Performance of TiO2/CdS/Bi2S3 heterostructure based semiconductor sensitized solar cell

The photovoltaic characteristics of TiO2/CdS/Bi2S3 quantum dots based solar cell is reported here. TiO2 nanospheres were synthesized by a rapid microwave treatment and CdS quantum dots were grown on the TiO2 by successive ionic layer adsorption and reaction (SILAR) method optimizing the microwave irradiation time. XRD results reveal that all the obtained TiO2 samples are of tetragonal structure. Morphology of these TiO2 appear as nanospheres from SEM and TEM measurements with sizes ranging from 200 to 300 nm. J-V measurements on TiO2/CdS/Bi2S3 structure based solar cell show a maximum photocurrent of 7.23 mA/cm2, open circuit voltage 0.4 V, fill factor 0.35 and efficiency 1.012 % compared to other configurations. This enhancement is due to the synergistic assistance of CdS/Bi2S3 structure in increasing the charge transfer rates, extension of the photo-absorption range and hence the light harvesting capacity. Hence these types of heterostructures can be effectively used in photovoltaic devices.The photovoltaic characteristics of TiO2/CdS/Bi2S3 quantum dots based solar cell is reported here. TiO2 nanospheres were synthesized by a rapid microwave treatment and CdS quantum dots were grown on the TiO2 by successive ionic layer adsorption and reaction (SILAR) method optimizing the microwave irradiation time. XRD results reveal that all the obtained TiO2 samples are of tetragonal structure. Morphology of these TiO2 appear as nanospheres from SEM and TEM measurements with sizes ranging from 200 to 300 nm. J-V measurements on TiO2/CdS/Bi2S3 structure based solar cell show a maximum photocurrent of 7.23 mA/cm2, open circuit voltage 0.4 V, fill factor 0.35 and efficiency 1.012 % compared to other configurations. This enhancement is due to the synergistic assistance of CdS/Bi2S3 structure in increasing the charge transfer rates, extension of the photo-absorption range and hence the light harvesting capacity. Hence these types of heterostructures can be effectively used in photovoltaic devices.