고상법으로 합성한 Sr_(4-(x+y+z))Al_(14)O_(25) : Eu_x, Dy_y, Ag_z계 축광성 형광체 장잔광의 연구
Research on Afterglow Brightness of Sr_(4-(x+y+z))Al_(14)O_(25) :Eu_x, Dy_y, Ag_z by Solid State Synthesis
김승우(서울시립대학교); 김정식(서울시립대학교)
49권 4호, 348~354쪽
초록
Long-lasting brightness Sr_4Al_(14)O_(25):Eu^(2+), Dy^(3+), Ag^+ phosphor was synthesized by modified solid state reaction and its photoluminescence was investigated. Sr(NO_3)_2 and Al(NO_3)_3 · 9H_2O as starting materials, and B_2O_3 as a flux were mixed with Eu_2O_3 as an activator, Dy_2O_3 as a coactivator, and AgNO_3 as a charge compensator. The crystalline of target powder showed a single-phase Sr_4Al_(14)O_(25) by the XRD characterization and the average particle size was about 20-30 ㎛ from the FE-SEM observation. Ag^+ ion doping effects (0-0.06 mol) on Sr_4Al_(14)O_(25):Eu^(2+), Dy^(3+), Ag^+ phosphor were measured by photoluminescence spectrometer and luminescence meter. The of photoluminescence intensity of the Sr_(3.64)Al_(14)O_(25):Eu_(0.11), Dy_(0.22),Ag_(0.03) phosphor was higher than other compositions and afterglow brightness was 0.186 cd/m^2.
Abstract
Long-lasting brightness Sr_4Al_(14)O_(25):Eu^(2+), Dy^(3+), Ag^+ phosphor was synthesized by modified solid state reaction and its photoluminescence was investigated. Sr(NO_3)_2 and Al(NO_3)_3 · 9H_2O as starting materials, and B_2O_3 as a flux were mixed with Eu_2O_3 as an activator, Dy_2O_3 as a coactivator, and AgNO_3 as a charge compensator. The crystalline of target powder showed a single-phase Sr_4Al_(14)O_(25) by the XRD characterization and the average particle size was about 20-30 ㎛ from the FE-SEM observation. Ag^+ ion doping effects (0-0.06 mol) on Sr_4Al_(14)O_(25):Eu^(2+), Dy^(3+), Ag^+ phosphor were measured by photoluminescence spectrometer and luminescence meter. The of photoluminescence intensity of the Sr_(3.64)Al_(14)O_(25):Eu_(0.11), Dy_(0.22),Ag_(0.03) phosphor was higher than other compositions and afterglow brightness was 0.186 cd/m^2.
- 발행기관:
- 대한금속·재료학회
- 분류:
- 재료공학