Boosting single-band red upconversion luminescence in colloidal NaErF4 nanocrystals:Effects of doping and inert shell
来源期刊：JOURNAL OF RARE EARTHS2019年第6期
论文作者：Xiangshui Cui Yao Cheng Hang Lin Qingping Wu Ju Xu Yuansheng Wang
文章页码：573 - 579
摘 要：Single-band red upconversion luminescence（UCL） is vital to in vivo bioimaging as well as "see and treat" biomedicines. Herein, starting with the previously reported β-NaErF4:Tm UCNPs, we examined the effects of both Yb3+ doping and inert shell coating on the red-to-green（R/G） ratio for Er3+ based UCL. The doping of Yb3+ into the β-NaErF4:Tm3+ core not only enhances the whole UCL intensity, but also raises the R/G ratio by 1.25 times. In addition, the coating of an inert NaYF4 shell, which is usually adopted for the enhancement of UCL intensity, further boosts the R/G value up to as high as 77.92. This work may benefit the potential bioimaging application of single-band red UCL.
Xiangshui Cui，Yao Cheng，Hang Lin，Qingping Wu，Ju Xu，Yuansheng Wang
CAS Key Laboratory of Design and Assembly of Functional Nanostructures,and Fujian Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences
摘 要：Single-band red upconversion luminescence（UCL） is vital to in vivo bioimaging as well as "see and treat" biomedicines. Herein, starting with the previously reported β-NaErF4:Tm UCNPs, we examined the effects of both Yb3+ doping and inert shell coating on the red-to-green（R/G） ratio for Er3+ based UCL. The doping of Yb3+ into the β-NaErF4:Tm3+ core not only enhances the whole UCL intensity, but also raises the R/G ratio by 1.25 times. In addition, the coating of an inert NaYF4 shell, which is usually adopted for the enhancement of UCL intensity, further boosts the R/G value up to as high as 77.92. This work may benefit the potential bioimaging application of single-band red UCL.
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