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Preparation and Characterization of Blue-Emitting （SrCaBa）3（PO4）2·SrCl2: Eu2+ Phosphors

Author: ChengDan
Tutor: ZhangZuoTong
School: Northeast Normal University
Course: Condensed Matter Physics
Keywords: White LED Light Blue phosphor High temperature solid phase
CLC: O482.31
Type: Master's thesis
Year: 2010
Downloads: 99
Quote: 1
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Abstract


The white LED has a series of advantages , low operating voltage , low-power , high lumen efficiency and long life and a new type of environmentally friendly and energy-saving lighting source . Therefore , the white LED light-emitting materials become the research hotspot now . In this paper, a white LED with long-wavelength violet and UV - excited blue fluorescent material . This article first white LED blue phosphor research status and development trends as well as various preparation methods detailed overview . From the a High CRI white LED demand angle selection ( SrCaBa ) 3 (PO 4 < / sub > ) 2 · SrCl 2 : Eu 2 blue phosphor as the object of study . High-temperature solid-phase method successfully prepared in a weak reducing atmosphere ( SrCaBa ) 3 < / sub > ( PO 4 < / sub> ) 2 < / sub > · SrCl to 2 < / sub>: Eu 2 blue phosphors . Detailed study of the reaction material , sintering temperature , Eu 2 < / sup > activator concentration of phosphor luminescence properties . Studies have shown that the temperature in 1200 , Eu 2 doped than the the 0.15 ( SrCaBa ) 3 < / sub > ( PO 4 < / sub> ) 2 < / sub > · SrCl 2 : the of Eu 2 blue phosphor emission peak at 450nm and 200nm-440nm band effectively excited . Further based on Eu 2 with the Tb 3 between energy transfer design preparation ( SrCaBa ) 3 ( PO 4 < / sub > ) 2 · SrCl 2 : Eu 3 , Tb 3 phosphors . Sample under longwave violet and ultraviolet excitation was a mixture of the blue and green emitting dopant concentration can be adjusted from blue to blue-green, which can further improve the color rendering properties of the white LED , the luminescent color with Tb3 . In this paper, the development of the LED with high color rendering white light-emitting materials important .

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CLC: > Mathematical sciences and chemical > Physics > Solid State Physics > Solid nature of the > Optical Properties > Luminescence
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