Efficient perovskite solar cells based on low-temperature solution-processed (CH(3)NH(3))PbI(3) perovskite/CuInS(2) planar heterojunctions

In this work, the solution-processed CH(3)NH(3)PbI(3) perovskite/copper indium disulfide (CuInS(2)) planar heterojunction solar cells with Al(2)O(3) as a scaffold were fabricated at a temperature as low as 250°C for the first time, in which the indium tin oxide (ITO)-coated glass instead of the fluorine-doped tin oxide (FTO)-coated glass was used as the light-incidence electrode and the solution-processed CuInS(2) layer was prepared to replace the commonly used TiO(2) layer in previously reported perovskite-based solar cells. The influence of the thickness of the as-prepared CuInS(2) film on the performance of the ITO/CuInS(2)(n)/Al(2)O(3)/(CH(3)NH(3))PbI(3)/Ag cells was investigated. The ITO/CuInS(2)(2)/Al(2)O(3)/(CH(3)NH(3))PbI(3)/Ag cell showed the best performance and achieved power conversion efficiency up to 5.30%.