Premium
Full‐Color Phosphors from Europium( III )‐Based Organosilicates
Author(s) -
Carlos L. D.,
Messaddeq Y.,
Brito H. F.,
Sá Ferreira R. A.,
de Zea Bermudez V.,
Ribeiro S. J. L.
Publication year - 2000
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(200004)12:8<594::aid-adma594>3.0.co;2-s
Subject(s) - europium , phosphor , materials science , excitation wavelength , wavelength , excitation , emission intensity , white light , optics , analytical chemistry (journal) , photochemistry , luminescence , optoelectronics , organic chemistry , chemistry , physics , quantum mechanics
Room‐temperature white light emission can be obtained from a family of europium‐containing hybrid materials called di‐ureasils—organically modified silicates in which oxyethylene chains of different length are grafted by means of urea crosslinks to the siliceous backbone. It is demonstrated that the emission color may be tuned by either adjusting the amount of europium salt incorporated or by varying the excitation wavelength. The Judd–Ofelt intensity parameters are obtained and considered together with the decay rates and an interpretation of the physical meaning of the observed behavior is offered.