Figure 5From: Periodic nano/micro-hole array silicon solar cellDark current–voltage and photovoltaic characteristics for the flat Si and etched Si solar cell. (a) The dark current–voltage characteristics for the flat Si and etched Si solar cell. (b) The photovoltaic characteristics for the flat Si and etched Si solar cell. The etching time ranged from 0.5 to 15 min.Back to article page