Ferroelectricity is an attractive property for solar cell applications, as it allows one to manipulate the build-in field of the device, which will strongly influence all the performance parameters. Researchers have been devoted to looking for a ferroelectric material that simultaneously has good light absorption and electric transport properties for a long time. Here, we demonstrate a new way of combining state-of-art light absorption and electric transport properties with ferroelectricity, by the incorporation of room temperature 1D ferroelectric perovskite with 3D organic-inorganic hybrid perovskite (OIHP). PFM measurement unambiguously confirmed the 1D/3D mixed OIHP to be ferroelectric. After poling the device, we obtain a maximum power conversion efficiency of 22.7% in the 1D/3D mixed ferroelectric OIHP solar cell with increasing the FF to over 80% and V<sub>OC</sub> to 1.19.

Highly efficient 1D/3D ferroelectric perovskite solar cell

ACS Fall 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.