中文摘要：

铁电材料由于具有反常的光伏效应（光生电场高达103~105 V/cm）,理论上存在较高的光电转换效率,在太阳能光伏领域具有潜在的应用前景而备受关注。然而,由于铁电材料带隙通常较大、导电性差等因素导致其光生电流较低、光电转换效率还有待进一步提高。弄清铁电光伏效应是增强其转换效率的重要前提。但关于铁电材料光伏效应的起源目前还没有定论,其机制也一直存在争议。基于以上考虑,本文综述了铁电薄膜光伏效应的研究进展,详细阐述了影响光伏效应的各种因素及铁电薄膜光伏效应的机制,并提出了亟待解决的问题。

英文摘要：

Ferroelectrics, which should have higher conversion efficiency theoretically due to its abnormal photovoltaic effect（the photovoltage is as large as 103 ~ 105 V/cm）, has become a new focus of attention in potential application prospect of solar photovoltaic field. However, the photo-electric conversion efficiency is needed to be enhanced further because of its relatively wide band gap and lower conductance. Therefore, it is of great importance to make clear the mechanism of photovoltaic effect so as to increase the conversion efficiency. Yet, there is no final conclusion about the origin of photovoltaic effect and it is still in controversial. Based on above consideration, this paper reviews the research progress in photovoltaic effect of ferroelectric thin films, the mechanisms of ferroelectric photovoltaic effect are elaborated in details and some programs urgent needed solved as also proposed.