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Published on: December 5, 2025
On the analogy between photoluminescence and carrier-type reversal in Bi- and Pb-doped glasses
Mark A Hughes1, Russell M Gwilliam, Kevin Homewood
1Advanced Technology Institute, Department of Electronic Engineering, University of Surrey, Guildford, GU2 7XH, UK. m.a.hughes@surrey.ac.uk
Abstract:
Reaction order in Bi-doped oxide glasses depends on the optical basicity of the glass host. Red and NIR photoluminescence (PL) bands result from Bi(2+) and Bin clusters, respectively. Very similar centers are present in Bi- and Pb-doped oxide and chalcogenide glasses. Bi-implanted and Bi melt-doped chalcogenide glasses display new PL bands, indicating that new Bi centers are formed. Bi-related PL bands have been observed in glasses with very similar compositions to those in which carrier-type reversal has been observed, indicating that these phenomena are related to the same Bi centers, which we suggest are interstitial Bi(2+) and Bi clusters.
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