Figure 1.

Shows various semi conducting polymers from first to third generations: PA-poly acetylene; PV-poly paraphenylene vinylene; PPP-poly para phenylene; PT-poly thiophene; PPy-poly pryrrole; PEDOT-poly ethylene dioxythiophene; P3AT-poly 3(alkyl) thiphene (R-Alkyl group); PCPDBT-poly(2,6-[4,4-bis-(2-ethylhexyl) 4H-cyclopenta (2,1-b;3,4-b¹)dithiophene-alt-4,7-(2,1,3-benzothiadiazole)]; PSBTBT-Poly [(4,4′-bis(2-ethylhexyl)dithieno[3,2-b:2′,3′-d]silole)-2,6-diyl-alt-(2,1,3-benzothiadiazole)-4,6-diyl]; FBT2-poly(9,9-dioctylflourene-co-bithiophene); PBTTT-poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene respectively.