摘要
针对传统全无机钙钛矿量子点的合成方法中需要惰性气体保护、操作复杂、仪器成本高等问题,采用一种优化的较低温注入法,在大气环境下制备了全无机卤化物钙钛矿CsPbX_(3)(X=Cl,Br,I)量子点。通过将前驱体在120℃下混合并转移至90℃下发生反应,合成了可以覆盖整个可见光光谱区域的多色钙钛矿量子点,并通过稳态和时间分辨荧光光谱仪表征其发光特性。结果表明:在波长325 nm的激发光激发下,CsPbBr_(3)量子点峰位在517 nm处,为窄的半高宽(16.3 nm)的发射峰。量子点的荧光呈双指数衰减,平均寿命5.77 ns。CsPbBr_(3)量子点属于立方晶相,呈均匀单分散的立方体形状,平均晶粒尺寸9.89 nm。该制备方法为全无机卤化物钙钛矿CsPbX_(3)(X=Cl、Br、I)量子点的合成提供了新的方案。
The traditional synthesis method of all-inorganic perovskite quantum dots(QDs)requires inert gas protection,complicated operations,and high instrument cost,an optimized lower temperature method,featured with low-cost,and direct synthesis in the ambient atmosphere was proposed.Multicolored perovskite QDs were synthesized by mixing the precursors at 120℃and transferring them to 90℃for reaction,which covered the whole region of visible light region.Their luminescence properties were characterized by steady-state and time-resolved fluorescence spectrophotometers.Under the excitation of 325 nm light,CsPbBr_(3) QDs exhibited a narrow emission peak at 517 nm with the full width at half maximum 16.3 nm.PL decay curve of CsPbBr_(3) QDs can be two-exponent fitted,the average lifetime of 5.77 ns.The CsPbBr_(3) QDs belong to cubic crystal phaseare,are homogeneous and monodispersed in cube shape,with an average grain size of 9.89 nm.This method provides a new scheme for the synthesis of all-inorganic perovskite QDs.
作者
袁耀欣
张瑞
张建峰
陈刚
刘海运
洪梦庆
罗凤凤
YUAN Yaoxin;ZHANG Rui;ZHANG Jianfeng;CHEN Gang;LIU Haiyun;HONG Mengqin;LUO Fengfeng(School of Applied Science,Taiyuan University of Science and Technology,Taiyuan 030024,China;The Institute of Technological Sciences ,Wuhan University,Wuhan 430072,China;Institute of Applied Physics,Jiangxi Academy of Science,Nanchang 330096,China)
出处
《西安工程大学学报》
CAS
2021年第2期91-96,共6页
Journal of Xi’an Polytechnic University
基金
国家自然科学基金项目(11705124)
山西省高等学校科技创新项目(2020L0335)
山西省“1331工程”重点创新团队项目(1331KIRT)
江西省科学院重点科研开发项目(2020-YZD-19)
中央高校基本科研业务费专项基金项目(2042020kf0002)。
