Efficiency Enhancement with the Ferroelectric Coupling Effect Using P(VDF-TrFE) in CH₃NH₃PbI₃ Solar Cells.

ABSTRACT: A novel ferroelectric coupling photovoltaic effect is reported to enhance the open-circuit voltage (V _OC) and the efficiency of CH₃NH₃PbI₃ perovskite solar cells. A theoretical analysis demonstrates that this ferroelectric coupling effect can effectively promote charge extraction as well as suppress combination loss for an increased minority carrier lifetime. In this study, a ferroelectric polymer P(VDF-TrFE) is introduced to the absorber layer in solar cells with a proper cocrystalline process. Piezoresponse force microscopy (PFM) is used to confirm that the P(VDF-TrFE):CH₃NH₃PbI₃ mixed thin films possess ferroelectricity, while the pure CH₃NH₃PbI₃ films have no obvious PFM

SUBMITTER: Jia E 

PROVIDER: S-EPMC6702631 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature