Spectroscopy and Spectral Analysis, Volume. 37, Issue 10, 3032(2017)

Syntheses and Photoluminescence Properities of LaSi3N5∶Ce3+ Blue Phosphors by Carbothermal Reduction Method

CHEN Ru-biao1、*, WANG Le1, ZHOU Tian-liang2, LI Xiao-yan1, LUO Dong1, and PAN Hua-yan1
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  • 1[in Chinese]
  • 2[in Chinese]
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    LaSi3N5∶Ce3+blue phosphors were prepared by carbothermal reduction method. The influence of C content and heat-dealing on purity and luminescence of samples were investigated. The phosphors were characterized by X-ray diffraction (XRD) and fluorescence spectrophotometer (PL). XRD patterns revealed that LaSi3N5∶Ce3+could be combusted at 1 600 ℃. There was a single-peak broadwide emission spectrum between 380~600 nm due to the electron transfer of Ce3+ from 5d-4f excited by 360 nm. The luminescence intensity reached the maximum value atnC/nLa=4/1 followed by a continuous decline with a red shift and then a blue shift appeared in the spectrum. The luminescence intensity of samples improved 60%~345% after heat-dealing. WLED were fabricated by applying a blend mixture of the sample and commercial YAG on a UV chip (λ blend m), which indicated that LaSi3N5∶Ce3+blue phosphor had a potential application value in WLED.

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    CHEN Ru-biao, WANG Le, ZHOU Tian-liang, LI Xiao-yan, LUO Dong, PAN Hua-yan. Syntheses and Photoluminescence Properities of LaSi3N5∶Ce3+ Blue Phosphors by Carbothermal Reduction Method[J]. Spectroscopy and Spectral Analysis, 2017, 37(10): 3032

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    Paper Information

    Received: Oct. 31, 2016

    Accepted: --

    Published Online: Dec. 25, 2017

    The Author Email: Ru-biao CHEN (403242329@qq.com)

    DOI:10.3964/j.issn.1000-0593(2017)10-3032-05

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