Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 300, Issue -, Pages 421-425Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-8388(99)00755-0
Keywords
quantum cutting; vaccum ultraviolet; phosphors; energy transfer
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To obtain Vacuum ultraviolet (VUV) phosphors with quantum efficiencies higher than 100%, the concept of downconversion is used. In a downconversion process a VUV photon is split into two visible photons by making use of energy transfer between different rare earth ions. Two examples of downconversion couples are discussed, viz. the Gd3+-EU3+ couple and the Er3+-Gd3+-Tb3+ system. (C) 2000 Elsevier Science S.A. All rights reserved.
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