Photoluminescence Properties and White Light Emitting Diodes Applications of NaYSiO4∶Ce3+ Blue Phosphor

被引：0

作者：

Chen L. ^{[1
]}

Yang X. ^{[1
]}

Zhang H. ^{[1
]}

Song F. ^{[2
]}

Leng Z. ^{[1
]}

机构：

[1] School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an

[2] Instrument Analysis Center of Xi’an University of Architecture and Technology, Xi’an University of Architecture and Technology, Xi’an

来源：

Faguang Xuebao/Chinese Journal of Luminescence | 2024年 / 45卷 / 05期

关键词：

blue phosphor; high color rendering index; high-temperature solid-state reaction method; NaYSiO[!sub]4[!/sub]∶Ce[!sup]3+[!/sup; white light emitting diodes;

D O I：

10.37188/CJL.20240038

中图分类号：

学科分类号：

摘要：

A series of NaYSiO4∶xCe3+（0. 01≤x≤0. 05）blue phosphors were synthesized by high-temperature solid-state reaction method. NaYSiO4∶xCe3+ phosphors have a broadband absorption in the 250-360 nm region，which can be well matched with ultraviolet（UV）LED chips. There exist multiple Ce3+ luminescence centers in the NaYSiO4∶ xCe3+ phosphors，which exhibits a broadband blue emission with peak wavelength near 414 nm under UV excitation. Measured across the UV region（300-350 nm），the quantum efficiencies of NaYSiO4∶0. 02Ce3+ phosphor can remain larger than 25%. The NaYSiO4∶0. 02Ce3+ phosphor shows excellent chemical stability，and its emission intensity and quantum efficiency were almost unchanged after being soaked in water for 14 days. The observed significantly spectral blue-shift and rapidly reduced half-maximum full width（FWHM）in the temperature-dependent emission spectra of the NaYSiO4∶0. 02Ce3+ sample can be attributed to the thermally activated phonon-assisted tunneling effect. A bright white light emitting diodes（WLED）with a color rendering index of 95 can be fabricated by depositing the NaYSiO4∶0. 02Ce3+ blue phosphor，commercial（Sr，Ba）2SiO4∶Eu2+ green phosphor and commercial（Ca，Sr）AlSiN3∶ Eu2+ red phosphor on 310 nm UV LED chip. When the drive current gradually increases from 50 mA to 300 mA，the fabricated LED device shows a stable warm-white light emission with almost unchanged color coordinates. These results indicate that NaYSiO4∶0. 02Ce3+ blue phosphor reported here has a potential application in UV LED chip pumped WLED lighting. © 2024 Editorial Office of Chinese Optics. All rights reserved.

引用

页码：745 / 752

页数：7

共 36 条

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