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Gram-scale synthesis of all-inorganic perovskite quantum dots with high Mn substitution ratio and enhanced dual-color emission

查看全文 作　　者：Lvming [1,2]Dong;Zhuo [1,2]Chen;Lei [1,2]Ye;Yan [1,2]Yu;Jianbing [1]Zhang;Huan [1]Liu;Jianfeng [1,2]Zang 高影响力作者 机构地区：[1]School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China;[2]Innovation Institute,Huazhong University of Science and Technology,Wuhan 430074,China高影响力机构 出　　处：《Nano Research》索引2019年第12卷第7期,共6页高影响力期刊 基　　金：supported by the National Key Research and Development Program of China (No.2018YFB1105100);the National Natural Science Foundation of China (Nos.51572096 and 61704061). 摘　　要：Mn-doped all-inorganic perovskite quantum dots (QDs) provide prominent applications in the fields of low-cost light source or display,because of their remarkable properties including dual-color emission and reduced lead content,as well as high photoluminescence quantum yields (PLQYs) and high stability.However,the existing synthesis approaches usually require hash conditions,such as high temperature and nitrogen protection,which is a major hurdler for the practical manufacturing.In addition,the significantly high Mn substitution ratio in CsPbX3 QDs is still challenging.The real dual-color emission with two strong emission peaks in the Mn-doped all-inorganic perovskite QDs has attracted great interest.Here we present a gram-scale approach to synthesize both CsPbxMn1-xCI3 and CsPb1-xMnxClyBr3-y QDs at 100 ℃ in the air with high Mn substitution ratio,up to 55.64% atomically.The as-prepared CsPb1-xMnxClyBr3-y QDs exhibit high PLQYs of 62.41% and dual-color emission with two strong emission peaks around at 400-450 nm and 600 nm,respectively.The enhanced peak at 400-450 nm is a result of the hybrid halides in CsPbBrxCl3-x host.Furthermore,the unique advantage of the optical emission and high PLQYs properties of the CsPbxMn1-xCl3 QDs has been demonstrated as invisible ink for encryption applications and polymer composites.Our gram-scale synthesis approach for Mn-doped all-inorganic perovskite QDs may boost the future research and practical applications of QDs-based white LED,spintronics,and molecular barcoding. 关 键 词：gram-scale enhanced dual-color EMISSION all-inorganic perovskite quantum dots invisible ink polymer composites
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