استفاده از پوست سبز گردو به عنوان رنگدانه جدید در سلول‌های خورشیدی حساس به رنگدانه، مبتنی بر نانوذارت TiO2

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی بیوسیستم- دانشکده کشاورزی- دانشگاه فردوسی مشهد.

2 گروه مهندسی بیوسیستم- دانشکده کشاورزی- دانشگاه فردوسی مشهد

3 گروه شیمی مواد غذایی- پژوهشکده صنایع غذایی

چکیده

در این تحقیق برای اولین بار رنگدانه پوست سبز گردو به عنوان حساس کننده طبیعی در سلول­های خورشیدی حساس به رنگدانه مبتنی بر نانوذرات TiO2 استفاده شد. رنگدانه‌ها با استفاده از دستگاه فراصوت استخراج و به روش صابونی سازی داغ پالایش شدند. از طیف سنجی­جذبی UV-Vis برای بررسی ویژگی­های جذبی رنگدانه و همچنین از طیف­سنجی مادون قرمز تبدیل فوریه (FTIR) برای شناسایی گروه­های عاملی در رنگدانه استفاده شد. منحنی I-V و بازده تبدیل فوتون به جریان (IPCE)، برای بررسی ویژگی‌های فتوولتائیکی رنگدانه تحلیل شد. نتایج نشان داد که سلول ساخته شده تحت شرایط استاندارد دارای چگالی جریان 939/0 mA/cm2، ولتاژ مدار باز  792/0 V، ضریب پرشدگی 71/0 و بازده کلی  528/0% می‌باشد، که در مقایسه با کارهای مشابه مقادیر قابل توجه و خوبی را نشان می­دهد.این بهبود بازده نتیجه استخراج و پالایش صحیح رنگدانه و همچنین ناشی از ساختار رنگدانه پوست سبز گردو است که انتقال بار به نانوذارت نیمه­رسانا را میسر می­کند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Application of green walnut shell as a novel pigment in DSSC based on TiO2 nanoparticles.

نویسندگان [English]

  • Kambiz Hossein Panahi 1
  • Mohammad Hossein Abbaspour-Fard 2
1 Dept. of Biosystems Engineering- Faculty of Agriculture - Ferdowsi University of Mashhad.
چکیده [English]

Natural dye extract of walnut shell, was extracted using an ultrasonic processor and purified by Hot saponification method, has been studied as a novel sensitizing dye to fabricate TiO2 nanoparticles based Dye Sensitized Solar Cells (DSSC). The extract was characterized using UV–Vis absorption spectroscopy and Fourier transform infrared (FTIR) employed to identify the anchoring groups in walnut shell pigment. The typical current-voltage and the incident photon to current efficiency (IPCE) curves were also provided and analysed for studying the photovoltaic properties. The Walnut shell extract exhibited a short circuit current density (Jsc) of 0.939 mA/cm2, open-circuit voltage (Voc) of 0.792 V, fill factor (FF) of 0.71 and conversion efficiency of 0.528% under standard test conditions. These are fairly good in comparison with the other similar cells. The improvement in efficiency is mainly due to the correct and good extraction and purification method and also due to the structure of walnut shell pigments that enhanced the charge transfer between the dye extract of Walnut shell and the TiO2 photo anode surface. However, such efficiency is still a lot needs to be improved to compete with the existing cells. This shows the need for extensive research in this area of research.

کلیدواژه‌ها [English]

  • solar cell
  • Pigment
  • walnut shell
  • Chlorophyll
  • TiO2 nanoparticles
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