Development of MAPbI3.H2O and MAPbI3 perovskite solar cells using TiO2 and P3HT as charge transport layers

MAPbI 3 .H 2 O and MAPbI 3 perovskite based solar cells were investigated using TiO 2 and P3HT as charge transport layers at ambient conditions. The transparent conducting oxide, fluorine doped tin oxide, coated glass slide serves as substrate during the cell fabrication process. Spin coating technique was employed to fabricate the cells with compact TiO 2 (c-TiO 2 ) and mesoporous TiO 2 (m-TiO 2 ) stack as an electron transport layer and P3HT as a hole transport layer. The structures of MAPbI 3 .H 2 O and MAPbI 3 perovskites were studied by single crystal XRD which confirms that the prepared crystals belong to tetragonal and monoclinic systems respectively. The layer properties of c-TiO 2 and m-TiO 2 were studied by powder XRD and FESEM analysis. Well defined sharp photoluminescence peaks of MAPbI 3 .H 2 O and MAPbI 3 perovskites observed at 840 and 781 nm respectively confirm direct band gap nature of the materials. Solar cells were successfully fabricated with controlled growth rate of the various layers. The FESEM cross-section provides information regarding the thickness of each layer in the cell. The dark J–V characteristics of the prepared cells were evaluated as proof of the concept.