The role of color luminescence centers Mn, Cu, Co in the semicondutors with wide band gap ZnS, ZnO and their applications

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The role of color luminescence centers Mn, Cu, Co in the semicondutors with wide band gap ZnS, ZnO and their applications

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dc.contributor.author Pham, Van Ben
dc.contributor.author Phan, Trong Tue
dc.date.accessioned 2011-04-20T03:31:40Z
dc.date.available 2011-04-20T03:31:40Z
dc.date.issued 2008
dc.identifier.citation VNU Journal of Science, Mathematics - Physics 24 (2008) 181-187 vi
dc.identifier.issn 0866-8612
dc.identifier.uri http://hdl.handle.net/123456789/849
dc.description VNU Journal of Science, Mathematics - Physics. Vol. 24 (2008), No 4 (M.P), P. 181-187 vi
dc.description.abstract In this paper, materials of ZnS:Cu, ZnS:Mn and ZnO:Co were prepared by ceramic method and co-precipitated method. The presence of transition metals such as Cu2+(3d9), Mn2+(3d5) in ZnS and Co2+(3d7) in ZnO make blue bands at around 476 nm, 486 nm and green band at around 514 nm disappeared. Simultaneously, there are luminescence bands at around 533 nm, 582 nm, 693 nm for bulk samples of ZnS:Cu, ZnS:Mn, ZnO:Co and 603 nm for nanocrystalline sample of ZnS:Mn. These bands are characterized by Cu2+ ions, Mn2+ ions: [4T1-6A1] and Co2+ ions: [4T1-4A2] in ZnS:Cu, ZnS:Mn and ZnO:Co, respectively. Time-resolved luminescence spectra of these samples show that lifetime of electrons at excited states is 1.90 ms, 0.79 ms and 8.60μs corresponding to bulk sample ZnS:Mn, nanocrystalline sample ZnS:Mn and bulk sample ZnS:Cu. The luminescence material of ZnS:Cu has been tested in off-set print for anti-imitated stamps. vi
dc.language.iso en vi
dc.publisher ĐHQGHN vi
dc.subject ZnS vi
dc.subject ZnO vi
dc.subject photoluminescence (PL) vi
dc.subject time-resolved PL spectra. vi
dc.title The role of color luminescence centers Mn, Cu, Co in the semicondutors with wide band gap ZnS, ZnO and their applications vi
dc.type Article vi

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