【作者】 刘俭；

【导师】 程金树；

【作者基本信息】 武汉理工大学 ， 材料物理与化学， 2012， 硕士

【摘要】 随着能源危机的不断加重,太阳能发电越来越受到人们的重视。但硅太阳能电池作为使用得最广泛的一种太阳能电池,其最高转化效率一直在20%左右。玻璃盖板作为太阳能电池的一个必要部件,其性能直接影响到硅太阳能电池的转化效率。磷酸盐玻璃具有声子能量低,稀土离子溶解度高,发光性能较好等优点。磷酸盐玻璃作为激光玻璃已经被广泛的利用到了各个领域。为了提高太阳能电池的转化效率,本文总结了现阶段硅太阳能电池以及磷酸盐玻璃的研究现状,研究了通过掺杂稀土离子下转换来提高光电转化效率,比较了掺杂不同组分稀土的磷酸盐玻璃,提出了研究太阳能用下转换稀土掺杂磷酸盐玻璃的必要性。本文研究了磷酸盐玻璃的基础组分,掺杂稀土,采用熔融法制备太阳能用下转换磷酸盐玻璃。研究了组分和工艺制度对热膨胀系数、化学稳定性、透过率、发光性能的影响；研究了玻璃的激发光谱和发射光谱的规律。通过以上的实验和理论分析可以得到如下结论：1.探讨了PAB玻璃的形成区,确定了PAB玻璃的形成范围。PAB三元玻璃的形成区域偏向P205和BaO一侧,玻璃组成中A1203的摩尔含量不能超过22.5%。2.以摩尔组成65P2O5-15Al2O3-20BaO为组分的PAB磷酸盐热膨胀系数、化学稳定性、透过率、发光性能最好。3.在PAB系统的玻璃中,Y3+、Sm3+、Nd3+因其外层电子结构的特点,不能起到转换光子以提高太阳能电池效率的作用。4.当Ce3+作为敏化剂与Tb3+双掺的时候,通过交叉弛豫的作用传递能量,可以使一个波长小于300nm的光子转化为两个波长(5Hi→5D4和5D4→7Fi)较长的光子,且当Ce3+含量为1%mol时,Tb3+/Ce3+比值越高,玻璃的下转化效率越高。更多还原

【Abstract】 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 (5Hi→5D4和5D4→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.更多还原