Figure |Modelling the internal OH- induced luminescence quenching in upconversion nanoparticles. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure |Modelling the internal OH- induced luminescence quenching in upconversion nanoparticles.

Caption

a, Schematic diagram of the internal OH- influences on energy migration induced upconversion luminescence, which can be visualized as "survivor effect". Typically, the shorter the migration path of an excited state of Yb3+, the larger the possibility of its surviving from OH- induced quenching. b, Top: Internal OH- content dependent upconversion luminescence intensity of NaYF4-x(OH)x:Yb/Er@NaYF4 nanoparticles. Green dots are the experimental values and the curve is the calculated result; Bottom: Comparison of experimental (circle) and simulation (triangle) results for the Yb3+ decay lifetimes (black color) and upconversion luminescence intensities (red color) of NaYF4-x(OH)x:Yb/Er@NaYF4 core/shell nanoparticles.

Credit

by Yansong Feng, Zhi Li, Qiqing Li, Jun Yuan, Langping Tu, Lixin Ning and Hong Zhang

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