水介质中丝阵脉冲放电冲击相变铯铅溴钙钛矿研究  

Study on Shock-induced Phase Transition of CsPbBr 3 through Pulsed Discharge of Cylindrical Wire Array in Water Medium

作　　者：张雪迎 高鑫 肖泽琦[1] 刘开源 岳丽丹 秦智奇 陈鹏万 ZHANG Xueying;GAO Xin;XIAO Zeqi;LIU Kaiyuan;YUE Lidan;QIN Zhiqi;CHEN Pengwan(School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 100081,China;Tangshan Research Institute,Beijing Institute of Technology,Tangshan 063000,Hebei,China;School of Materials Science&Engineering,Beijing Institute of Technology,Beijing 100081,China;Zhengzhou Research Institute,Beijing Institute of Technology,Zhengzhou 450045,Henan,China)

机构地区：[1]北京理工大学机电学院,北京100081 [2]北京理工大学唐山研究院,河北唐山063000 [3]北京理工大学材料学院,北京100081 [4]北京理工大学郑州研究院,河南郑州450045

出　　处：《兵工学报》2025年第2期145-154,共10页Acta Armamentarii

基　　金：北京理工大学青年教师学术启动计划项目(SQD-202002004);国家自然科学基金项目(12072037)。

摘　　要：相变和改性后的钙钛矿材料光电性能会发生巨大改变,对新一代光伏元件的研发有重要意义。然而,亚稳相钙钛矿的截留和制备技术尚不完善。冲击加载手段具有高淬火速率的优点,可以截留亚稳相,有利于亚稳相的回收和制备。为实现对铯铅溴钙钛矿(CsPbBr 3)的冲击相变处理,利用水介质中柱面铜丝阵脉冲放电,产生柱面汇聚冲击波,开展冲击相变研究。通过调节脉冲放电的充电电压,实现冲击压力的调控,对CsPbBr 3粉体进行不同压力的冲击处理,并回收样品。对回收样品进行的多种分析表征结果表明:在适当的冲击压力下(高于2 GPa),脉冲放电冲击波能引起CsPbBr 3粉体的相变,并实现回收;另外,亦可在回收样品中发现,晶粒细化、晶格畸变、纳米缺陷等冲击波处理后的典型现象;表明了水介质中柱面丝阵脉冲放电技术是一种可控的汇聚冲击波加载技术,提供了一种冲击相变加载的新方法。Perovskite is regarded as one potential material for next-generation photovoltaic devices owing to its outstanding photoelectric characteristics which can be easily adjusted by phase transitions.However,the technology for intercepting and preparing the metastable perovskites is still in its infancy.The impact loading method has a significant advantage of high quenching rate,and enables the capture of metastable phases and facilitating their subsequent recovery and preparation.To achieve the impact phase transition treatment of CsPbBr 3,the cylindrical converging shockwaves are generated by the pulsed discharge of cylindrical wire array in water medium for studying the shock-induced phase transition of CsPbBr 3.The delicate control of shock pressure is applied to act on CsPbBr 3 powder by adjusting the charging voltage.After experiments,the samples are recovered and characterized.The characterized results reveale that the shock waves generated by pulsed discharge can induce phase transition in CsPbBr 3 powder under appropriate shock pressures(above 2 GPa).Additionally,the typical phenomena such as grain refinement,lattice distortion and nano-defects are observed in the recovered samples after shock-wave treatment.This study demonstrates that pulsed discharge of cylindrical wire array in water medium is a feasible converging shock wave loading technique,providing a novel approach to shock-induced phase transition loading.

关 键 词：钙钛矿 脉冲放电 冲击波 汇聚效应 冲击相变 

分 类 号：TB39[一般工业技术—材料科学与工程]