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New concepts for VUV phosphors with high quantum efficiency (q > 100%)

descriptionPublicationkeyboard_double_arrow_right Article 01 Mar 1998 English Publisher:WileyJournal:Journal of the Society for Information Display, volume 6, pages 73-76 (issn: 1071-0922, eissn: 1938-3657,

Authors: J. C. Krupa; René Theodorus Wegh; H. Donker; Andries Meijerink; M. Queffelec;

doi: 10.1889/1.1985209

New concepts for VUV phosphors with high quantum efficiency (q > 100%)

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Abstract

Abstract— The first overview of the 4f levels of Gd3+ in the VUV is reported. It is shown that quantum cutting is a very promising phenomenon to make VUV phosphors with a quantum efficiency greater than 100% and that the efficiency of this process can be improved by cross‐relaxation. The visible quantum efficiency of LiGdF4: Eu3+ 0.5 mol% upon excitation in the VUV is shown to be 195%.

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Utrecht University
Netherlands

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