RT - Journal Article T1 - Effect of polymer structure on the performance of organic solar cells JF - opsi YR - 2015 JO - opsi VO - 21 IS - 0 UR - http://opsi.ir/article-1-613-en.html SP - 441 EP - 444 K1 - polymer solar cell K1 - Tandem structure K1 - Multi-junction solar cells AB - Polymer solar cells structure contains an active layer of organic molecules placed between two electrodes. To facilitate the separated charges and increase the efficiency, the active layer includes two layers of donor and acceptor. In this paper three alternative copolymers of PCPDT-BT, PCPDT - DFBT, PDTP - DFBT have been investigated as active layers. Also, the microscopic affecting the efficiency of solar cells is calculated. Finally comparison between polymer solar cells in a single layer and multi-layer structures has been presented. LA eng UL http://opsi.ir/article-1-613-en.html M3 ER -