عنوان مجله
|
Materials Science and Engineering B-Advanced Functional Solid-State Materials
|
چکیده
|
A Pb-free perovskite solar cell has been designed based on methylammonium (MA) tin-iodide (CH3NH3SnI3). The
effect of electron transporting layer (ETL) material on the performance of the solar cell has been studied through
substituting the ETL by TiO2 and C60 nanolayers. The energy level and charge carrier concentration profiles of
the solar cells have been obtained for better understanding the involved mechanisms. The TiO2-containing solar
cell showed the maximum power conversion efficiency (η) of ~25.5 % at room temperature, with open circuit
voltage, short circuit current density and filling factor of ~1.06 V, 33.0 mA/cm2 and 73.1 %, respectively.
Although the C60-containing perovskite solar cell presented a lower η with the value of ~20.8 %, it could present
a higher external quantum efficiency at NIR wavelength region, as compared to the TiO2-containing cell. These
results can excite further investigation about the role of ETL nanomaterials in the performance of Pb-free
perovskite solar cells.
|