Ce3+ and Eu2+ doped Sialon dual phosphor ceramic plates for white light emitting diodes
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Recent studies on transparent polycrystalline phosphor ceramic plates (PCPs) show its potential application in high brightnesslaser lighting. Herein, we explore the luminescence properties of Ce3+ cation in transparent Sialon phosphor ceramic plate. Thegreen luminescence was observed in Ce3+ doped Sialon PCP as excited by the 390 nm wavelength. Also, the redshift ofemissions was observed when the excitation wavelength was modulated from UV to blue light. The matrix phases and latticeparameters of Sialon PCPs were analyzed by XRD. The co-doping of Y3+ cations resulted a composite α/β-Sialon phase whiledoping with Gd3+ produced a higher α-Sialon phase. Higher transparency was observed with Gd3+ co-doped sample withgreenish-yellow luminescence under blue light excitation. The optical properties of Gd-α-Sialon: Eu2+ was also investigated. Moreover, a broadband white light was obtained after placing Gd-α-Sialon: Eu2+ on the top of the Gd3+/Ce3+ doped Sialon asa dual plate under blue LED excitation.
Abstract
Recent studies on transparent polycrystalline phosphor ceramic plates (PCPs) show its potential application in high brightnesslaser lighting. Herein, we explore the luminescence properties of Ce3+ cation in transparent Sialon phosphor ceramic plate. Thegreen luminescence was observed in Ce3+ doped Sialon PCP as excited by the 390 nm wavelength. Also, the redshift ofemissions was observed when the excitation wavelength was modulated from UV to blue light. The matrix phases and latticeparameters of Sialon PCPs were analyzed by XRD. The co-doping of Y3+ cations resulted a composite α/β-Sialon phase whiledoping with Gd3+ produced a higher α-Sialon phase. Higher transparency was observed with Gd3+ co-doped sample withgreenish-yellow luminescence under blue light excitation. The optical properties of Gd-α-Sialon: Eu2+ was also investigated. Moreover, a broadband white light was obtained after placing Gd-α-Sialon: Eu2+ on the top of the Gd3+/Ce3+ doped Sialon asa dual plate under blue LED excitation.
참고문헌 (26)
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