The Synthesis Of The White Led Fluorescent Glass Materials And Optical Structure Design

As a new generation lighting engineering, Semiconductor lighting technology is one of most promising high-tech areas, and the most potential semiconductor material for energy saving. Semiconductor lighting becomes the new leap after incandescent lamp and fluorescent lamp with the third generation semiconductor material represented by GaN to rise and develop and white led succeed in developing. At the present stage, LED replaced traditional light source in some place. With the rapid development of white LED technology, the luminous efficiency of LED has far exceeded incandescent lamp and fluorescent lamp.Lighting applications have critical requirements on the light source. Although white led develop rapidly, there are still many areas for improvement. Aim white LED fluorescent material preparation technology and lens design, we optimize the method of fluorescent glass preparation, and design a optical lens base on scattered photon extraction (SPE) technology. Details are as follows:1.Described the fundamental of luminescent material and white LED. Give a brief introduction to photometry and radiometry. Give an outline of optical simulation algorithm and SPE theory.2.Synthesis YAG:Ce³⁺ phosphor powder by coprecipitation method. We studied the phase and luminescence of phosphor powder affected by different factor of preparation, and synthesized phosphor powder which has high luminescent intensity excited by 460nm blue light.3.The YAG:Ce³⁺ doped fluorescent glass is synthesized by optimal doping method. The peak of 530nm in wavelength is observed from the fluorescent glass when it was excited by the wave with 460-470nm.4.Sintering and integrated crystallization methods were used to prepare YAG fluorescent glass. The emission around 530nm in wavelength was observed from the florescent glass, when it was excited by the wave with 460-470nm.5.The designing and simulating of LED optical structure are completed. The optical lens with high extraction efficiency was observed by optical simulation. This design of optical lens based on SPE theory is fit for fluorescent glass.