金属溴化物钙钛矿量子点的墨水法合成及其发光调控  

Synthesis of Metal Bromide Perovskite Quantum Dots and Their Controllable Emission

作　　者：张鸿博 牛晨 田淑芳[2] ZHANG Hong-bo;NIU Chen;TIAN Shu-fang(Experimental School,Middle School Affiliated to Henan University,Kaifeng 475001,China;College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,China)

机构地区：[1]河南大学附属中学实验学校,河南开封475001 [2]河南大学化学化工学院,河南开封475004

出　　处：《安徽化工》2019年第1期62-63,67,共3页Anhui Chemical Industry

摘　　要：采用墨水法,以溴化铯、溴化铅为源,以油酸为配体,在甲苯体系中室温下空气中快速合成Cs PbBr3钙钛矿量子点。该方法操作简单,能耗较低,而且能够通过控制配体的量,实现对钙钛矿量子点尺度的控制,当配体量增大时,量子点的尺寸由～12 nm减小到～5 nm。在反应过程中,配体的螯合阻止了量子点的进一步生长,同时,通过对样品的光致发光特性测量发现,较小的CsPbBr_3钙钛矿量子点的光发射峰在490 nm,大尺寸量子点的发光峰在515 nm,小尺寸量子点的荧光发射发生了蓝移,验证了小尺寸量子点的量子限域效应。因此,该方法不仅可以方便、快捷地应用于金属卤化物钙钛矿量子点的制备,而且能够调控量子点的光发射。We developed an ink method to synthesize CsPbBr3 perovskite quantum dots using CsBr and PbBr2.This method is easy for operation,and can be carried out under ambient conditions.Moreover,this process can be finished in short time.At the same time,the size of CsPbBr3 quantum dots can be controlled by changing the amount of ligand in solution.According to their photoluminescence spectra,it is found that the emission peak of small quantum dots shifts blue from 515 nm of large quantum dots to 490 nm due to quantum confinement effect.

关 键 词：钙钛矿 量子点 光致发光 量子限域效应 

分 类 号：O621.22[理学—有机化学]