The Preparation of AgBiS2 Sensitized TiO2 Nanorod Array Solar Cells and Photovoltaic Performance of the Corresponding Solar Cells

In this paper, AgBiS2 was prepared on a TiO2 nanorod array via sequential spin-coating 5mM AgNO3 in DMF, 5mM Bi(NO3)(3) in DMF and 10mM Na2S in methanol/water (v/v, 95/5) by successive ionic layer absorption and reaction (SILAR) at room temperature. The effect of SILAR cycle times, C11H23COOH surface modification, and spiro-OMeTAD:P3HT application on the photovoltaic performance of the AgBiS2 sensitized solar cell was systematically investigated. The optimal SILAR cycle time for preparing the AgBiS2 sensitized TiO2 nanorod array was 20. The AgBiS2 sensitized solar cell exhibited a power conversion efficiency (PCE) of 0.56% with a 20 cycle time, 0.70% with C11H23COOH surface modification and 0.91% with spiro-OMeTAD:P3HT.