Sr1 ？ xCaxGa2S4: Ce,Na 형광체의 합성과 발광 특성
Synthesis and luminescence properties of Sr1 ？ xCaxGa2S4 : Ce,Na phosphors
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초록
일련의 Sr1 - xCaxGa2S4 : Ce,Na 형광체를 고상법으로 합성하였다. Sr1 - xCaxGa2S4 : Ce,Na의 구조와 발광 특성을 조사하였다. Sr1 - xCaxGa2S4 : Ce,Na은 보라색 발광 다이오드의 발광 파장인 400 nm에서 강한 흡수가 있다. SrGa2S4 : Ce,Na의 발광 봉우리는 448 nm와 485 nm에 있다. Sr1 - xCaxGa2S4 : Ce,Na에서 Sr이 Ca으로 부분 치환되면 발광 파장이 장파장으로 이동된다. 다파장 백색 LED를 제작할 때 Sr1 - xCaxGa2S4 : Ce,Na은 보라색 LED로 여기하여 청색 발광 형광체로 사용 될 수 있다.
Abstract
A series of Sr1 xCaxGa2S4 : Ce,Na phosphors have been synthesized by solid-state reaction. The photoluminescenceand structural properties of Sr1 xCaxGa2S4 : Ce,Na have been examined. The Sr1 xCaxGa2S4 : Ce,Na phosphors have a strongSrGa2S4 : Ce,Na are located at 448 nm and 485 nm. The partial replacement of Sr by Ca in Sr1 xCaxGa2S4 : Ce,Na causes ared shift of emission wavelengths. The Sr1 xCaxGa2S4 : Ce,Na can be used as blue emitting phosphors pumped by the violetLED for fabricating the multi-band white LED.
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