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Synthesis and up-conversion emissions of $$\hbox {Yb}^{3+}{/}\hbox {Er}^{3+}$$ Yb 3 + / Er 3 + , $$\hbox {Yb}^{3+}{/}\hbox {Tm}^{3+}$$ Yb 3 + / Tm 3 + and $$\hbox {Yb}^{3+}{/}\hbox {Tm}^{3+}{/}\hbox {Gd}^{3+}$$ Yb 3 + / Tm 3 + / Gd 3 + co-doped $$\hbox {KLu}_{2}\hbox {F}_{7}$$ KLu 2 F 7

Crossref DOI link: https://doi.org/10.1007/s12034-017-1483-0

Published Online: 2017-09-23

Published Print: 2017-10

Update policy: https://doi.org/10.1007/springer_crossmark_policy