荔枝壳掺氮源合成用于LED下转换的碳量子点  

Nitrogen-doped carbon dots synthesized from lychee exocarp for LED down-conversion applications

作　　者：李安宇 巩婧伟 张齐艳 黄双武 LI Anyu;GONG Jingwei;ZHANG Qiyan;HUANG Shuangwu(College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,Guangdong Province,P.R.China;Department of Electronics and Information Engineering,Shenzhen University,Shenzhen 518060,Guangdong Province,P.R.China;Institute of Microelectronics,Shenzhen University,Shenzhen 518060,Guangdong Province,P.R.China;Guangdong Research Center for Interfacial Engineering of Functional Materials,Shenzhen University,Shenzhen 518060,Guangdong Province,P.R.China;State Key Laboratory of Radio Frequency Heterogeneous Integration,Shenzhen University,Shenzhen 518060,Guangdong Province,P.R.China)

机构地区：[1]深圳大学材料学院,广东深圳518060 [2]深圳大学电子与信息工程学院,广东深圳518060 [3]深圳大学微电子研究所,广东深圳518060 [4]深圳大学广东省功能材料界面工程研究中心,广东深圳518060 [5]深圳大学射频异质异构集成全国重点实验室,广东深圳518060

出　　处：《深圳大学学报(理工版)》2025年第2期146-153,I0003,共9页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(52203096);深圳市科技计划资助项目(RCBS20221008093110036,ZDSYS20220527171402005)。

摘　　要：碳量子点(carbon dots,CDs)常用作发光二极管(light-emitting diode,LED)显示屏的颜色转换材料,然而由于CDs对水、氧气和化学试剂的耐受性低,在LED下转换涂层中的应用常受到限制.以荔枝壳为碳源,采用水热合成法制备CDs,并通过添加尿素、氨水和三聚氰胺掺杂氮元素,以调节CDs的发光颜色.使用水溶性聚乙烯醇(polyvinyl alcohol,PVA)作为CDs的固相分散基质,获得具有良好荧光性和生物相容性的CDs-PVA薄膜.通过透射电子显微镜、荧光光谱等方法对CDs的形貌、结构和物理化学性质进行研究.结果表明,制备出的CDs在紫外光激发下产生了多色荧光,表现出优异的光稳定性,并具有较高的绝对量子产率,最高可达7.20%.研究结果可为LED下转换提供潜在的应用价值.Carbon dots(CDs)materials are commonly used as color conversion materials for light-emitting diode(LED)display.However,their poor resistance to water,oxygen and chemical reagents limits their applications in LED down-conversion coatings.To facilitate further processing and enhance their application,it is essential to encapsulate CDs with a solid substrate to preserve the original optical properties of CDs.In this study,lychee exocarp was used as the carbon source to prepare CDs via a solvothermal method.The as-synthesized CDs were deliberately doped with various nitrogen sources,including urea,ammonia and melamine(MA),to regulate the color emission behavior of CDs.Additionally,a widely-used water-soluble polyvinyl alcohol(PVA)was applied serving as the solid phase dispersion matrix for the CDs,resulting in CDs/PVA films with excellent fluorescence and biocompatibility.The morphological,structural,and physicochemical properties of the nitrogen-doped CDs were systematically investigated using transmission electron microscopy(TEM),fluorescence(FL)spectrum,and other methods.The synthesized CDs exhibit multi-color fluorescence upon UV excitationand demonstrate outstanding photostability.The absolute quantum yield of the CDs is relatively high,reaching up to 7.20%.This research results suggest that the synthesized CDs have potential applications in LED down-conversion.

关 键 词：荧光材料 氮掺杂碳量子点 LED下转换 荔枝壳 聚乙烯醇 量子产率 水热合成法 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ127.11[化学工程—无机化工]