A facile two-step preparation of compact and crystalline Sb2S3 thin film for efficient solar cells

Abstract

The two-step preparation of compact and crystalline Sb2S3 thin films was firstly reported using the pyrolysis of the Sb-butyldithiocarbamate complex solution in DMF. The porous and amorphous Sb2S3 thin films were successfully prepared at 170 °C for 30 min, and then can be converted to compact and crystalline Sb2S3 thin films at 200 °C for 30 min or 300 °C for 2 min. The corresponding solar cells with the architecture of FTO/TiO2 compact layer/Sb2S3/spiro-OMeTAD/Au achieved the photoelectric conversion efficiency of 4.16% at 200 °C and 5.05% at 300 °C. The two-step preparation of the compact and crystalline Sb2S3 thin films can provide the feasible approach for the fabrication of various microstructure thin film solar cells and the low preparation temperature of 200 °C was also attractive to assemble the flexible Sb2S3 thin film solar cells.