高硬度六亚甲基四胺基无金属钙钛矿单晶及其高性能X射线探测  

High hardness metal-free perovskite based on hexamethylenetetramine for efficient X-ray detection

作　　者：宋鑫 李特伦 李昊瑾 林舒怡 殷骏 赵奎 Xin Song;Telun Li;Haojin Li;Shuyi Lin;Jun Yin;Kui Zhao(Key Laboratory of Applied Surface and Colloid Chemistry,National Ministry of Education,Shaanxi Key Laboratory for Advanced Energy Devices,Shaanxi Engineering Lab for Advanced Energy Technology,Institute for Advanced Energy Materials,School of Materials Science and Engineering,Shaanxi Normal University,Xi'an 710119,China;Advanced Membranes and Porous Materials Center(AMPM),King Abdullah University of Science and Technology(KAUST),Physical Sciences and Engineering Division(PSE),Thuwal 23955-6900,Saudi Arabia;Department of Applied Physics,The Hong Kong Polytechnic University,Hong Kong 999077,China)

机构地区：[1]Key Laboratory of Applied Surface and Colloid Chemistry,National Ministry of Education,Shaanxi Key Laboratory for Advanced Energy Devices,Shaanxi Engineering Lab for Advanced Energy Technology,Institute for Advanced Energy Materials,School of Materials Science and Engineering,Shaanxi Normal University,Xi'an 710119,China [2]Advanced Membranes and Porous Materials Center(AMPM),King Abdullah University of Science and Technology(KAUST),Physical Sciences and Engineering Division(PSE),Thuwal 23955-6900,Saudi Arabia [3]Department of Applied Physics,The Hong Kong Polytechnic University,Hong Kong 999077,China

出　　处：《Science China Materials》2024年第4期1348-1355,共8页中国科学（材料科学）（英文版）

基　　金：supported by the National Natural Science Foundation of China (51933010 and 61974085);the 111 Project (B21005), the National University Research Fund (GK202201005);the National 1000-talent-plan Program (1110010341)。

摘　　要：无金属卤化物钙钛矿(MFHaP)因其出色的光电性质、化学兼容性、轻量级特征和环保性能,受到了广泛关注.传统的MFHaPs材料主要是在A位采用DABCO^(2)+(1,4-二氮杂二环[2.2.2]辛烷)及其衍生物和B位采用铵根离子组成的,这种结构一般都有较低的硬度和高的离子迁移.为了克服这些难题,我们通过在A位引入了笼状有机阳离子六亚甲基四胺(hmta^(2+)),成功合成了具有较高机械硬度(1.5 GPa)的hmtaNH_(4)Br_(3)单晶.这主要得益于hmta-NH_(4)Br_(3)单晶中较短的氢键和更接近1的容忍因子.此外,hmta-NH_(4)Br_(3)单晶还表现出优异的结构稳定性和环境稳定性.采用低缺陷hmta-NH_(4)Br_(3)单晶构建的X射线探测器不仅大幅减少了离子迁移,还实现了150μC Gyair^(-1)cm^(-2)的高灵敏度,展现了其在高能辐射检测领域的巨大潜力.Organic-inorganic halide perovskites,particularly those containing lead ion,have emerged as promising semiconducting materials due to their exceptional photoelectric and physical properties.These materials have shown significant potential in various applications,including highly efficient solar cells,lightemitting diodes(LEDs),lasers,field-effect transistors,ferroelectrics,and photodetectors[1-5].However,the toxicity associated with lead(Pb)presents severe environmental and health risks,necessitating the replacement of lead with a less toxic element while maintaining performance levels[6-10].

关 键 词：六亚甲基四胺 离子迁移 金属卤化物 有机阳离子 环境稳定性 X射线探测 钙钛矿 高能辐射 

分 类 号：TL816.1[核科学技术—核技术及应用] TB34[一般工业技术—材料科学与工程]