题目：

Polarized Ferroelectric Polymers for High-Performance Perovskite Solar Cells

作者：

Cong-Cong Zhang¹, Zhao-Kui Wang¹,* Shuai Yuan¹, Rui Wang², Meng Li¹, Musibau Francis Jimoh², Liang-Sheng Liao¹,* and Yang Yang²*

单位：

¹Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices,Institute of Functional Nano & Soft Materials (FUNSOM),Soochow University, Suzhou 215123, China.

²Department of Materials Science and Engineering,University of California,Los Angeles, CA 90095, USA.

摘要：

In hybrid organic–inorganic lead halide perovskite solar cells, the energy loss is strongly associated with nonradiative recombination in the perovskite layer and at the cell interfaces. Here, a simple but effective strategy is developed to improve the cell performance of perovskite solar cells via the combination of internal doping by a ferroelectric polymer and external control by an electric field. A group of polarized ferroelectric (PFE) polymers are doped into the methylammonium lead iodide (MAPbI₃) layer and/or inserted between the perovskite and the hole-transporting layers to enhance the build-in field (BIF), improve the crystallization of MAPbI₃, and regulate the nonradiative recombination in perovskite solar cells. The PFE polymer-doped MAPbI₃ shows an orderly arrangement of MA⁺ cations, resulting in a preferred growth orientation of polycrystalline   perovskite films with reduced trap states. In addition, the BIF is enhanced by the widened depletion region in the device. As an interfacial dipole layer, the PFE polymer plays a critical role in increasing the BIF. This combined effect leads to a substantial reduction in voltage loss of 0.14 V due to the efficient suppression of nonradiative recombination. Consequently, the resulting perovskite solar cells present a power conversion efficiency of 21.38% with a high open-circuit voltage of 1.14 V.

影响因子：

25.809

分区情况：

一区

链接：

https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201902222

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