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Carbon Dots-in-Zeolite via In-Situ Solvent-Free Thermal Crystallization:Achieving High-Efficiency and Ultralong Afterglow Dual Emission

查看全文 作　　者：Hongyue [1,2]Zhang;Kaikai [1]Liu;Jiancong [1]Liu;Bolun [1]Wang;Chengyu [3]Li;Wei [4]Song;Jiyang [1]Li;Ling [5]Huang;Jihong [1,2]Yu 高影响力作者 机构地区：[1]State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012;[2]International Center of Future Science,Jilin University,Changchun 130012;[3]State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022;[4]State Key Laboratory of Supramolecular Structure and Materials,Jilin University,Changchun 130012;[5]Institute of Advanced Materials(IAM),Nanjing Tech University,Nanjing 211816高影响力机构 出　　处：《CCS Chemistry》索引2020年第2卷第3期,共10页高影响力期刊 基　　金：Foundation of China(grant nos.21621001,21920102005,21835002,and 21671075);the 111 Project of China(B17020);the financial supports. 摘　　要：Organic afterglow materials are highly desirable for optoelectronic applications,but they usually suffer from complex preparation process,low quantum efficiency,and short lifetime due to the ultrafast deactivation of the highly active excited states involved.Here,we succeeded in achieving solventfree thermal syntheses of high-efficiency afterglow CDs@zeolite composite materials by simply grinding the solid raw materials of zeolite and precursor CDs at room temperature,followed by thermal crystallization.This method afforded maximum embedding of CDs into growing zeolite crystals,as well as strong host–guest interaction to surpass the nonradiative transition of CDs,thus producing composite materials with ultralong dual emission of thermally activated delayed fluorescence and room temperature phosphorescence with a record high lifetime of 1.7 and 2.1 s,respectively,and the quantum yield of 90.7%.Furthermore,in a preliminary experiment,we applied the composite materials in alternatingcurrent light-emitting diode supplementary lighting,which exhibited a promising potential in optoelectronic applications. 关 键 词：carbon dots ZEOLITE thermally activated delayed fluorescence(TADF) room temperature phosphorescence(RTP) alternating-current light-emitting diode(AC LED)
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