Abstract:
The photo anodes in dye sensitized solar cells (DSSCs) with two different morphologies such as one
dimensional nanorods and nanoparticles of TiO2 were utilized for improving the short circuit current
density of the device. The synergistic effect of both structures offer high Jsc by providing better pathway
for the electron transportation through one dimensional nanorod morphology and efficient light
absorption due to more dye adsorption on the mesoporous nanoparticles. The performance analysis of the
dye sensitized solar cells were done by using photo anodes of three different combinations, such as
compact layer with mesoporous nanoparticles (CM), compact layer with nanorod structure (CR) and finally
compact layer with both the nanorods and mesoporous nanoparticle as a bilayer assembly (CRM).The
FESEM images confirm the presence of vertically aligned nanorods and they are perpendicular to the
substrate surface. XRD and RAMAN studies confirm the crystalline nature of synthesized bilayer film was a
mixture of anatase and rutile phase of TiO2. The absorption and emission properties for the synthesized
samples were studied using UV-Vis and Photoluminescence (PL) spectroscopy. The efficiency of the solar
cells with the photo anodes of CR, CM and CRM were found to be 0.30%, 4.41% and 4.23% respectively.First figure shows the FESEM images of the top view of compact layer and TiO2 nanorods (1&2),
cross sectional view of compact layer and TiO2 nanorods (3&4) and second figure represents J-V graph of
CR, CM layers and CRM bilayer assembly.
