Time-resolved photoluminescence study of stabilised iron–porous silicon nanocomposites
Porous silicon (PS) passivated by iron (PS/Fe) shows an intense, board and stable photoluminescence (PL) band centred at 1.77 eV. The time-resolved photoluminescence (TRPL) of PS and PS/Fe, in the range of some tenth of μs, were investigated at room temperature. Contrary to PS, the TRPL spectrum of...
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| Veröffentlicht in: | Journal of alloys and compounds 2010-09, Vol.506 (2), p.496-499 |
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| container_title | Journal of alloys and compounds |
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| creator | Rahmani, M. Ajlani, H. Moadhen, A. Zaïbi, M.-A. Haji, L. Oueslati, M. |
| description | Porous silicon (PS) passivated by iron (PS/Fe) shows an intense, board and stable photoluminescence (PL) band centred at 1.77
eV. The time-resolved photoluminescence (TRPL) of PS and PS/Fe, in the range of some tenth of μs, were investigated at room temperature. Contrary to PS, the TRPL spectrum of PS/Fe exhibits a multi-band profile, attributed to the presence of iron in porous silicon matrix. Hence, the passivation of PS by iron provides the formation of two states located in the PS band gap. The PL decay line shape, in PS and PS/Fe, is well described by stretched exponential. The decay time (
τ) in PS has been found lower than that of PS/Fe which is due to the reduction of the non-radiative transitions. Such paths occur when excited carriers escape by tunnelling from less passivated nanocrystallites silicon. The analyses of the TRPL spectra as well as the decay times approve the passivation of Si nanocrystallites by iron. |
| doi_str_mv | 10.1016/j.jallcom.2010.07.055 |
| format | Article |
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eV. The time-resolved photoluminescence (TRPL) of PS and PS/Fe, in the range of some tenth of μs, were investigated at room temperature. Contrary to PS, the TRPL spectrum of PS/Fe exhibits a multi-band profile, attributed to the presence of iron in porous silicon matrix. Hence, the passivation of PS by iron provides the formation of two states located in the PS band gap. The PL decay line shape, in PS and PS/Fe, is well described by stretched exponential. The decay time (
τ) in PS has been found lower than that of PS/Fe which is due to the reduction of the non-radiative transitions. Such paths occur when excited carriers escape by tunnelling from less passivated nanocrystallites silicon. The analyses of the TRPL spectra as well as the decay times approve the passivation of Si nanocrystallites by iron.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2010.07.055</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Cross-disciplinary physics: materials science; rheology ; Decay ; Decay time ; Electron states ; Exact sciences and technology ; Iron ; Materials science ; Methods of electronic structure calculations ; Nanocrystalline materials ; Nanocrystals ; Nanoscale materials and structures: fabrication and characterization ; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation ; Other topics in nanoscale materials and structures ; Passivation ; Photoluminescence ; Physics ; Polystyrene resins ; Porous silicon ; Silicon ; Time-resolved photoluminescence</subject><ispartof>Journal of alloys and compounds, 2010-09, Vol.506 (2), p.496-499</ispartof><rights>2010 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c371t-802f8c15d196b9e44ce2e58f8ad268ea564ec8113a0c03f753d272d86fb586413</citedby><cites>FETCH-LOGICAL-c371t-802f8c15d196b9e44ce2e58f8ad268ea564ec8113a0c03f753d272d86fb586413</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jallcom.2010.07.055$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=23272567$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Rahmani, M.</creatorcontrib><creatorcontrib>Ajlani, H.</creatorcontrib><creatorcontrib>Moadhen, A.</creatorcontrib><creatorcontrib>Zaïbi, M.-A.</creatorcontrib><creatorcontrib>Haji, L.</creatorcontrib><creatorcontrib>Oueslati, M.</creatorcontrib><title>Time-resolved photoluminescence study of stabilised iron–porous silicon nanocomposites</title><title>Journal of alloys and compounds</title><description>Porous silicon (PS) passivated by iron (PS/Fe) shows an intense, board and stable photoluminescence (PL) band centred at 1.77
eV. The time-resolved photoluminescence (TRPL) of PS and PS/Fe, in the range of some tenth of μs, were investigated at room temperature. Contrary to PS, the TRPL spectrum of PS/Fe exhibits a multi-band profile, attributed to the presence of iron in porous silicon matrix. Hence, the passivation of PS by iron provides the formation of two states located in the PS band gap. The PL decay line shape, in PS and PS/Fe, is well described by stretched exponential. The decay time (
τ) in PS has been found lower than that of PS/Fe which is due to the reduction of the non-radiative transitions. Such paths occur when excited carriers escape by tunnelling from less passivated nanocrystallites silicon. The analyses of the TRPL spectra as well as the decay times approve the passivation of Si nanocrystallites by iron.</description><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Decay</subject><subject>Decay time</subject><subject>Electron states</subject><subject>Exact sciences and technology</subject><subject>Iron</subject><subject>Materials science</subject><subject>Methods of electronic structure calculations</subject><subject>Nanocrystalline materials</subject><subject>Nanocrystals</subject><subject>Nanoscale materials and structures: fabrication and characterization</subject><subject>Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation</subject><subject>Other topics in nanoscale materials and structures</subject><subject>Passivation</subject><subject>Photoluminescence</subject><subject>Physics</subject><subject>Polystyrene resins</subject><subject>Porous silicon</subject><subject>Silicon</subject><subject>Time-resolved photoluminescence</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqFkM9KAzEQh4MoWKuPIOxFPG1NNpts9iRS_AeClwreQpqdxZTsZs1sC735Dr6hT2JKi1dPE4ZvZn75CLlkdMYokzer2cp4b0M3K2jq0WpGhTgiE6YqnpdS1sdkQutC5IordUrOEFeUUlZzNiHvC9dBHgGD30CTDR9hDH7duR7QQm8hw3HdbLPQpodZOu8wUS6G_ufrewgxrDHD1LWhz3rThxRiCOhGwHNy0hqPcHGoU_L2cL-YP-Uvr4_P87uX3PKKjbmiRassEw2r5bKGsrRQgFCtMk0hFRghS7CKMW6opbytBG-KqmiUbJdCyZLxKbne7x1i-FwDjrpzKbr3poeUTieopFLVZSLFnrQxIEZo9RBdZ-JWM6p3IvVKH0TqnUhNK51EprmrwwWD1vg2mt46_BsueAokZJW42z0H6bsbB1GjdTuHjYtgR90E98-lX8WGjsY</recordid><startdate>20100917</startdate><enddate>20100917</enddate><creator>Rahmani, M.</creator><creator>Ajlani, H.</creator><creator>Moadhen, A.</creator><creator>Zaïbi, M.-A.</creator><creator>Haji, L.</creator><creator>Oueslati, M.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20100917</creationdate><title>Time-resolved photoluminescence study of stabilised iron–porous silicon nanocomposites</title><author>Rahmani, M. ; 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eV. The time-resolved photoluminescence (TRPL) of PS and PS/Fe, in the range of some tenth of μs, were investigated at room temperature. Contrary to PS, the TRPL spectrum of PS/Fe exhibits a multi-band profile, attributed to the presence of iron in porous silicon matrix. Hence, the passivation of PS by iron provides the formation of two states located in the PS band gap. The PL decay line shape, in PS and PS/Fe, is well described by stretched exponential. The decay time (
τ) in PS has been found lower than that of PS/Fe which is due to the reduction of the non-radiative transitions. Such paths occur when excited carriers escape by tunnelling from less passivated nanocrystallites silicon. The analyses of the TRPL spectra as well as the decay times approve the passivation of Si nanocrystallites by iron.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2010.07.055</doi><tpages>4</tpages></addata></record> |
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| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Decay Decay time Electron states Exact sciences and technology Iron Materials science Methods of electronic structure calculations Nanocrystalline materials Nanocrystals Nanoscale materials and structures: fabrication and characterization Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Other topics in nanoscale materials and structures Passivation Photoluminescence Physics Polystyrene resins Porous silicon Silicon Time-resolved photoluminescence |
| title | Time-resolved photoluminescence study of stabilised iron–porous silicon nanocomposites |
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