硅薄膜电池前电极TCO陷光结构模拟分析  

Simulation and Analysis of Light Trapping Structure for the Front Electrode TCO of Silicon based Thin-film Cells

作　　者：赵双乐 朱晓磊[1] 

机构地区：[1]天津科技大学,天津300222

出　　处：《新技术新工艺》2015年第5期72-75,共4页New Technology & New Process

基　　金：天津市高等学校科技发展基金计划资助项目(20120719)

摘　　要：硅基薄膜电池以其优异性能得到了广泛研究和应用,但还存在转化效率低和光致衰退现象等缺点。为了解决这些问题,研究者在电池中引入了透明导电薄膜层(TCO)。前电极的TCO可以起到增透作用,背电极的TCO则起到了增加反射作用,此外,在TCO表面刻出织构形貌还起到陷光的作用,增加光程,提高吸收效率。本文建立了含有TCO层的硅基薄膜电池模型,利用有限时域差分(FDTD)方法,模拟了不同陷光结构下,光在各电池中的能量密度及其陷光性能。仿真结果显示,三角形TCO层电场强度更高,说明该结构增加了电池中的光程,提高了电池的转化吸收次数和效率,为电池的进一步优化提供了依据。Silicon thin film batteries have been widely researched and used for its advantages, but they also have many faults like low conversion efficiency, staebler-wroski effect and so on. In order to solve these problems, the researchers import transparent conductive oxide （TCO） film in the electrode layer. The effect of TCO in the top electrode can reduce reflection effect, and the back electrode has increased transmission effect, the surface of TCO also can be carved by trapping structure which also plays a role in light. The paper establishes a silicon based thin-film batteries containing TCO layer model by using limited finite difference time domain （FDTD） method. The simulation is under differenl TCO morphology, light energy density in each cell and its optical properties. The simulation resuhs shows that the triangular TCO layer of electric field intensity is higher, and illustrates that this structure is better in increasing the optical path of the battery, improving the absorplion frequency and efficiency of the baltery, which provids a basis for the further optimization of the battery.

关 键 词：硅基薄膜电池 陷光结构 时域有限差分方法 透明导电薄膜 

分 类 号：TK124[动力工程及工程热物理—工程热物理]