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Photoinduced space charge effects in a-Si:H solar cells

机译:a-Si:H太阳能电池中的光诱导空间电荷效应

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We have investigated charge collection in thin amorphous silicon solar cells under light bias illumination, both experimetnally and by numerical simulation. In such charge collection experiments, space charge due to trapped bias-light generated carriers leads to an enhancement of a small signal probe beam charge collection. It is found that this enhancement of the small signal charge collection is strongly dependent on the diode thickness and the defect density in the samples. In particular for thin diodes (d<0.5 microns) the charge collection enhancement can be shwon to increase with light-induced degradation of the devices. The effect of these material parameters as well as other experimetnal parameters, such as light bias and probe beam photon flux, will be demonstrated by means of numerical simulation.
机译:我们已经通过实验和数值模拟研究了在偏光照射下的薄非晶硅太阳能电池中的电荷收集。在这种电荷收集实验中,由于捕获的偏置光产生的载流子而引起的空间电荷导致小信号探针束电荷收集的增强。已经发现,小信号电荷收集的增强很大程度上取决于二极管的厚度和样品中的缺陷密度。特别是对于薄的二极管(d <0.5微米),随着光诱导的器件性能下降,电荷收集的增强可以增加。这些材料参数以及其他实验参数(如光偏置和探测束光子通量)的影响将通过数值模拟来证明。

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