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題名 Versatile Phosphate Phosphors ABPO4 in White Light-Emitting Diodes: Collocated Characteristic Analysis and Theoretical Calculations
作者 郭光宇
Guo, Guang-Yu
貢獻者 應物所
日期 2010.02
上傳時間 24-Jan-2014 12:22:38 (UTC+8)
摘要 The orthophosphate host family, A`B"P04 (A` = monovalent cation, B" = divalent cation), has recently been made available as phosphors that combine with near-UV lighting chips for use in solid-state white light-emitting diodes (LEDs). This study elucidates the crystalline structure and lattice parameters of the products via a solid-state reaction, using powder X-ray diftraction (XRD) and GSAS refinement. The versatility of the phosphor host A`B"PO4 is established by examining isovalent substitutions of four cations in the structure-Li or K for A`, Sr or Ba for B"-and three doped activators, RE = Eu2+, Tb3+ and Sm3+. The luminescence properties, decay time, and Commission Internationale de l`Eclairage (CIE) chromaticity index are determined for various concentrations of these activators and metal constituents of the host. The thermal stabilities of all of these compounds are determined for the first time from the crystal structure and the coordination environment of the rare-earth metal. The morphology, composition, and particle size were measured in detail. Finally, density functional calculations were performed using the generalized gradient approximation plus an on-site Coulombic interaction correction (GGA+U) scheme to investigate the electronic structures of the KSrPO4 system. A concise model was proposed to explain the luminescence mechanism.
關聯 Journal of American Chemical Society, 132(9), 3020-3028
資料類型 article
DOI http://dx.doi.org/10.1021/ja9092456
dc.contributor 應物所en_US
dc.creator (作者) 郭光宇zh_TW
dc.creator (作者) Guo, Guang-Yuen_US
dc.date (日期) 2010.02en_US
dc.date.accessioned 24-Jan-2014 12:22:38 (UTC+8)-
dc.date.available 24-Jan-2014 12:22:38 (UTC+8)-
dc.date.issued (上傳時間) 24-Jan-2014 12:22:38 (UTC+8)-
dc.identifier.uri (URI) http://nccur.lib.nccu.edu.tw/handle/140.119/63529-
dc.description.abstract (摘要) The orthophosphate host family, A`B"P04 (A` = monovalent cation, B" = divalent cation), has recently been made available as phosphors that combine with near-UV lighting chips for use in solid-state white light-emitting diodes (LEDs). This study elucidates the crystalline structure and lattice parameters of the products via a solid-state reaction, using powder X-ray diftraction (XRD) and GSAS refinement. The versatility of the phosphor host A`B"PO4 is established by examining isovalent substitutions of four cations in the structure-Li or K for A`, Sr or Ba for B"-and three doped activators, RE = Eu2+, Tb3+ and Sm3+. The luminescence properties, decay time, and Commission Internationale de l`Eclairage (CIE) chromaticity index are determined for various concentrations of these activators and metal constituents of the host. The thermal stabilities of all of these compounds are determined for the first time from the crystal structure and the coordination environment of the rare-earth metal. The morphology, composition, and particle size were measured in detail. Finally, density functional calculations were performed using the generalized gradient approximation plus an on-site Coulombic interaction correction (GGA+U) scheme to investigate the electronic structures of the KSrPO4 system. A concise model was proposed to explain the luminescence mechanism.-
dc.format.extent 585640 bytes-
dc.format.mimetype application/pdf-
dc.language.iso en_US-
dc.relation (關聯) Journal of American Chemical Society, 132(9), 3020-3028en_US
dc.title (題名) Versatile Phosphate Phosphors ABPO4 in White Light-Emitting Diodes: Collocated Characteristic Analysis and Theoretical Calculationsen_US
dc.type (資料類型) articleen
dc.identifier.doi (DOI) 10.1021/ja9092456en_US
dc.doi.uri (DOI) http://dx.doi.org/10.1021/ja9092456en_US