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적색 Sr<sub>2</sub>Si<sub>5</sub>N<sub>8</sub>:Eu<sup>2+</sup> 형광체의 발광 파장 제어에 대한 연구
이운호 ( Wunho Lee ),박광원 ( Kwangwon Park ),장원태 ( Wontae Jang ),강태욱 ( Taewook Kang ),이상남 ( Sangnam Lee ) 한국화상학회 2016 한국화상학회지 Vol.22 No.2
Eu<sup>2+</sup>-doped nitride phosphor, Sr<sub>2</sub>Si<sub>5</sub>N<sub>8</sub>:Eu<sup>2+</sup>, was prepared by the carbothermal reduction and nitridation method. Lattice structure is observed by the X-Ray diffractometer. Absorption band peaking at 470 nm is observed by the photoluminescence exitation measurement. The Sr<sub>2</sub>Si<sub>5</sub>N<sub>8</sub>:Eu<sup>2+</sup> phosphor is excited at blue lights in the range of 450 - 470 nm that matches with the InGaN-LEDs. The emission peak position of (Sr<sub>1-x</sub>Eu<sub>x</sub>)<sub>2</sub>Si<sub>5</sub>N<sub>8</sub> phosphor obtained from 628 to 670 nm with increasing Eu<sup>2+</sup> ion concentartion. (Sr<sub>1-x</sub>Eu<sub>x</sub>)<sub>2</sub>Si<sub>5</sub>N<sub>8</sub> phosphor apply to the blue LED with Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup> phosphor which obtained white light of high color rendreing index.