Unusual bendable soft molecule-based ferroelectric crystals enabling the flexible photo-pyroelectric detection  

作　　者：Liwei Tang Xinxu Zhu Yu Ma Haojie Xu Shiguo Han Yi Liu Yaoyao Chen Daohua Wang Junhua Luo Zhihua Sun 

机构地区：[1]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou,Fujian,the People's Republic of China [2]University of Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing,the People's Republic of China [3]Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou,Fujian,the People's Republic of China

出　　处：《InfoMat》2024年第10期44-52,共9页信息材料（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:22125110,U23A2094,22205233,22193042,21921001,U21A2069,22305248;Natural Science Foundation of Fujian Province,Grant/Award Numbers:2023J02028,2023J01235;Key Research Program of Frontier Sciences of Chinese Academy of Sciences,Grant/Award Number:ZDBSLY-SLH024;Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Grant/Award Number:2021ZR126;China Postdoctoral Science Foundation,Grant/Award Number:2023M733497。

摘　　要：Soft molecule-based ferroelectrics with unique structural flexibility hold apromise for versatile applications of non-volatile memory, imaging and photovoltaicdevices. Except for few polymers (e.g., polyvinylidene fluoride, PVDF),it is challenging to exploit soft ferroelectric crystals toward free-standing flexiblephotoactive devices. We here report a multiaxial soft molecule-based ferroelectric,(n-PA)_(2)PbCl_(4) (1, where n-PA^(+)is n-pentylammonium), of whichspontaneous polarization can be reversibly switched in both crystal and powderforms. Strikingly, single crystals of 1 have unusual structural flexibility andbendability, achieving the self-standing bending with a bending radius of0.22 mm. Besides, the pyroelectric activities are also preserved for these singlecrystals after several bending cycles. Further, the bendable crystal-basedphotodetector of 1 allows broadband photoactivities via the photo-pyroelectriceffect, covering a wide range from 405 to 940 nm spectral region, breakingthrough the limit of optical absorption bandgap. As the first study of bendablefree-standing photo-pyroelectric detectors in ferroelectric crystals, our worksheds light on the assembly of flexible smart photoelectric devices.

关 键 词：broadband photoresponse photo-pyroelectric effect self-standing bendable crystals soft molecular-based ferroelectric 

分 类 号：TN40[电子电信—微电子学与固体电子学]