溶剂辅助CsPbBr3无机钙钛矿量子点薄膜自组装及光学性能研究  

Self-assembly and optical properties of solvent-assisted CsPbBr3 inorganic perovskite quantum dot films

作　　者：陈玲芝 柳维端 甘泽 陈思琦 李岳彬[1,2] CHEN Lingzhi;LIU Weiduan;GAN Ze;CHEN Siqi;LI Yuebin(Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices, Faculty of Physical and Electronic Sciences,Hubei University, Wuhan 430062, China;Ministry-of-Education Key Laboratory for the Synthesis and Applicationof Organic Functional Molecules(Hubei University), Wuhan 430062, China)

机构地区：[1]铁电压电材料与器件湖北省重点实验室,湖北大学物理与电子科学学院,湖北武汉430062 [2]有机功能分子合成与应用教育部重点实验室(湖北大学),湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2020年第6期675-680,共6页Journal of Hubei University：Natural Science

基　　金：有机功能分子合成与应用教育部重点实验室开放课题基金(KLSAOFM1905);大学生创新创业项目(201810512089,201910512019)资助。

摘　　要：在高沸点有机溶剂中,利用热注入法制备CsPbBr3无机钙钛矿量子点.采用透射电子显微镜、扫描电子显微镜、X线衍射仪、紫外-可见光吸收光谱仪和荧光光谱仪分析其形貌、晶相和光学性能.发现所制备的CsPbBr3无机钙钛矿纳米晶分散性良好,在400~510 nm波段光学吸收强烈,在509~530 nm波段发出强烈绿色荧光.采用乙酸乙酯/正己烷混合溶液进行洗涤,调控表面配体附着量.利用动态配体-表面界面对溶剂极性的敏感性,触发角对角或边对边组装,获得均匀致密,表面粗糙度仅约为3 nm的CsPbBr3无机钙钛矿纳米晶薄膜,在新型光电器件上具有更广泛的应用前景.CsPbBr3 inorganic perovskite quantum dots were prepared by thermal injection method in organic solvents with high boiling point.The morphology,crystal phase and optical properties were analyzed by transmission electron microscope,scanning electron microscope,X-ray diffractometer,ultraviolet-visible absorption spectrometer and fluorescence spectrometer.It was found that the prepared CsPbBr3 inorganic perovskite nanocrystals exhibited good dispersibility,a strong optical absorption in the band from 400 to 510 nm,and a strong green fluorescence in the band from 509 to 530 nm.The mixed solution of ethyl acetate and n-hexane was used for washing to modulate the amount of surface ligand molecules on the nanocrystals.The sensitivity of the dynamic ligands-surface to the polarity of the solvent was used to trigger the diagonal or side-to-side assembly,to obtain uniform and dense CsPbBr3 inorganic perovskite nanocrystalline thin film with a surface roughness of 3 nm approximately,which exhibited broad application prospect in new photoelectric devices.

关 键 词：无机钙钛矿量子点 溶剂辅助 自组装薄膜 

分 类 号：TB324.1[一般工业技术—材料科学与工程]