Development of Heterojunction Back Contact Si Solar Cells

作者：Nakamura Junichi^*; Asano Naoki; Hieda Takeshi; Okamoto Chikao; Katayama Hiroyuki; Nakamura Kyotaro

来源：IEEE Journal of Photovoltaics, 2014, 4(6): 1491-1495.

DOI：10.1109/JPHOTOV.2014.2358377

• Back contact (BC)
• cell efficiency
• heterojunction
• patterning process
• solar cell

An energy conversion efficiency of 25.1% was achieved in heterojunction back contact (HBC) structure Si solar cell utilizing back contact technology and an amorphous silicon thin-film technology. A new patterning process was established, and it was applied to the fabrication process of HBC cells. In addition, the unique technology of the surface mount technology concept contributed to the superior performance of HBC cell. A short-circuit current density (J(sc)) and an open-circuit voltage (V-oc) were 41.7 mA/cm(2) and 736 mV, respectively. The high J(sc) as well as the high V-oc indicates the strength of HBC structure cell. Besides, a high fill factor of 0.82 was obtained, which shows that HBC structure cell does not have any fundamental critical losses caused from series resistance or shunt resistance. Such high values of I-V parameter means that the patterning process was properly performed.

• 出版日期2014-11