Photon-conversion and sensitization evaluation of Eu3+ in a borate glass system

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)1444-1452
Journal / PublicationApplied Optics
Volume55
Issue number6
Publication statusPublished - 20 Feb 2016

Abstract

Photon conversion is exhibited in a borate (LKZBSB) glass system containing Eu3+, and the enhanced characteristic emissions of Eu3+ with the codoping of Ce3+ have been verified. A large Judd-Ofelt intensity parameter ω2 of Eu3+ indicates a high asymmetrical and strong covalent environment around rare-earth (RE) ions in LKZBSB glasses and spontaneous emission probability and a maximum emission cross section of the dominant 5D07F2 transition were derived to be 370 s-1 and 1.28 × 10-21 cm2, respectively, revealing the potential UV → visible photon-conversion capacity of Eu3+. Absolutely quantitative evaluation illustrates that Eu3+ is a favorable photonconversion center to achieve high photon-conversion efficiency. The addition of Ce3+ is beneficial to realizing effective red emission of Eu3+, which possesses commercial value by decreasing the dopant of expensive europium compounds. As an expectation, this photon-conversion LKZBSB glass system can promote the development of a photon downconversion layer for solar cells, which are particularly used in outer space with intense UV radiation.