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Magnetism and Transport Properties for Organic-Inorganic Perovskite Films

有机-无机钙钛矿薄膜的磁性和传输特性

基本信息

批准号：
09650001
负责人：
ANDO Yasuo
金额：
$ 2.5万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650001/
关键词：
Organic Inorganic Perovskite Photo-induced Magnetism Transport Nephthalene

项目摘要

Metal halide-based layered perovskites, (RNH_3)_2MX_4, self-organized organic/inorganic multilayer structure were synthesized, where R is a simple alkylammonium molecule with a long chain length, (CH_3(CH_2)_<17>), methyl-benzene C_6H_5-CH_2, 1-methyl-naphthalene 1-C_<10>H_9-CH_2, 1-propylnaphthalene 1-C_<10>H_9-O(CH_2)_3 and 1-butyl-naphthalene 1-C_<10>H_9-O(CH_2)_4, M is 3d transition metal elements (Cr, Mn, Fe, Co, Ni, Cu, Zn), X is Cl and Br. Its layered perovskite structure was checked by a FT-IR method. The perovskites of CH_3(CH_2)_<17>NH_3 with Cu and Cr showed ferromagnetism (T_c7=10 K and 42 K, respectively), and Mu and Fe antiferromagnetism (T_N=41 K and 95 K, respectively). These results roughly corresponded to the results for methyl and ethyl ammonium complexes reported. The naphthlene complex with Cu also showed ferromagnetism, however, the Curie temperature became low. It was considered that the relative large chromophore might disturb the Jahn-Teller distortion of CuCl_6, octahedra. 1-methyl-naphthylamine- hydrochloride was luminous with the wavelength of 350 nm under ultraviolet light irradiation, but its Cu complex was quenched. Origin of different Curie temperatures, T_c, depending on the structure of the molecule were explained by taking into account of the overlap of the electronic states between the organic and the inorganic layers.

合成了金属卤化物基层状钙钛矿（RNH_3）_2MX_4，自组织有机/无机多层结构，其中R为长链烷基铵分子，（CH_3（CH_2）_<17>），甲苯C_6H_5-CH_2，1-甲基萘1-<10>C_H_9-CH_2，1-丙基萘1-C_H_9<10>-O（CH_2）_3和1-丁基萘1-C_H_9-O（<10>CH_2）_4，M为3d过渡金属元素（Cr，Mn，Fe，Co，Ni，Cu，Zn），X为Cl和Br。用FT-IR方法对其层状钙钛矿结构进行了表征。CH_3（CH_2）_NH_3<17>与Cu和Cr的钙钛矿结构显示铁磁性（Tc_7分别为10 K和42 K），Mu和Fe的反铁磁性（T_N分别为41 K和95 K）。这些结果大致对应于所报道的甲基和乙基铵络合物的结果。与铜的萘配合物也表现出铁磁性，但居里温度变低。认为较大的生色团可能干扰CuCl_6八面体的Jahn-Teller畸变。在紫外光照射下，1-甲基萘胺盐酸盐在350 nm波长处发光，但其铜配合物被猝灭。考虑到有机层和无机层之间电子态的重叠，解释了不同分子结构的居里温度T_c的原因。