Symmetrical and Crossed Double-sided Passivation Emitter and Surface Field Solar Cells for Bifacial Applications

摘要

This paper proposes symmetrical and crossed double-sided passivation emitter and surface field solar cells for bifacial applications which are fully compatible with the PERC fabrication process. Our simulations use Silvaco TCAD Atlas, calibrated by real measurements. At 100% albedo level, these symmetrical and crossed structures boost energy by 88.78 % and 106.74 %, respectively. The reason for the crossed structure's better performance is that it has a surrounding electric field. The crossed structure also obtains a 40.18 mA/cm~2 short-circuit current (Jsc), a 0.67 V open-circuit voltage (Voc), an 81.07 % fill factor (F.F.) and a 21.93 % conversion efficiency (η). Compared with PERC+, the crossed structure improves low bifaciality factor (Φ_η) and increases η by 6.44% and energy boost by 31.41% for bifacial