【作者】 李丽娜； 孙志华； 罗军华；

【Author】 Lina Li;Zhihua Sun;Junhua Luo;Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences;

【机构】 中国科学院福建物质结构研究所；

【摘要】 铁电材料因在光电方面的应用受到广大科研工作者的关注,铁电体中对称性破缺引起的自发极化有利于光生载流子的分离,从而产生优异的光电特性,如反常铁电光伏、自驱动光电探测等[1, 2]。相对于纯无机铁电体,有机-无机杂化铁电体具有制备成本低、易器件化等优点。结合有机-无机杂化钙钛矿材料独特的光电特性和可调的结构特性,我们课题组以三维有机-无机杂化钙钛矿为结构模板,通过引入大尺寸柔性有机胺阳离子的设计策略设计合成了系列具有铁电极化特性的多层杂化钙钛矿材料[3–6]。系统研究了此类钙钛矿材料的铁电相变机制和光电性能,并深入探究了材料中铁电自发极化对其光电性能的影响,实现了有机-无机杂化钙钛矿铁电材料的高效光电探测。更多还原

【Abstract】 Ferroelectric materials have attracted intense attention due to their application in the field of photoelectricity. The inversion symmetry breaking inducing spontaneous electric polarization promotes the desirable separation of photo-excited carriers to generate prominent optoelectronic performance, including abnormal ferroelectric photovoltaic, self-driven photoelectric detection, and so on[1, 2] Compared with pure inorganic ferroelectrics, organicinorganic hybrid ferroelectrics take the advantages of relatively low synthesis cost and facile device fabrication. According to the distinct optoelectronic properties and structure adjustability of organic-inorganic perovskite, we designed and synthesized series of multilayer hybrid perovskite materials featuring ferroelectric polarization by introducing large size flexible organic amine into three dimensional organic-inorganic perovskite.[3–6].The ferroelectric phase-transition mechanism and photoelectric properties of such perovskite materials were systematically studied. We further investigated the effect of ferroelectric spontaneous polarization on the photoelectric properties. Finally, high-performanced photoelectric detections of such organic-inorganic hybrid perovskite ferroelectrics were acquired.更多还原