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- 저자 : Jiangchun Li (검색결과 1 건)
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Xiaobo Xiong,Jiangchun Li 한국전기전자재료학회 2021 Transactions on Electrical and Electronic Material Vol.22 No.1
Si 4+ and Eu 3+ co-doped LiZnPO 4 phosphors (LZPS:Eu 3+ ) with red luminescence were prepared by high temperature solidstate reaction. The maximum photoluminescence intensity is achieved at the Eu 3+ content of 12% (molar concentration). The study also investigated the effect on luminescent properties of LiZnPO 4 :Eu 3+ by the introduction of Si 4+ into the host to substitute P 5+ . The Eu 3+ emission intensity at 592 nm and 612 nm is enhanced by 105% and 108%, respectively. Decreasing the amount of Eu 3+ signifi cantly reduces the raw material costs. The phosphor is efficiently excited under 395 nm and 254 nm ultraviolet radiation, and is used as the red component in white light-emitting diodes (WLEDs) or fluorescent lamps. The excitation spectra consist of a broad band extending 200–280 nm and a series of sharp peaks extending 310–500 nm, centered at 395 nm, which corresponds to the charge transfer band of O 2− → Eu 3+ and the f → f transition of Eu 3+ , respectively. The study applies this distinctly bright phosphor in the detection and imaging of lipid fingermarks on common non-porous and semi-porous substrates such as colored paper, glass, porcelain, and leather, etc. All results indicate that the LZPS:Eu 3+ phosphor is an ideal detection powder for background interference reduction due to its high fluorescence brightness which offers high contrast images, which is applicable to the development of fi ngermarks on the common non-porous and semiporous substrates.
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