Force-driven moisture-mediated CsPbBr_(3)nanocrystallization from amorphous glass  

非晶玻璃中力诱导-水分介导CsPbBr_(3)纳米晶化

作　　者：Peng Gao Hang Lin Pengfei Wang Ming Liu Ju Xu Yao Cheng Yuansheng Wang 高鹏;林航;王鹏飞;刘明;徐桔;程遥;王元生(State Key Laboratory of Structural Chemistry,Key Laboratory of Optoelectronic Materials Chemistry and Physics,Key Lab Design&Assembly Funct Nanostruct,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China;Fujian Provincial Key Laboratory of Terahertz Functional Devices and Intelligent Sensing,School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]State Key Laboratory of Structural Chemistry,Key Laboratory of Optoelectronic Materials Chemistry and Physics,Key Lab Design&Assembly Funct Nanostruct,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [2]Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China [3]Fujian Provincial Key Laboratory of Terahertz Functional Devices and Intelligent Sensing,School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China [4]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Science China Materials》2024年第10期3106-3114,共9页中国科学（材料科学）（英文版）

基　　金：supported by the National Natural Science Foundation of China(52372161,51972303,U2005213,and 11974350);the Science Fund for Distinguished Young Scholars of Fujian Province(2022J06030);the STS Project of Fujian-CAS(2022T3069);the 14th Five Year Scientific and Technological Innovation Planning Project of FJIRSM(CXZX-2022-GH11)。

摘　　要：While the“amorphous to crystalline”transformation process,which has significant potential for application,has been widely studied,the microscopic mechanism on the nanometer scale is not fully understood.In contrast to common heat-driven phase transformations,the present study demonstrated the force-driven moisture-mediated nanocrystallization of perovskite CsPbBr_(3)precipitated from a glass matrix.In the present case,the breakage of the glass network under shearing force produces high-energy sites to absorb H2O molecules/clusters from ambient moisture,and the hydration process promotes the crystallization process.Microscratch analysis combined with confocal laser scanning microscopy revealed that the distribution of CsPbBr_(3)nanocrystals almost reproduced that of the localized stress field and clearly reflected the crack propagation pathways.The potential applications of perovskite glass in the optical sensing of force and moisture are also explored.Our findings provide insight into crystal nucleation/growth in glass,as well as understanding the dynamics of crack propagation during the brittle fracture process.虽然“非晶到晶体”的相变过程已经被广泛研究,但迄今为止,我们对涉及纳米尺度上的微观机制仍不完全了解.与常见的热处理玻璃诱导析晶过程不同,我们在含Cs-Pb-Br组分的磷酸盐玻璃体系中发现了一种通过力诱导-湿度介导的特殊析晶机制.研究表明,剪切力作用下,玻璃网络被破坏,产生了高能位点,这些高能位点吸收来自环境湿气的H2O分子/团簇,随后玻璃组分的水化过程促进了CsPbBr_(3)纳米晶的析出.微观力学检测结合共聚焦激光扫描显微成像技术,揭示CsPbBr_(3)纳米晶的分布几乎复现了局域应力场的分布,并清晰地反映了裂纹扩展的传播路径.这一特殊的晶化机制,进一步验证了钙钛矿玻璃在力传感和湿度传感方面的潜在新应用.本工作为了解玻璃中晶体的形核/生长以及了解玻璃脆性断裂过程中裂纹的传播动力学提供了独特的视角.

关 键 词：LUMINESCENCE glass ceramic CRYSTALLIZATION optical materials optical sensing CsPbBr_(3) PEROVSKITE 

分 类 号：TQ171.1[化学工程—玻璃工业]