高等学校化学学报

高等学校化学学报

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Sr2MgSiO5∶Ce3+的发光性质研究

杨志平, 刘玉峰, 熊志军   

  1. 河北大学物理科学与技术学院, 保定 071002
  • 收稿日期:2006-04-10 修回日期:1900-01-01 出版日期:2006-10-10 发布日期:2006-10-10
  • 通讯作者: 杨志平

Luminescent Properties of Ce3+-Doped Sr2MgSiO5 Blue-emitting Phosphor

YANG Zhi-Ping, LIU Yu-Feng, XIONG Zhi-Jun   

  1. College of Physic Science & Technology, Hebei University, Baoding 071002, China
  • Received:2006-04-10 Revised:1900-01-01 Online:2006-10-10 Published:2006-10-10
  • Contact: YANG Zhi-Ping

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摘要： 报道了Sr2MgSiO5∶Ce3+荧光粉的发光性质.

关键词: 发光性质, 荧光粉, Sr2MgSiO5∶Ce3+

Abstract: The intense blue emitting phosphors Sr2MgSiO5∶Ce3+ were synthesized by high temperature solid state reaction method, and their luminescence properties were studied. The intense blue-emission band present a peak fixed at 420 nm, which consists of two peaks located at 408 and 445 nm, respectively. The two peaks are originated from the transition 5d→2F5/2(4f) and 5d→2F7/2(4f) of Ce3+ ions. The energy level difference value of the two emission bands is 2 038 cm-1, which is consistent with the theoretic value(2 000 cm-1) between the ground state: 2F5/2 and 2F7/2 of Ce3+ ions. The excitation spectra extend from 250 to 400 nm and the peak positions around 365 nm. In addition, the effect of the concentration of Ce3+ ions and the role of charge compensation of different ions to the emission intense were investigated, the experiment results suggest that when the proportion of Ce3+ ions to Sr2MgSiO5 were 0.03(molar ratio), the strongest emission was obtained. Li+, Na+, K+ and Cl- ions can all enhance the intensity of the emissions; especially Cl- ions gave the best improvement.

Key words: Luminescent property, Phosphor , Sr2MgSiO5∶Ce3+

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