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Energy structure and fluorescence of Eu2+ in ZnS:Eu nanoparticles
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- Chen, Wei (author)
- University of Western Ontario,Lund University
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- Malm, Jan-Olle (author)
- Lund University,Lunds universitet,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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- Zwiller, Valéry (author)
- Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- (creator_code:org_t)
- 2000
- 2000
- English 4 s.
- In: Physical Review B. - 1098-0121. ; 61:16, s. 11021-11024
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Eu2+-doped ZnS nanoparticles with an average size of around 3 nm were prepared, and an emission band around 530 nm was observed. By heating in air at 150 degrees C, this emission decreased, while the typical sharp line emission of Eu3+ increased. This suggests that the emission around 530 nm is from intraion transition of Eu2+: In bulk ZnS:Eu2+, no intraion transition of Eu2+ was observed because the excited states of Eu2+ are degenerate with the continuum of the ZnS conduction band. We show that the band gap in ZnS:Eu2+ nanoparticles opens up due to quantum confinement, such that the conduction band of ZnS is higher than the first excited state of Eu2+, thus enabling the intraion transition of Eu2+ to occur.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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- ref (subject category)
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- Chen, Wei
- Malm, Jan-Olle
- Zwiller, Valéry
- Huang, Yining
- Liu, Shuman
- Wallenberg, Rein ...
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- Bovin, Jan-Olov
- Samuelson, Lars
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- NATURAL SCIENCES
- NATURAL SCIENCES
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