Iron and nickel doped tin (IV) oxide nanosheets: Synthesis, characterization and applications in hybrid solar cells

Add time:08/06/2019    Source:sciencedirect.com

The pristine and (Fe and Ni)-doped TIN (IV) OXIDE (cas 18232-10-5) (SnO2) nanosheets were synthesized by hydrothermal method. These nanosheets were characterized in detail by UV- visible spectroscopy, fourier transform infra-red (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM revealed that the nanosheets varied in size from 14 nm to 40 nm. Electrical parameters such as resistance, resistivity and conductivity were also investigated by two probe resistivity measurements. Doped SnO2 nanosheets were found more conducting than pristine SnO2. The pristine and (Fe and Ni)-doped SnO2 nanosheets were used to fabricate photoactive blend for solid state dye-sensitized solar cells (DSSCs). The effects of pristine and (Fe and Ni)-doped SnO2 nanosheets on the efficiency of solar cells were investigated using photocurrent-voltage (J-V) measurements. Maximum power conversion efficiency of 0.48% was recorded for Ni-doped SnO2 nanosheets grafted with sulphonic acid functionalized dye. Other characteristic photovoltaic parameters were found as 2.54 mAcm−2, short circuit current density (Jsc), 0.42 mV, open circuit voltage (Voc) and 0.45, fill factor (FF). The band gap of SnO2 (3.8 eV) was significantly reduced to 3.2 eV and 2.8 eV for Fe and Ni-doped SnO2 respectively.

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