Surface modification toward luminescent and stable silica-coated quantum dots color filter  

通过表面钝化实现稳定发光的硅包覆量子点滤色片（英文）

作　　者：Bingxin Zhao Xiaoli Zhang Xue Bai Hongcheng Yang Shang Li Junjie Hao Haochen Liu Rui Lu Bing Xu Liduo Wang Kai Wang Xiao Wei Sun 赵冰心;张晓利;白雪;杨鸿成;李尚;郝俊杰;刘皓宸;卢睿;徐冰;王立铎;王恺;孙小卫(Guangdong University Key Lab for Advanced Quantum Dot Displays and Lighting,Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting,Department of Electrical&Electronic Engineering,Southern University of Science and Technology,Shenzhen 518055,China;Department of Chemistry,Tsinghua University,Beijing 100084,China;Shenzhen Planck Innovation Technologies Pte.Ltd.,Shenzhen 518112,China)

机构地区：[1]Guangdong University Key Lab for Advanced Quantum Dot Displays and Lighting,Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting,Department of Electrical&Electronic Engineering,Southern University of Science and Technology,Shenzhen 518055,China [2]Department of Chemistry,Tsinghua University,Beijing 100084,China [3]Shenzhen Planck Innovation Technologies Pte.Ltd.,Shenzhen 518112,China

出　　处：《Science China Materials》2019年第10期1463-1469,共7页中国科学（材料科学（英文版）

基　　金：supported by the National Key Research and Development Program of China administrated by the Ministry of Science and Technology of China(2016YFB0401702);the National Natural Science Foundation of China(61674074,61704072 and61405089);Shenzhen Innovation Project(JCYJ20160301113537474);Shenzhen Basic Research Project(JCYJ20170817112012493);Development and Reform Commission of Shenzhen Project([2017]1395);Shenzhen Peacock Team Project(KQTD2016030111203005);Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting(ZDSYS201707281632549);Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting(2017KSYS007);Distinguished Young Scholar of National Natural Science Foundation of Guangdong(2017B030306010);Tianjin Zhonghuan Quantum Tech Co.,Ltd.(18YFZCGX00580);the start-up fund from Southern University of Science and Technology;supported by the Pico Center at SUSTech that received support from Presidential fund;Development and Reform Commission of Shenzhen Municipality;China Postdoctoral Science Foundation Grant(2018M631443)

摘　　要：A highly pixelated and luminescent silica-coated quantum dot color filter(QDCF)was achieved by surface conjugation with epoxy functional group.Epoxy-functionalized silica-coated quantum dots(QDs)can be thoroughly mixed with SU-8 photoresist up to 25 wt.%without aggregation.The quantum yield(QY)of the silica-coated QDCF can be significantly improved from 19.3%to 36.5%after epoxy treatment.The pristine QDCF experienced a 40%QY decrease,while the epoxied silica-coated QDCF maintained its luminescence even after irradiation(300 mW cm 2@450 nm)for over 25 days.The well-controlled epoxy cap plays a critical role in attaining the ideal optical properties of the QDCF.通过表面连接环氧基团得到高亮度像素化的二氧化硅包覆量子点滤色片(QDCF).环氧基功能化的二氧化硅包覆量子点可以与SU-8光刻胶均匀混合,且混合比例高达25%.经环氧基处理之后,二氧化硅包锻QDCF的量子产率(QY)从19.3%提高到36.5%.合成的QDs经过25天的光照辐射(300 mW cm^-2@450 nm),QY较初始值降低了65%,而环氧基二氧化硅包覆的QDCF没有明显衰减,说明环氧基调控对QDCF的光学性能起到了关键作用.

关 键 词：quantum dot silica coating color filter ligand exchange 

分 类 号：O62[理学—有机化学]