Improved photovoltaic efficiency on TiO2/In2S3 double layered electrodes

To enhance the photovoltaic efficiency of TiO2 multilayer, a scattering layer of In2S3 particle is designed in dye-sensitized solar cell system. The SEM image of In2S3 powder shows micro-sized 3D chrysanthemum-like shapes are formed by aggregation of wedge like nanosheets. The efficiency of the dye-sensitized solar cells assembled with In2S3 scattering layer is higher than the DSSC assembled with double layered TiO2 electrode. The short-circuit current density increases approximately 21.65% over TiO2/1.0 wt.% In2S3-DSSC and the incident photon-to-current conversion efficiency in the maximum peak also enhances about 17% compared to the DSSC assembled with double layered TiO2 electrode. Eventually, the maximum conversion efficiency obtained for TiO2/1.0 wt.% In2S3-DSSC is 5.80%. This result indicates that the double layered TiO2/In2S3 electrode acts as a scattering layer of incident light path and that an increasing array of current density is obtained with more photons, which thus improves the quantum efficiency. (C) 2014 Elsevier B.V. All rights reserved.