Abstract:
photovoltaic applications. Highly efficient, low-cost quantum dot-sensitized solar cells
(QDSSCs) have been fabricated with CdS quantum dots by co-sensitization with MnS
quantum dots. The CdS and MnS quantum dots layer, which was deposited on the
photoanode using the Successive Ionic Layer Adsorption and Reaction (SILAR)
technique. Cadmium (II) Acetate (C4H6CdO4), Manganese (II) Acetate [Mn (CH3CO2)2]
and Sodium Sulfide (Na2S) used to prepare the mentioned quantum dots. Device
configuration of the fabricated QDSSC was FTO/TiO2 -P90/ TiO2
P25/CdS/MnS/electrolyte/Pt. Poly-sulfide redox couple was used as the electrolyte.
Solar cells resulted in an efficiency of 1.18 % with an open-circuit voltage of 467.9 mV
and a short-circuit current density of 8.94 mA cm-2, and fill factor of 28.2% under the
illumination of 100 mW cm2 with AM 1.5 spectral filter. Active area of the cell was
limited to 0.16 cm2. The efficiency of co-sensitized MnS QDSSC is 1.16 times greater
than only CdS quantum dot sensitized solar cells. Morphological, optical and electrical
characterizations of photoanodes and cells have been studied with standard methods.
They really supported to clarify the results.
