空间分辨电致发光成像法测量CIGS太阳电池窗口层薄层电阻
Measuring sheet resistance of CIGS solar cell's window layer by spatially resolved electroluminescence imaging
摘要：
开发了空间分辨电致发光（EL）成像实验以直接在完成的CIGS电池上测量窗口层的局部薄层电阻。我们的方法可以应用于在基础研究以及在线过程检测中进行的EL成像研究（1-3）。EL实验包括使用太阳能电池作为发光器件：向电池施加电压并检测其发光。我们发展了一个分析和定量的模型来模拟CIGS太阳能电池的行为的基础上，在窗口层的薄层电阻扩散效应。我们确定的电势的ZnO上的再分配，对于给定的电池的特性，如薄层电阻和接触几何形状。已知电势的再分配，估计EL强度并拟合实验EL信号，这允许确定窗口层薄层电阻。
英文摘要：
A spatially resolved electroluminescence (EL) imaging experiment is developed to measure the local sheet resistance of the window layer, directly on the completed CIGS cell. Our method can be applied to the EL imaging studies that are made in fundamental studies as well as in in-line process inspection (1-3). The EL experiment consists in using solar cell as a light emitting device : a voltage is applied to the cell and its luminescence is detected. We develop an analytical and quantitative model to simulate the behavior of CIGS solar cells based on the spread sheet resistance effect in the window layer. We determine the repartition of the electric potential on the ZnO, for given cell's characteristics such as sheet resistance and contact geometries. Knowing the repartition of the potential, the EL intensity is estimated and the experimental EL signal is fitted, which allows the determination of the window layer sheet resistance.
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