوله کربنی روی زیرلایه اکسید قلع دوپ­شده با فلوئور به روش سل­ژل غوطه­وری ایجاد شدند. سپس، سلول­های خورشیدی رنگ­دانه­ای با استفاده از آندهای تهیه­شده از این پوشش­ها، الکترولیت اکسایشی-کاهشی پایه ید و الکترود کمکی پلاتینه­شده ساخته شدند. نتایج نشان دادند که سلول خورشیدی ساخته­شده از فیلم نانوکامپوزیتی TiO2-3%wt.MWCNT دارای بیش­ترین بازدهی تبدیل (31%/5) و میزان افزایش بازدهی نسبت به حالتی که از لایه TiO2 خالص در ساخت آند استفاده شود، %69 ~ است. این ارتقا در بازدهی تبدیل به افزایش رسانایی الکتریکی آند، کاهش ترکیب مجدد حامل­های بار در آن و کاهش مقاومت انتقال بار در فصل مشترک دی­اکسید تیتانیم/ رنگ­دانه/ الکترولیت نسبت داده شد.

کلیدواژه‌ها


عنوان مقاله [English]

Improvement of the Photovoltaic Performance of Dye-Sensitized Solar Cell by Using TiO2:CNT Nanocomposite Photoanode

نویسندگان [English]

  • Shervin Daneshvar Asl
  • SK Sadrnezhaad
Sharif University of Technology
چکیده [English]

TiO2–MWCNT nanocomposite films containing various percentages of multi-wall carbon nanotubes were coated on fluorinated tin oxide (FTO) conductive glass substrates by sol–gel dip coating technique. Dye-sensitized solar cells were assembled by using anodes made of these nanocomposite films, iodide/triiodide redox couple electrolyte and platinum coated FTO cathodes. Cells having TiO2–3wt.%MWCNT nanocomposite anode showed maximum solar-to-electric energy conversion efficiency of 5.31%, which was 69% higher than conventional TiO2 solar cells. The enhancement of conversion efficiency was attributed to the increased electrical conductivity of the anode, decreased charge carrier recombination in the anode and decreased charge transport resistance at the TiO2/dye/electrolyte interface.

کلیدواژه‌ها [English]

  • Dye sensitized solar cell
  • Titanium dioxide
  • Carbon Nanotube
  • Sol-gel dipping
  • Conversion efficiency
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