A green-yellow emitting β-Sr2SiO4:Eu2+ phosphor for near ultraviolet chip white-light-emitting diode
来源期刊：Journal of Rare Earths2008年第3期
论文作者：孙晓园 张家骅 张霞 骆永石 王笑军
文章页码：421 - 424
摘 要：Sr2SiO4:xEu2+ phosphors were synthesized through the solid-state reaction technique. The crystal phase of Sr2SiO4:xEu2+ phosphor manipulated by Eu2+ concentration was studied. The phase transited from β to α′ in Sr2SiO4:xEu2+ phosphor with increasing europium concentration. The single β phase was formed as x≤0.005 and changed α′ phase when x>0.01. The emission spectrum of the β-Sr2SiO4:Eu2+ phosphor consisted of a green-yellow broadband peaking at around 540 nm and a blue band at 470 nm under near ultraviolet excitation. The white LEDs by combining near ultraviolet chips with β-Sr2SiO4:Eu2+ phosphors were fabricated. The luminous efficiency （15.7 lm/W） was higher than α′-Sr2SiO4:Eu2+ phosphor white LED.
孙晓园，张家骅，张霞，骆永石，王笑军
摘 要：Sr2SiO4:xEu2+ phosphors were synthesized through the solid-state reaction technique. The crystal phase of Sr2SiO4:xEu2+ phosphor manipulated by Eu2+ concentration was studied. The phase transited from β to α′ in Sr2SiO4:xEu2+ phosphor with increasing europium concentration. The single β phase was formed as x≤0.005 and changed α′ phase when x>0.01. The emission spectrum of the β-Sr2SiO4:Eu2+ phosphor consisted of a green-yellow broadband peaking at around 540 nm and a blue band at 470 nm under near ultraviolet excitation. The white LEDs by combining near ultraviolet chips with β-Sr2SiO4:Eu2+ phosphors were fabricated. The luminous efficiency （15.7 lm/W） was higher than α′-Sr2SiO4:Eu2+ phosphor white LED.
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