Because Eu2+ is surrounded by host ions, mixed states of 4f5d will be split by the crystal field and the luminescent wavelength will be changed.

 
  • 由于Eu2+被基质离子所包围,基质离子所产生的晶体场使Eu2+离子的4f65d混合能级劈裂,从而改变发光的波长。
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