This book presents two new imaging methods to measure the effective series resistance and sheet resistance on solar cells under operating conditions. The methods are contactless-and are therefore non-destructive-and offer results with high spatial resolution. A standard photoluminescence imaging setup for data acquisition is used for both methods. The high optical resolution typical of these systems allows a simultaneous measurement of millions of data points within seconds, thereby giving the presented methods the potential to be employed in time-sensitive offline process control in...