ErP_5O_(14)非晶中从0秒到稳态的粒子数变化过程和发光强度  

The Changing Process of Population Probability and Fluorescence Intensity in ErP_5O_(14) Noncrystalline from 0 Second to Stabilization

作　　者：陈晓波[1] 陈英[1] 李崧[1] 姚文婷[1] 吴正龙[1] 

机构地区：[1]北京师范大学物理系,应用光学北京重点实验室,分析测试中心,北京100875

出　　处：《光谱学与光谱分析》2012年第6期1490-1495,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(10674019);中央高校基本科研业务费专项资金资助

摘　　要：分别对五磷酸盐非晶材料(ErP5O14)在979.3,803.8,521.8,450.0,405.5和378.5nm等光激发下所有能级的动力学过程在改进能量传递理论前后进行了数值模拟比较。结果发现,应用改进后的能量传递速率进行计算模拟的结果才是合理的,其中在521.8,450.0和378.5nm光激发ErP5O14非晶时,4I 13/2→4I 15/2和4I 11/2→4I 15/2跃迁的相对荧光强度的比值分别是979.3nm光激发的2.11倍,2.82倍和2.99倍,均存在有效的4I 13/2→4I 15/2跃迁的红外量子剪裁效应。该研究对于提高锗太阳能电池的转换效率具有潜在的应用前景。The results of numerical simulation were compared respectively with and without considering the improved coefficient for the energy transfer process in ErP5O14 noncrystalline under 521.8,450.0,405.5 and 378.5 nm lights excitation.The results showed that it is essential to take the coefficient into calculation where energy transfer plays a key role.The relative fluorescence intensity ratios of 4I13/2→4I15/2 to 4I11/2→4I15/2 under 523.8,450.0 and 378.5 nm lights excitation were 2.11,2.82 and 2.99 times larger than that under 979.3nm light excitation respectively.There are obviously effective near-infrared（NIR） quantum cutting of 4I13/2→4I15/2 transition.The result indicates that ErP5O14 noncrystalline has potential application in the enhancement of conversion efficiency of germanium solar cells.

关 键 词：近红外量子剪裁 动力学过程 太阳能电池 五磷酸盐非晶 荧光强度比值 

分 类 号：O433.5[机械工程—光学工程] O614.3[理学—光学]