Photoluminescence properties of Y2O3co-doped with Eu and Bi compounds as red-emitting phosphor for white LED
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Bismuth doped Y2O3: Eu was used as a red phosphor with a very high efficiency and an appropriate emission wavelength of around 310–400 nm. This red phosphor was synthesized by the solid state reaction which is normally used in the field of white LEDs. In this study, we synthesized Y2O3: Eu, Bi phosphors using a solid state reaction. We investigated the effect of the Eu3 + and Bi3 + concentrations and additive fluxes on the emission characteristics. The fabricated phosphors were investigated by analyzing their particle size and crystal structure with scanning electron microscopy and X-ray diffraction (XRD). Their photoluminescence (PL) spectra were also measured at room temperature.
KeywordsRed-emitting phosphor White light emitting diode Y2O3co-doped Eu and Bi Photoluminescence properties
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