The pyrolysis preparation of the compact and full-coverage AgSbS2 thin films and the photovoltaic performance of the corresponding solar cells

The preparation of the compact and full-coverage AgSbSthin films is firstly reported using the pyrolysis of the Ag-butyldithiocarbamate and Sb-butyldithiocarbamate complex solution in DMF. The influence of the preparation temperature on the crystal phase, optical absorption, morphology of the AgSbSthin films is systematically investigated. The AgSbSthin films at 150 °C for 30 min are composed of the individual nanoparticles with the particle sizes of 30–60 nm. When the AgSbSthin films are further heated at 350 °C for 2 min, the individual AgSbSnanoparticles are melted together and the grain boundary between the AgSbSnanoparticles disappear. The solar cells with the architecture of FTO/compact TiO/AgSbS/spiro-OMe TAD/Au achieve the photoelectric conversion efficiency(PCE) of 2.09%, along with the open-circuit voltage of 0.44 V, the short-circuit photocurrent density of 10.49 m A cm, the fill factor of 0.45. The PCE of 2.09% is the highest value for the AgSbSsolar cells.