Bulk heterojunction (BHJ)-based organic solar cells realized on glass substrates incorporating antireflective nanoscale subwavelength structures (SWSs) can harness more solar power, leading to greater electrical output power. The power conversion efficiency of the SWS integrated BHJ-based organic solar cell was relatively improved by 7.2% compared with that of conventional solar cell without SWS. (C) 2015 Published by Elsevier B.V.