太原理工大学学报2018，Vol.49Issue(1)：15-20,6.DOI:10.16355/j.cnki.issn1007-9432tyut.2018.01.003
乙腈溶剂热法合成白光LED用碳量子点荧光材料
Synthesis of Fluorescent Carbon Quantum Dots Towards White Light-emitting Diodes Using Acetonitrile as Solvent
摘要
Abstract
Carbon quantum dots (CQDs) with fluorescent quantum yield of 48.10％ were syn thesized by solvothermal treatment using citric acid,urea and acetonitrile as carbon source,nitrogen dopant and solvent,respectively.CQDs have the average diameter of 1～3 nm and good dispersability in solvent.The as-prepared CQD acetonitrile solution,with average fluorescent lifetime of 10.99 ns and red-green-blue spectral composition ratio of 56.09％,exhibits bright blue fluorescence and shows an excitation wavelength-dependent behavior.White light-emitting diodes (LED) based on the CQD phosphors by using polyvinyl alcohol as encapsulating material are achieved with color coordinates of (0.33,0.42) and correlated color temperature of 5 502 K,respectively,which demonstrates these CQDs have potential of application in the field of white LED.关键词
溶剂热/乙腈/碳量子点(CQDs)/白光LED/荧光材料/聚乙烯醇Key words
solvothermal/acetonitrile/carbon quantum dots(CQDs)/white LED/fluorescent material/polyvinyl alcohol(PVA)分类
通用工业技术引用本文复制引用
郑静霞,杨永珍,刘旭光,许并社..乙腈溶剂热法合成白光LED用碳量子点荧光材料[J].太原理工大学学报,2018,49(1):15-20,6.基金项目
国家自然科学基金资助项目(U1610255,U1607120) （U1610255,U1607120）
山西省科技创新重点团队(2015013002-10,201605D131045-10) （2015013002-10,201605D131045-10）
山西省重点研发计划(201603D111010) （201603D111010）
