Ink-jet printing of polyaniline layers for perovskite solar cells

Polyaniline-based water-soluble ink has been developed to form hole-transport layers for perovskite solar cells by the ink-jet printing method. A study of the optical properties and surface morphology of layers composed of a complex of polyaniline and polysulfonic acid resulted in criteria determining the optimal conditions of their printing being suggested. The printed layers were found to be promising hole-transport layers for perovskite solar cells.