Tuning the micro-structure of germanosilicate glass to control Bi0/Bi+ and promote efficient Ho3+ fluorescence. Issue 29 (6th July 2018)

• Record Type: Journal Article
• Authors: Cao, Wenqian; Wang, Tongwei; Huang, Feifei; Wang, Zheng; Hua, Youjie; Lei, Ruoshan; Xu, Shiqing
• Is Part Of: Dalton transactions. Volume 47:Issue 29(2018)
• Page Start: 9717
• Page End: 9723
• Publication Date: 2018-07-06
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c8dt01908h
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Bi can exist in a variety of chemical states (with varying ionic charges) and the microstructure of the glass surrounding the ions can be engineered to manipulate the chemical state to promote Ho 3+ fluorescence. Abstract : Bi can exist in a variety of chemical states (with varying ionic charges) and the microstructure of the glass surrounding the ions can be engineered to manipulate the chemical state. In this work, efficient enhancement of Ho 3+ emission is observed with the change in local glass environment around Bi by adding Al2 O3 to multi-component germanosilicate glass. In this multi-component glass, Al 3+ can form tetrahedral AlO4 by accepting the non-bridging oxygen (NBO) and then, the addition of the AlO4 -tetrahedron to the glass network facilitates the diffusion of alkali metals. Hence, Al2 O3 decreases the Ba 2+ -rich domain and is conducive to the existence of Bi ions that are at low valence state. Moreover, the emission spectra indicate high efficiency energy transfer (ET) derived from NIR emission centers (Bi 0 /Bi + ) located in close proximity to the Ho 3+ ions. These results indicate that the optimized fluorescence of Ho 3+ for optical fiber laser can be achieved by adjusting the local structure of the host glass.