Research On The Composite, Microstructure And Properties Of Rare Earth Doped Phosphate Glass For Solar Use

As the energy crisis are more serious day by day, solar power is considered more and more important.The highest conversion efficiency of th silicon solar cells is about20%while it’s the most widely-used solar battery. Glass cover plate affects the performance and the conversion efficiency of silicon solar cells directly as a necessary component of the solar cell. Phosphate glasse has characters of low phonon energy, high solubility of rare earth ions, and good luminescent properties, etc.. Phosphate glass has been extensive used in various fields as laser glass. This paper summarized the status of studies of silicon solar cells and the phosphate glass at this stage to improve the photoelectric conversion efficiency of conversion by doping rare earth ions,compared the different components of rare earth doped phosphate glass and inferred the necessity of research of conversion of rare earth doped into phosphate glass for solar use.In this article, rare-earth doped glass was prepared as a basement composition of phosphate glass via melting method.The effect of process and component to the coefficient of thermal expansion, chemical stability, transparency and light-emitting properties is determined, the emission and excitation spectra of the glass are tested, and its microstructure were studied. By the experimental and theoretical analysis above, we have the following conclusions:1.The final component is irrelevant to the temperature of feeding; feeding at1100℃will result in the best glass mass and most economical use of raw materials; molten glass must be taken out and annealed in organized process to avoid burst of glass or impacts to the performance of the glass.2.Explored forming area of PAB glass,the range of PAB glass has been decided.3.PAB phosphate components of65P2O5-15Al2O3-20BaO has a best balanced thermal expansion, chemical stability, transmittance, the luminescent properties.4. Y3+, Sm3+and Nd3+, because of their outer layer of electronic structure can not convert photons to improve efficiency of solar cell; glass doped Ce3+as a sensitizer and Tb3+as booster, can convert photons with wavelength lower than 300nm to two photons of which longer wavelength (5Hiâ†'5D4å'Œ5D4â†'7Fi), and the ratio of Tb3+/Ce3+is higher with the content of Ce3+as1%mol, the higher the efficiency of the glass transition we will get.