Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7840123 | Journal of Luminescence | 2018 | 24 Pages |
Abstract
Resonance migration and cross-relaxation processes leading to concentration self-quenching of fluorescence have been studied theoretically and experimentally with Nd3+: LaF3 bulk crystal as an example. The time range of theoretical description of self-quenching kinetics has been expanded by including into consideration the long-range fluctuation stage that determines the slow luminescence quenching of donor centers isolated due to fluctuations of donor surroundings. New experimental data on fluorescence kinetics concentration dependence in a Nd3+:LaF3 bulk crystal are consistently described with single set of energy migration CDD and cross-relaxation CDA microparameters. The obtained results is the first step to solve the problem of quenching in RE doped nanocrystals where, along with self-quenching, the quenching by additional acceptors namely, various molecular groups, residing in the volume of the nanoparticles have to be accounted.
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Authors
S.G. Fedorenko, A.V. Popov, E.A. Vagapova, A.E. Baranchikov, Yu.V. Orlovskii,