深圳大学学报（理工版）2025，Vol.42Issue(2)：146-153,8.DOI:10.3724/SP.J.1249.2025.02146
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
摘要
Abstract
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Key words
fluorescent material/nitrogen doped carbon dots/LED down-conversion/lychee exocarp/polyvinyl alcohol/quantum yield/solvothermal method分类
通用工业技术引用本文复制引用
李安宇,巩婧伟,张齐艳,黄双武..荔枝壳掺氮源合成用于LED下转换的碳量子点[J].深圳大学学报（理工版）,2025,42(2):146-153,8.基金项目
National Natural Science Foundation of China(52203096) （52203096）
Shenzhen Science and Technology Program(RCBS20221008093110036,ZDSYS20220527171402005) 国家自然科学基金资助项目(52203096) （RCBS20221008093110036,ZDSYS20220527171402005）
深圳市科技计划资助项目(RCBS20221008093110036,ZDSYS20220527 171402005) （RCBS20221008093110036,ZDSYS20220527 171402005）
