Performance of bulk heterojunction solar cells fabricated using spray-deposited poly[[9-(1-octylnonyl)-9h-carbazole-2,7-diyl]-2,5-thiophenediyl- 2,1,3-benzothiadiazole-4,7-diyl-2,5-thiophenediyl]/[6,6]-phenyl C71 butyric acid methyl ester blend active layers

Abstract

The Poly[[9-(1-octylnonyl)-9H-carbazole-2,7-diyl]-2,5-thiophenediyl-2,1,3- benzothia diazole-4,7-diyl-2,5-thiophenediyl]/[6,6]-phenyl C71 butyric acid methyl ester blend active layers were prepared by spray deposition method with different preparative conditions. The active layers were prepared with and without TiO x layer in order to study the property changes. The absorption and surface morphology of the active layers were analyzed using UV-visible spectral and atomic force microscopic studies. The photovoltaic cells were fabricated using the spray-coated active layers with and without TiO x layer. The results were compared with the cells fabricated using the conventional spin-coated active layers. © 2013 Im-Jun No et al.