Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (12): 2334.

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Synthesis and Photoluminescence of β-SiAlON:Eu2+ Blue Phosphor

LI YouFen*, LI Jie,YANG JianLong   

  1. Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology,  Beijing 100029, China
  • Received:2010-06-21 Revised:2010-07-14 Online:2010-12-10 Published:2010-12-06
  • Contact: LI YouFen E-mail:yfli@mail.buct.edu.cn
  • About author:李友芬, 女, 博士, 副教授, 主要从事功能材料的研究. E-mail: yfli@mail.buct.edu.cn

Abstract: Blue β-SiAlON:Eu2+ phosphor was synthesized from Si, SiO2, AlN and Eu2O3 powders by metallothermic reduction-nitridation reaction. The influences of firing temperatures on compositions of β-SiAlON:Eu and photoluminescence were investigated by X-ray diffractometer and fluorescent spectrophotometer, respectively. The results indicate that excitation spectra of β-SiAlON:Eu2+ consists of two broad bands centered at 290 nm and 325 nm, and emission spectrum exhibits a single intense broad emission band at ~ 485 nm with 75 nm of half-peak width, which corresponds to 5d-4f transition of Eu2+. The critical concentration of Eu2+ is 8%. The mechanism analysis suggests that the energy transfer between the Eu-Eu ions occurs and the critical distance is 1.44 nm; Eu2+ occupies the space of tubular channel along [001] direction in the β-SiAlON crystal.

Key words: β-SiAlON, thermal reduction process, energy transfer, photoluminescence

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