发光学报2020，Vol.41Issue(9)：1102-1113,12.DOI:10.37188/fgxb20204109.1102
NaYF4:Yb3+,Ln3+@NaYF4:Yb3+@NaYF4(Ln=Ho,Tm)核-双层壳纳米晶中Yb3+调控的高效上转换发光
Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb3+ in Core-shell-shell Structured NaYF4:Yb3+, Ln3+@NaYF4:Yb3+@NaYF4( Ln=Ho, Tm) Nanocrystals
摘要
Abstract
In this research, the Yb3+/Ln3+(Ln=Ho3+ and Tm3+) dopedβ-NaYF4 core nanocrystals(NCs) with sub-10 nm size were synthesized with co-precipitation method, based on which the core-shell-shell structured NaYF4:Yb3+,Ln3+@NaYF4:Yb3+@NaYF4 NCs were constructed. The successfully growth of the middle active-shell and the outmost inert-shell were proved by XRD and TEM measurements. The spectral results indicated that partially isolate Yb3+dopant in active-core and active-shell and the growth of the outmost inert-shell can effectively improve the upconver-sion(UC) emission intensity of Ho3+ and Tm3+, which is resulted from the enhanced absorption of 980 nm excitation light and energy transfer efficiency ascribing to the increased Yb3+ concentration quenching threshold. Moreover, through adjusting Yb3+ doping concentration in the middle-shell, the tunable emission can be obtained. This research suggested a general route for the development of highly-efficient luminescent upconversion nanocrystals( UCNCs) in a broad color range.关键词
上转换发光/核-双层壳结构/β-NaYF4Key words
upconversion/core-shell-shell structure/β-NaYF4分类
数理科学引用本文复制引用
廖华珍,肖萍,叶松,王德平..NaYF4:Yb3+,Ln3+@NaYF4:Yb3+@NaYF4(Ln=Ho,Tm)核-双层壳纳米晶中Yb3+调控的高效上转换发光[J].发光学报,2020,41(9):1102-1113,12.基金项目
国家自然科学基金(51872200, 51772210) （51872200, 51772210）
上海市自然科学基金(18ZR1441900) （18ZR1441900）
国家重点研发计划(2018YFC1106302)资助项目Supported by National Natural Science Foundation of China(51872200,51772210) （2018YFC1106302）
Natural Science Foundation of Shanghai (18ZR1441900) （18ZR1441900）
National Key Research and Development Program of China(2018YFC1106302) （2018YFC1106302）
