光敏铁电材料同时具有铁电性和光吸收相关性质，在多源能源转化、信息存储和多功能传感领域有广泛的应用前景。当前研究集中在如何调节铁电材料的物理化学性质实现光伏性能的优化，而光对铁电性的影响却缺乏认知。铁电聚合物具有比氧化物更稳定的光学、化学性质和易加工性，但其电极化强度低。本项目通过构建P(VDF-TrFE)/MAPbBr3复合体系，巧妙的利用光电金属卤化物钙钛矿的光致伸缩效应与铁电聚合物的压电效应相耦合，产生全新的光致电极化‘积性能’，实现巨光控电极化效应。系统研究复合材料的光、电特性，光控电极化效应及外场的调控作用，获得多场作用下复合材料光、电响应规律，建立复合材料的微/介观结构、两相界面物理化学性质与光控电极化效应内在关联，揭示复合光敏铁电材料中光子-晶格-电荷耦合机制，为发展新型多功能光电子器件、传感器件以及能量收集装置提供理论依据。

Photoferroelectric materials possess both ferroelectricity and light absorption properties, they are quite promising for the applications in the fields of multi-energy conversion, information storage and multifunctional sensing. At present, most of the research focus on the controlling of photovoltaic effect via ferroelectric properties, while, little is known about how the light influences the ferroelectricity. Compared with ferroelectric oxides, polymers show better photostability, chemical stability, and easy processability. However, the polarization of polymer is still low and new approach is necessary for breakthrough. Here, we design the P(VDF-TrFE)/MAPbBr3 composites based on the idea that the product property between the photostriction effect from MAPbBr3 and piezoelectric effect from P(VDF-TrFE) would result in giant ferroelectric polarization induced by light. The optical and electrical properties, light induced polarization effect and their responses to the external fields would be studied comprehensively. The intrinsic connection between the micro/macrostructures, the physical and chemical properties of the constituents around interfaces and the light induced polarization effect will be established. Moreover, the coupling effect among photon, lattice and charge in the photoferroelectric composites will be revealed. The studies shall provide physical fundamentals for developing new multifunctional optoelectronic devices, sensors and energy harvesting devices.