Solar cell with Pb(OH)xSy extremely thin absorber (eta) based on novel eta concept

Abstract

A new highly structured In(OH)xSy/Pb(OH)xSy/PEDOT: PSS solar cell has been developed based on the novel eta concept, and characterized by photovoltage spectroscopy, X-ray photoelectron spectroscopy, scanning electron spectroscopy, photovoltaic response and quantum efficiency spectroscopy. In this system, In(OH)x, PbS and PEDOT: PSS serve as electron conductor, light photon absorber material and hole conductor respectively. The electron conductor and absorber layer were prepared by chemical bath deposition, while the hole conductor was prepared by spin coating technique. The band gap of as prepared In(OH) xSy has been found to vary with pH of the solution; furthermore the bandgap of Pb(OH)xSy can be engineered to make it suitable as absorber material. At present, a solar cell device has been realized with efficiency up to over 1 %, Jsc =11. 7 mA/ cm2 and Vα =3.0 V.