Investigation of Photo-electrode and Counter Electrode Effect on DSSCs Based on Indoline Dyes

Photovoltaic systems, for example, dye-sensitized solar cells (DSSCs), are one of the useful tools for producing renewable and green energy. To develop DSSCs technology, it is necessary to overcome obstacles such as the need for expensive compounds. Organic dyes system containing responsible group for using in dye-sensitized solar cells and effective anchoring group for improving interaction between dye (photosensitizers) and nanolayer were designed and prepared. A series of DSSCs were designed and manufactured based on organic dyes as photosensitizers. The π-electrons in the HOMO orbitals of the dyes are delocalized only in dyes 1 and 2. A new MoS2/GO hybrid or composite was also employed instead of platinum. The DSSCs were prepared using MoS2/GO hybrid or composite and compared with that containing platinum. Under same conditions, the DSSCs with MoS2/GO composite illustrated better efficiency than MoS2/GO hybrid. The proposed dyes used as photosensitizer in a dye solar cell structure in the presence of Na-doped TiO2 and their photovoltaic properties investigated. The highest PCE in the presence of GO/MoS2 nanocomposite as opposite electrode and TiO2 and Na-doped TiO2 is 5.14 and 5.48, respectively, and corresponds to dye 8. The improved performance of Na doped TiO2 based DSSC could be attributed to the enhancement in optical properties of the sample by decreasing the intrinsic defects.