Efficient Er3+:4I11/2 → 4I13/2 radiative transition regulated by optimizing the sensitization mechanism

Lingfeng Zhou; Feifei Huang; Guangyu Ren; Youjie Hua; Ruoshan Lei; Shiqing Xu

doi:10.1016/j.saa.2019.117853

Efficient Er³⁺:⁴I_11/2 → ⁴I_13/2 radiative transition regulated by optimizing the sensitization mechanism

Spectrochim Acta A Mol Biomol Spectrosc. 2020 Mar 5:228:117853. doi: 10.1016/j.saa.2019.117853. Epub 2019 Nov 25.

Authors

Lingfeng Zhou¹, Feifei Huang², Guangyu Ren¹, Youjie Hua¹, Ruoshan Lei¹, Shiqing Xu¹

Affiliations

¹ Institute of Optoelectronic Materials and Devices, China Jiliang University, Hangzhou 310018, China.
² Institute of Optoelectronic Materials and Devices, China Jiliang University, Hangzhou 310018, China. Electronic address: huangfeifei@cjlu.edu.cn.

PMID: 31786049
DOI: 10.1016/j.saa.2019.117853

Abstract

A series of fluorophosphates glass codoped with active Er³⁺ ions and sensitizing ions of different systems were prepared to systematically study their sensitization effect in order to obtain efficient MIR luminescence. Differential scanning calorimetry curve indicates the favorable thermal stability of the glass host. A comprehensive analysis of the sensitization mechanism is given based on the synthesis considering the position and intensity of fluorescence emissions together with the lifetime of Er³⁺:⁴I_13/2 active level. The results show two positive sensitization effects: the eliminating effect to the lower laser level of Er³⁺ active ions represented by Pr³⁺ ions reducing the lifetime of ⁴I_13/2 energy level to a great extent; and improving the absorption efficiency of pumping source sensitized by Yb³⁺ ions. The paper has provided a mental knowledge for sensitization mechanism in rare earth multi-doped materials together with the aiming of promoting the MIR luminescence of Er³⁺ ions.

Keywords: Er(3+) ions; Fluorophosphate glass; Mid-infrared; Sensitization mechanism.