中国光学2021，Vol.14Issue(2)：418-430,13.DOI:10.37188/CO.2020-0097
钕敏化多层壳纳米结构的增强型染料敏化上转换发光
Enhanced dye-sensitized up-conversion luminescence of neodymium-sensitized multi-shell nanostructures
摘要
Abstract
Lanthanide-ion-doped upconversion luminescence is limited by the small absorption cross-section and narrow absorption band of lanthanide ions, which results in weak luminescence. Recently, a dye-sensit-ized method has proven to be an effective strategy of increasing upconversion luminescence. However, simply attaching dye molecules to nanoparticles with classic Yb-doped nanostructures cannot effectively ac-tivate the sensitizing ability of the dye molecules. In response to this problem, we designed Nd-sensitized core/shell/shell (NaYF4:Yb/Er (20/2％)@ NaYF4:Yb (10 ％)@ NaYF4:Nd (80 ％)) nanostructures, compared with the classic IR-806 sensitized NaYF4:Yb/Er nanostructure, their upconversion luminescence (500 to 700 nm) was approximately enhanced by a factor of 38. Through analysis of the nanostructure's emission and luminescence lifetime data, the enhancement was confirmed by the effective overlap of Nd absorption with the emission of near-infrared dye molecules and the protective effects of the shell structure on the lumines-cent center (the lifetime of Er (4S3/2→4I15/2) was increased by 1.7 times). In addition, we found that the dop-ing Yb3+ in the outermost layer will decrease the dye-sensitized luminescence intensity. Furthermore, this Nd-sensitized core/shell/shell structure also achieved enhancement in the sensitized upconversion luminescence of the luminescence centers of Ho and Tm, which establishes a foundation for enhanced dye-sensitized up-conversion luminescence.关键词
上转换发光/稀土离子/染料敏化/纳米粒子Key words
upconversion luminescence/dye-sensitized/lanthanide ion/nanoparticles分类
信息技术与安全科学引用本文复制引用
王丹,薛彬,涂浪平,张友林,宋军,屈军乐,孔祥贵..钕敏化多层壳纳米结构的增强型染料敏化上转换发光[J].中国光学,2021,14(2):418-430,13.基金项目
国家重点基础研究发展计划(No. 2018YFC0910602) （No. 2018YFC0910602）
国家自然科学基金项目(No. 61605130,No.11604331,No. 61775145,No. 61835009) （No. 61605130,No.11604331,No. 61775145,No. 61835009）
吉林省科技厅自然科学基金项目(No. 20180101222JC) （No. 20180101222JC）
深圳市基础研究项目(No. JCYJ20180305125425815)Supported by National Key R&D Program of China (No. 2018YFC0910602) （No. JCYJ20180305125425815）
National Natural Science Found-ation of China (No. 61605130, No. 11604331, No. 61775145, No. 61835009) （No. 61605130, No. 11604331, No. 61775145, No. 61835009）
Project of Science and Technology Agency, Jilin Province (No. 20180101222JC) （No. 20180101222JC）
Shenzhen Basic Research Project (No. JCYJ20180305125425815) （No. JCYJ20180305125425815）
