It is interesting to note that cast quasi-mono cells showed lower Voc and efficiency for ion-implanted cells compared to the
This was because the bulk lifetime in the implanted cast quasi-mono cells
was much lower compared to thePOCl3 diffused cells(Fig. 6 and
Table2). Therefore,the loss in Voc due to lower bulk lifetime in
implanted castq uasi-mono cell was greater than the gainin Voc
due to oxide passivation.Photoluminescence(PL)measurements in
the Fig. 9 also support that POCl3 diffused cast quasi-mono cell has
higher effective lifetime than the implanted cast quasi-mono cells
due tosuperiorgettering.