[5-[5-[4,8-Bis(5-but-2-enylthiophen-2-yl)-6-[5-(5-methylthiophen-2-yl)thiophen-2-yl]thieno[2,3-f][1]benzothiol-2-yl]thiophen-2-yl]thiophen-2-yl]-trimethylstannane;[9-(6-bromohexyl)-9-(dipropyl-lambda3-bromanyl)-7-methylfluoren-2-yl]-trimethylstannane;[5-[4-(6-bromohexyl)-5-(5-methylthiophen-2-yl)furan-2-yl]thiophen-2-yl]-trimethylstannane;2-[6-[4-(6-bromohexyl)-5-(5-methylthiophen-2-yl)thiophen-2-yl]-2-[4-(6-bromohexyl)-5-(5-trimethylstannylthiophen-2-yl)thiophen-2-yl]-4-[2-tri(propan-2-yl)silylethynyl]thieno[2,3-f][1]benzothiol-8-yl]ethynyl-tri(propan-2-yl)silane;4-(2-methyl-7-trimethylstannylcarbazol-9-yl)bicyclo[4.2.0]octa-1(6),2,4-trien-7-one