Abstract Using Al2(SO4)3·18H2O and urea as raw materials, the spherical α-Al2O3 powder was prepared by hydrothermal-pyrolysis method. Using self-made α-Al2O3, Y2O3 and CeO2 as raw materials, Y2.93Al5O12∶0.07Ce3+ yellow phosphors for white light LEDs were prepared by solid-phase method. Through X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray energy spectroscopy (EDS) and fluorescence spectroscopy (PL) etc. to characterize the phase, morphology and photoluminescence properties of the product. The results showed that the hydrothermal-pyrolysis method prepared spherical α-Al2O3 powder with pure phase and good dispersibility. Using the α-Al2O3 as raw material, the synthesized α-Al2O3 could be effectively excited by 460 nm blue light, and the emission spectrum peaked at 550 nm. Broadband Y2.93Al5O12∶0.07Ce3+ phosphor with color coordinates (0.453, 0.531 9), The XRD pattern of Y2.93Al5O12∶0.07Ce3+ phosphor was refined with GSAS software. The refined pattern is completely consistent with the XRD test pattern. The four elements of Y, Al, Ce and O are evenly distributed in the yellow phosphor product. The excitation spectrum of Y2.93Al5O12∶0.07Ce3+ yellow phosphor consists of two parts. There are two pronounced absorption peaks at 340 and 460 nm. The 4f energy level of Ce3+ is split into two spectra due to spin-coupling. Branch terms 2F7/2 and 2F5/2, 2F5/2 is the base spectrum term. The excitation peak at 340 nm corresponds to the transition from 2F5/2→5D5/2, the excitation peak at 460 nm belongs to the transition from 2F7/2→5D3/2, and the excitation intensity at 460 nm is stronger than the excitation intensity at 340 nm. The emission spectrum obtained with 460 nm as the monitoring wavelength, the strongest emission peak is at 550 nm, Y2.93Al5O12∶0.07Ce3+ phosphor is a high-performance yellow phosphor suitable for white LEDs.
LI Zhao,WU Kun-yao,WANG Ya-nan, et al. Synthesis and Luminescence Properties of Yellow-Emitting Phosphor Y2.93Al5O12∶0.07Ce3+ Under Blue Light Excitation[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(02): 381-385.
[1] Yu B, Li Y, Zhang R, et al. Journal of Alloys and Compounds, 2021, 852: 157020.
[2] Devi S, Khatkar S P. Journal of Materials Science Materials in Electronics, 2020,31(23):20785.
[3] Vien L T T, Tu N, Viet D X, et al. Journal of Luminescence, 2020, 227: 117522.
[4] LI Zhao, CAO Jing, WANG Yong-feng(李 兆, 曹 静, 王永锋). Journal of the Chinese Society of Rare Earths(中国稀土学报), 2020, 38(2): 139.
[5] Li Zhao, Zhao Xicheng, Jiang Yuanru. Journal of Rare Earths, 2015,33(1): 33.
[6] LI Zhao, CAO Jing, WANG Yong-feng(李 兆, 曹 静, 王永锋). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2019, 39(9): 2879.
[7] SHAO Xiu-chen, ZHOU Sheng-ming, TANG Yan-ru, et al(邵秀晨, 周圣明, 唐燕如, 等). Journal of Inorganic Materials(无机材料学报), 2018, 33(10): 1119.
[8] ZHENG Fei, MAO Yun-wei, YANG Bo-bo, et al(郑 飞, 茅云蔚, 杨波波, 等). Chinese Journal of Luminescence(发光学报), 2019, 40(7): 842.
[9] Li Z, Wang Y, Cao J. Journal of Wuhan University of Technology-Mater Sci. Ed., 2018, 33(5): 1028.
[10] HU Pan, DING Hui, LIU Yong-fu, et al(胡 盼, 丁 慧, 刘永福, 等). Chinese Journal of Luminescence(发光学报), 2020, 41(12): 1504.
[11] Karipbayev Z T, Lisitsyn V M, Mussakhanov D A, et al. Nuclear Instruments and Methods in Physics Research Section B, 2020, 479: 222.
[12] TANG Liang, YE Hui-qi, XIAO Dong(唐 靓, 叶慧琪, 肖 东). Chinese Journal of Luminescence(发光学报), 2018, 39(8): 1051.
[13] XIE Xiao-tong, ZHU Hai-tao, LIU He, et al(谢小彤, 朱海涛, 刘 贺, 等). Laser & Optoelectronics Progress(激光与光电子学进展), 2018, 55(11): 111602.