Thin film amorphous silicon tandem solar cells
Amorphous silicon solar module technology has its advantage of being simple and low-cost. However, it has a drawback as well, namely its low quality including instability under illumination due to the so-called Staebler-Wronski effect. It has been found that this instability effect depends on the thickness of i-layers, the thinner the i-layer, the more stable the solar cell is. But the thinner the i-layer, the less photon it can absorb resulting in lower current and efficiency. So, here there is a trade-off.
