Impact of Laser-Doped Selective Emitters Parameter for Industrial Mono PERC Solar Cells

Abstract

In this work, we proposed the different laserdoped selective emitters (LDSE) parameters for the industrial mono silicon solar cell applied to screen-printed passivated emitter and rear cell (PERC) structure. We compared the 156.75 × 156.75 mm2 p-type mono silicon PERC process with LDSE process and without LDSE process. It can be found that the different laser parameters induced different sheet resistance. Laser induced damage is investigated for different laser energies with SEM images. The successful LDSE technology PERC solar cells were also increased an absolute gain of 0.15 ~ 0.28 % in average efficiency compared with the standard PERC solar cells. Moreover, it is worthy to note that many previous references have shown that LDSE technology could enhance the efficiency which can be increased by more than 0.4%. In fact, with the improvement of silver paste technology, the LDSE technology can enhance the performance should be only about 0.1 ~ 0.2 %.