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Title of article :
Dye-sensitized solar cells using graphene-based carbon nano composite as counter electrode
Author/Authors :
Choi، نويسنده , , Hyonkwang and Kim، نويسنده , , Hyunkook and Hwang، نويسنده , , Sookhyun and Choi، نويسنده , , Wonbong and Jeon، نويسنده , , Minhyon، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
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Abstract :
We demonstrated a counter electrode in dye-sensitized solar cells (DSSCs) using the graphene-based multi-walled carbon nanotubes (GMWNTs) structure. Graphene layers were prepared by drop casting on a SiO2/Si substrate and multi-walled carbon nanotubes (MWNTs) were synthesized on graphene layers using iron catalyst by chemical vapor deposition. The structural properties of GMWNTs were investigated by transmission electron microscope and field-emission scanning electron microscopy. The GMWNTs sheets were lifted off from the Si substrate by buffered oxide etching and were transplanted on fluorine-doped tin oxide glass by Van der Waals force as a counter electrode. From the electrochemical impedance spectroscopy and energy conversion efficiencies, electrochemical properties of GMWNTs were comparable with those of MWNTs counter electrode. The results suggested that GMWNTs were one of the candidates for a counter electrode for dye-sensitized solar cells.
Keywords :
Counter electrode , Graphene-based carbon nano tube , Dye-sensitized solar cells
Journal title :
Solar Energy Materials and Solar Cells
Journal title :
Solar Energy Materials and Solar Cells
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