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Concentration quenc...
Concentration quenching of Eu2+ doped Ca2BO3Cl
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- Seed Ahmed, H. A. A. (författare)
- University of Orange Free State, South Africa; University of Khartoum, Sudan
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- Swart, H. C. (författare)
- University of Orange Free State, South Africa
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- Bergman, Peder (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Kroon, R. E. (författare)
- University of Orange Free State, South Africa
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(creator_code:org_t)
- PERGAMON-ELSEVIER SCIENCE LTD, 2016
- 2016
- Engelska.
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Ingår i: Materials research bulletin. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0025-5408 .- 1873-4227. ; 75, s. 47-50
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- Optical materials; X-ray diffraction; Luminescence; Optical properties; Phosphors
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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