Concentration quenching of Eu2+ doped Ca2BO3Cl
2016 (English)In: Materials research bulletin, ISSN 0025-5408, E-ISSN 1873-4227, Vol. 75, 47-50 p.Article in journal (Refereed) PublishedText
With the aim of determining the concentration quenching mechanism of Eu2+ doped Ca2BO3Cl, a series of phosphors with a varied Eu2+ concentration (Ca2-xBO3Cl:xEu(2+)) was synthesized by the solid state reaction method. The phase structure was determined by X-ray diffraction. Photoluminescence (PL) measurements showed broad excitation and emission signatures of the allowed f-d transition of Eu2+ ions. The PL emission intensity was found to be increased by increasing the concentration of Eu2+ ions up to x=0.03 and then decreased as a result of the concentration quenching effect. The lifetime of the emission from the Eu2+ ions was measured and the decrease in the lifetime with increasing Eu2+ concentration confirmed that non-radiative energy transfer occurred between Eu2+ ions. From the luminescence data, the value of the critical transfer distance was calculated as 1.5 nm and the corresponding concentration quenching mechanism was verified to be a dipole-dipole interaction. (C) 2015 Elsevier Ltd. All rights reserved.
Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2016. Vol. 75, 47-50 p.
Optical materials; X-ray diffraction; Luminescence; Optical properties; Phosphors
IdentifiersURN: urn:nbn:se:liu:diva-124619DOI: 10.1016/j.materresbull.2015.11.024ISI: 000368220300008OAI: oai:DiVA.org:liu-124619DiVA: diva2:901815
Funding Agencies|South African Research Chairs Initiative of the Department of Science and Technology; National Research Foundation of South Africa; University of the Free State2016-02-092016-02-082016-02-09