Preparation and Luminescent Properties of Rare Earth-activated Red Emission Phosphors

• Main Authors: Sun, Jui-Ling, 孫瑞伶
• Other Authors: Liu, Po-tsun
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/9tneas

碩士 === 國立交通大學 === 平面顯示技術碩士學位學程 === 105 === In this study, we successfully prepared the novel fluorescent materials and discussed their synthesis methods, luminescence properties and luminescent mechanism to apply to white light emitting diodes. The high temperature solid state method was used to synthesize the new phosphors, Ca2Y8Si6O26:Sm3+, La5BSi2O13:Sm3+, and BaY2Si3O10:Sm3+ with different calcination temperature. The X-ray diffraction, Electron microscopy, fluorescence spectrometer, temperature analyzer, chromaticity coordinates were used to analyze the crystal structure parameters, surface morphology, luminescent properties, fabrication performance, thermal stability and so on. The rare earth ions Sm3+ belong to the f-f forbidden transition, and the experimental results showed that there were multiple absorption narrow peaks appear ranged from 300 nm to 500 nm, which covered with the ultraviolet light and blue chip package. The strongest emission peak of Ca2Y8Si6O26:Sm3+ is locating at 648 nm, the strongest emission peak of BaY2Si3O10:Sm3+ is centered at 602 nm, and the strongest emission peak of La5BSi2O13:Sm3+ is near to 602 nm, and the phosphors are shot out of orange light. In this paper, the red light phosphors were packaged with BaMgAl10O17:Eu2+ blue commercial phosphor and (Ba, Sr)2SiO4:Eu2+ respectively with current red-emitting phosphors with a 390 nm wavelength N-UV light to investigate its luminescent properties.