Energy transfer in Cr and Nd co-doped Si-B-Na-Al-Ca-Zr-O glasses

Hughes, MA ORCID: https://orcid.org/0000-0002-0877-5279, Li, H, Curry, RJ, Suzuki, T and Ohishi, Y 2020, 'Energy transfer in Cr and Nd co-doped Si-B-Na-Al-Ca-Zr-O glasses' , Journal of Non-Crystalline Solids, 530 .

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Abstract

Cr and Nd co-doped glasses are potential gain media for solar pumped lasers (SPLs). Tanabe-Sugano analysis shows that Cr doped Si-B-Na-Al-Ca-Zr-O (SBNACZ) glass contains a mixture of Cr3+ with octahedral coordination and Cr6+with unknown coordination. The crystal field parameters for Cr3+ were Dq = 1574 cm−1 , B = 792.2 cm−1 , C = 3005 cm−1 and Dq/B = 1.99, indicating a low covalency of Cr-O bonds. We compared the quantum efficiency (QE) of Nd and Cr co-doped SBNACZ glass with Nd doped SBNACZ glass to determine the Cr3+→Nd3+ transfer QE. The Cr2O3 content was fixed at 0.1 mol.% and the Nd2O3 content was varied between 0.1 and 1 mol.%. A maximum transfer QE of 20% was obtained at 0.5 mol.% Nd2O3. Cr3+→Nd3+ energy transfer is dominated by the coulombic interaction mechanism. The clustering of Nd3+ was a limiting factor for increasing the transfer QE with higher Nd3+ concentrations.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Journal of Non-Crystalline Solids
Publisher: Elsevier
ISSN: 0022-3093
Related URLs:
Depositing User: Dr Mark Hughes
Date Deposited: 06 Jan 2020 12:04
Last Modified: 06 Jan 2020 12:15
URI: http://usir.salford.ac.uk/id/eprint/56133

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