Eu3+ doped yttrium oxysulfide quantum structures—structural, optical and electronic properties
Small particles of trivalent europium doped yttrium oxysulfide nanocrystals (ϕ ∼ 7 nm) were synthesized using sol–gel polymer thermolysis. The nanocrystals show significant change in the excitation bands corresponding to fundamental absorption and charge transfer absorption bands. The optical spectr...
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| Veröffentlicht in: | Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2008-03, Vol.10 (3), p.455-463 |
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| container_title | Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology |
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| creator | Thirumalai, J. Chandramohan, R. Sekar, M. Rajachandrasekar, R. |
| description | Small particles of trivalent europium doped yttrium oxysulfide nanocrystals (ϕ ∼ 7 nm) were synthesized using sol–gel polymer thermolysis. The nanocrystals show significant change in the excitation bands corresponding to fundamental absorption and charge transfer absorption bands. The optical spectra essentially comprise of two parts: fundamental absorption (∼260 nm) and Eu
3+
–X
2−
ligand (O
2−
/S
2−
) charge transfer (∼290 nm) bands. They show significant blue shifts (0.24–0.30 eV), respectively, with respect to the bulk counterpart. These may be explained by considering possible size dependent changes associated with quantum confinement effect in this large bandgap semiconductor system. FT-IR spectra revealed the difference in chemisorbed species between bulk and nanocrystalline samples. The results of the solid-state photo-induced electrical impedance spectroscopy studies are reported. |
| doi_str_mv | 10.1007/s11051-007-9276-9 |
| format | Article |
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3+
–X
2−
ligand (O
2−
/S
2−
) charge transfer (∼290 nm) bands. They show significant blue shifts (0.24–0.30 eV), respectively, with respect to the bulk counterpart. These may be explained by considering possible size dependent changes associated with quantum confinement effect in this large bandgap semiconductor system. FT-IR spectra revealed the difference in chemisorbed species between bulk and nanocrystalline samples. The results of the solid-state photo-induced electrical impedance spectroscopy studies are reported.</description><identifier>ISSN: 1388-0764</identifier><identifier>EISSN: 1572-896X</identifier><identifier>DOI: 10.1007/s11051-007-9276-9</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Absorption ; Analytical chemistry ; Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Europium ; Inorganic Chemistry ; Lasers ; Materials Science ; Nanoparticles ; Nanotechnology ; Optical Devices ; Optics ; Photonics ; Physical Chemistry ; Polymers ; Research Paper ; Spectrum analysis ; Yttrium</subject><ispartof>Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 2008-03, Vol.10 (3), p.455-463</ispartof><rights>Springer Science+Business Media B.V. 2007</rights><rights>Springer Science+Business Media B.V. 2008</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c246t-ecd3700aa25b5f2fd6011e1c666522ae4a3c640505cf721aa029bcb659eabb643</citedby><cites>FETCH-LOGICAL-c246t-ecd3700aa25b5f2fd6011e1c666522ae4a3c640505cf721aa029bcb659eabb643</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11051-007-9276-9$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11051-007-9276-9$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27923,27924,41487,42556,51318</link.rule.ids></links><search><creatorcontrib>Thirumalai, J.</creatorcontrib><creatorcontrib>Chandramohan, R.</creatorcontrib><creatorcontrib>Sekar, M.</creatorcontrib><creatorcontrib>Rajachandrasekar, R.</creatorcontrib><title>Eu3+ doped yttrium oxysulfide quantum structures—structural, optical and electronic properties</title><title>Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology</title><addtitle>J Nanopart Res</addtitle><description>Small particles of trivalent europium doped yttrium oxysulfide nanocrystals (ϕ ∼ 7 nm) were synthesized using sol–gel polymer thermolysis. The nanocrystals show significant change in the excitation bands corresponding to fundamental absorption and charge transfer absorption bands. The optical spectra essentially comprise of two parts: fundamental absorption (∼260 nm) and Eu
3+
–X
2−
ligand (O
2−
/S
2−
) charge transfer (∼290 nm) bands. They show significant blue shifts (0.24–0.30 eV), respectively, with respect to the bulk counterpart. These may be explained by considering possible size dependent changes associated with quantum confinement effect in this large bandgap semiconductor system. FT-IR spectra revealed the difference in chemisorbed species between bulk and nanocrystalline samples. The results of the solid-state photo-induced electrical impedance spectroscopy studies are reported.</description><subject>Absorption</subject><subject>Analytical chemistry</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemistry and Materials Science</subject><subject>Europium</subject><subject>Inorganic Chemistry</subject><subject>Lasers</subject><subject>Materials Science</subject><subject>Nanoparticles</subject><subject>Nanotechnology</subject><subject>Optical Devices</subject><subject>Optics</subject><subject>Photonics</subject><subject>Physical Chemistry</subject><subject>Polymers</subject><subject>Research Paper</subject><subject>Spectrum 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doped yttrium oxysulfide quantum structures—structural, optical and electronic properties</title><author>Thirumalai, J. ; Chandramohan, R. ; Sekar, M. ; Rajachandrasekar, R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c246t-ecd3700aa25b5f2fd6011e1c666522ae4a3c640505cf721aa029bcb659eabb643</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Absorption</topic><topic>Analytical chemistry</topic><topic>Characterization and Evaluation of Materials</topic><topic>Chemistry and Materials Science</topic><topic>Europium</topic><topic>Inorganic Chemistry</topic><topic>Lasers</topic><topic>Materials Science</topic><topic>Nanoparticles</topic><topic>Nanotechnology</topic><topic>Optical Devices</topic><topic>Optics</topic><topic>Photonics</topic><topic>Physical Chemistry</topic><topic>Polymers</topic><topic>Research Paper</topic><topic>Spectrum 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interdisciplinary forum for nanoscale science and technology</jtitle><stitle>J Nanopart Res</stitle><date>2008-03-01</date><risdate>2008</risdate><volume>10</volume><issue>3</issue><spage>455</spage><epage>463</epage><pages>455-463</pages><issn>1388-0764</issn><eissn>1572-896X</eissn><abstract>Small particles of trivalent europium doped yttrium oxysulfide nanocrystals (ϕ ∼ 7 nm) were synthesized using sol–gel polymer thermolysis. The nanocrystals show significant change in the excitation bands corresponding to fundamental absorption and charge transfer absorption bands. The optical spectra essentially comprise of two parts: fundamental absorption (∼260 nm) and Eu
3+
–X
2−
ligand (O
2−
/S
2−
) charge transfer (∼290 nm) bands. They show significant blue shifts (0.24–0.30 eV), respectively, with respect to the bulk counterpart. These may be explained by considering possible size dependent changes associated with quantum confinement effect in this large bandgap semiconductor system. FT-IR spectra revealed the difference in chemisorbed species between bulk and nanocrystalline samples. The results of the solid-state photo-induced electrical impedance spectroscopy studies are reported.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s11051-007-9276-9</doi><tpages>9</tpages></addata></record> |
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| subjects | Absorption Analytical chemistry Characterization and Evaluation of Materials Chemistry and Materials Science Europium Inorganic Chemistry Lasers Materials Science Nanoparticles Nanotechnology Optical Devices Optics Photonics Physical Chemistry Polymers Research Paper Spectrum analysis Yttrium |
| title | Eu3+ doped yttrium oxysulfide quantum structures—structural, optical and electronic properties |
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