Highly Efficient 1D/3D Ferroelectric Perovskite Solar Cell

Abstract

With the capability to manipulate the built‐in field in solar cells, ferroelectricity is found to be a promising attribute for harvesting solar energy in solar cell devices by influencing associated device parameters. Researchers have devoted themselves to the exploration of ferroelectric materials that simultaneously possess strong light absorption and good electric transport properties for a long time. Here, it is presented a novel and facile approach 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). The 1D/3D mixed OIHP films are found to exhibit evident ferroelectric properties. It is notable that the poling of the 1D/3D mixed ferroelectric OIHP solar cell can increase the average Voc can be increased from 1.13 to 1.16 V, the average PCE from 20.7% to 21.5%. A maximum power conversion efficiency of 22.7%, along with an enhanced fill factor of over 80% and open‐circuit voltage of 1.19 V, can be achieved in the champion device. The enhancement is by virtue of reduced surface recombination by ferroelectricity‐induced modification of the built‐in field. The maximum power point tracking measurement substantiates the retention of ferroelectric‐polarization during the continued operation.

Review of Two‐Step Method for Lead Halide Perovskite Solar Cells

“…Especially, 92% initial PCE could be maintained after 1500 h under one sun illumination. Zhan et al [ 133 ] used [(CH 3 ) 3 NCH 2 I]I (TMIMI) to prepare a 1D/3D hybrid perovskite film that showed excellent ferroelectric properties. It was worth noting that the polarization of 1D/3D hybrid ferroelectric solar cells could increase the average V OC from 1.13 to 1.16 V, and the average PCE from 20.7% to 21.5%.…”

High‐Polarizability Organic Ferroelectric Materials Doping for Enhancing the Built‐In Electric Field of Perovskite Solar Cells Realizing Efficiency over 24%

“…[21] Moreover, the designable Lewis base/acid substituents in OFeMs enable us to regulate the defect states and crystallization dynamics of the perovskites. [22][23][24] In addition, the polarization orientations in the microstructures of the OFeM domains are likely to switch along with variations in the external electric field directions. [25] When the dipole moment direction is aligned with that of the device BEF, the BEF strength is further enhanced, which is beneficial for the separation and extraction of the photogenerated carriers.…”

Assessment of Lead‐Free Tin Halide Perovskite Solar Cells Using J–V Hysteresis

“…In perovskite-based solar cells, the origin of hysteresis is considered due to the ferroelectric nature of this materials. [59,[84][85][86][87] In ferroelectric perovskite materials, the charge carriers move along domain boundaries; hence, the device architectures (i.e., planar or mesoporous) played an important role in estimating the magnitude of hysteresis. Hysteresis becomes severe in planar heterojunction than mesoporous because, in mesoporous structure, perovskite ferroelectric domains are weak because dipoles have high random orientations.…”