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http://cio.repositorioinstitucional.mx/jspui/handle/1002/655| White Light Generation from Yag/Yam:Ce3þ, Pr3þ, Cr3þ Nanophosphors Mixed with a Blue Dye Under 340nm Excitation | |
| JORGE OLIVA UC ELDER DE LA ROSA CRUZ LUIS ARMANDO DIAZ TORRES | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| The structural and luminescent properties of Y3Al5O12/Y4Al2O9:Ce3þ(0.1%)–Pr3þ(0.1%) –Cr3þ (trace impurities) nophosphors synthesized by a simple hydrothermal method were studied.The crystalline phase was composed of Yttrium Aluminum Garnet (YAG) and Yttrium Aluminum Monoclinic (YAM) depending on the ammonia concentration and an nealing temperature. Ammonia increased the stabilization of YAG from55wt % to 63wt% in the samples annealed at 900 1C, and an increment of 83% of the over all emission under 460 nm excitation was observed. Quenching of the emitted signal after annealing at 1100 1C was observed inspite of single YAG crystalline phase stabilization,due to the formation of Ce4þ, Pr4þ, and color centers. In addition to the green–yellow emission from Ce3þ, all samples present a broadred emission band produced by the relaxations from the broadband 4T2 toward the 4A2 energy level of Cr3þ impurities, under 340nm excitation.By taking advantage of this broad green–yellow–red emission and using a blue dye,white light with CIE coordinates of (0.30,0.36) under 340 nm excitation was produced. | |
| 24-04-2014 | |
| Artículo | |
| CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA | |
| Aparece en las colecciones: | Articulos Arbitrados 2014 |
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| 2014.- White light generation from, Elder.pdf | 1.93 MB | Adobe PDF | Visualizar/Abrir |