原位烷基化调控无机-有机杂化类钙钛矿材料的结构及其性能  

In situ Alkylation Regulation of the Structure and Properties of Inorganic-Organic Hybrid Perovskite-Like Materials

作　　者：梁广玲 叶晓亮 王观娥 徐刚[2,3] Liang Guang-ling;Ye Xiao-liang;Wang Guan-E;Xu Gang(College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007;State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002;University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]福建师范大学化学与材料学院,福州350007 [2]中国科学院福建物质结构研究所结构化学国家重点实验室,福州350002 [3]中国科学院大学,北京100049

出　　处：《化学学报》2022年第4期460-466,共7页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.91961115,21975254,21905280);中国科学院青年创新促进会(No.2018342)资助。

摘　　要：无机-有机杂化类钙钛矿材料由于结构可调和独特的光电特性而引起了人们的广泛关注.通过选用不同的烷基化溶剂,一步水热法原位合成了两种新型的无机-有机杂化材料——二维(2D)结构的[(Me_(3))ODA(Me_(3))]_(3)Pb_(5)I_(16) (1)和一维(1D)结构的[H(Et_(2))ODA(Et_(2))H]Pb_(2)I_(6)·H_(2)O (2) (ODA=4,4-二氨基二苯醚).化合物 1 由 2D 的无机类钙钛矿层[Pb_(5)I_(16)]^(6-)和有机阳离子[(Me_(3))ODA(Me_(3))]^(2+)组成,化合物 2 由 1D 无机类钙钛矿链[Pb_(2)I_(6)]^(2-)、有机阳离子[(Et_(2))ODA(Et_(2))]^(2+)和水分子组成.实验表明,两种不同维度的化合物虽然都具有典型的半导体性能,但却表现出不同的化学稳定性以及光、电等物理特性.其中,化合物 1 对波长为 400~700 nm 的光呈现出明显的光电响应,而化合物 2 在对水和有机溶剂表现出良好稳定性的同时,还表现出优异的湿敏响应性能.Inorganic-organic hybrid perovskite-like materials have attracted widespread attention due to their tunable structure and unique optoelectronic properties.By simply changing the size of the organic cations,the structural dimensions of inorganic-organic hybrid perovskite-like materials can be adjusted.However,most of the research were carried out by selecting different types of organic cationic ligands,which is not conducive to the study of structure-activity relationship.Herein,by choosing different alkylation solvents,the control of dimensions and performance of inorganic-organic hybrid perovskite-like materials was realized when the reaction precursors were consistent.Two new inorganic-organic hybrid materials were synthesized in situ by a simple one-step hydrothermal method,that were two-dimensional (2D)[(Me_(3))ODA(Me_(3))]_(3)Pb_(5)I_(16) (1) and one-dimensional (1D) [H(Et_(2))ODA(Et_(2))H]Pb_(2)I_(6)·H_(2)O (2) (ODA=4,4-diaminodiphenyl ether).Compound 1 is consisted by 2D inorganic perovskite-like network layers and [(Me_(3))ODA(Me_(3))]^(2+) organic dications,while compound 2 is composed by 1D inorganic perovskite-like chains,[H(Et_(2))ODA(Et_(2))H]^(2+) and water molecules.Compound 1 and 2 showed different structures and exhibited different stability,optoelectronics,and humidity sensitivity.The methylated compound 1 showed an obvious photoelectric response under visible light illumination (400~790 nm),and the ethylated compound 2 exhibited no photoelectric response.Compound 2 presented better stability to water and organic solvents compared to compound 1,which can be as an ideal candidate in fabricating smart and efficient sensors for humidity detection.The chemiresistive humidity sensor based on compound 2 showed an investigated response in the wide relative humidity (RH) (10%~100%) at room temperature.The sensor showed a high sensitivity in the range of 10%~100% RH and good cycle stability.It displayed 10~5-fold increase toward 100% RH.The sensing mechanism of the compound 2 based humidity sensor was f

关 键 词：无机-有机杂化 结构调控 光电响应 湿度传感 

分 类 号：TB34[一般工业技术—材料科学与工程]