A yellow phosphor K2SiF6 activated by Mn2+ ions

作者：Arai Takahiro^*; Arai Yusuke; Takahashi Toru; Adachi Sadao

来源：Journal of Applied Physics, 2010, 108(6): 063506.

DOI：10.1063/1.3481856

• band structure
• crystal structure
• etching
• impurity states
• manganese
• materials preparation
• phosphors
• photoluminescence
• potassium compounds
• silicon compounds
• space groups
• X-ray diffraction

A unique Mn2+-activated phosphor has been synthesized by wet chemical etching of Si wafers in HF/K2Cr2O7 mixed solution with the addition of pure Mn metal. The x-ray diffraction pattern suggests that the synthesized compound is a Mn2+-activaed K2SiF6 phosphor having cubic structure (space group= O-h(5)- Fm3m). The Mn2+-activated K2SiF6 phosphor emits light in the yellow or yellowish green region, depending on the quantity of the Mn additive. This phosphor shows unique photoluminescent properties that have not yet been reported previously. The electronic states of the 3d(5) (Mn2+) electrons in the K2SiF6: Mn2+ phosphor are identified together with those of the 3d(3) (Mn4+) electrons in the conventional K2SiF6:Mn4+ red phosphor. The temperature-dependent photoluminescent properties are explained by the aid of the electronic energy-band diagram of K2SiF6 with taking into account the effects of thermal emission of electrons in the Mn2+ excited states.

• 出版日期2010-9-15