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New concepts for VUV phosphors with high quantum efficiency ( q > 100%)
Author(s) -
Donker H.,
Wegh R. T.,
Meijerink A.,
Krupa J. C.,
Queffelec M.
Publication year - 1998
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1985209
Subject(s) - phosphor , quantum efficiency , quantum , excitation , optoelectronics , materials science , relaxation (psychology) , process (computing) , optics , physics , computer science , quantum mechanics , psychology , social psychology , operating system
— The first overview of the 4 f levels of Gd 3+ 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 LiGdF 4 : Eu 3+ 0.5 mol% upon excitation in the VUV is shown to be 195%.