Effect of Light Intensity on Current Collection in Thin-Film Solar Cells

We have measured the current-voltage curves of thin-film solar cells using focused laser spots (30 500 μm) using DC and modulated (AC) photocurrent techniques. The AC short-circuit current response (ISC ) and the AC fill factors (FF) decrease for small spot sizes corresponding to several 100 sun light intensities. Laser line scans across the devices… CONTINUE READING