Organic polymer semiconductors are key materials for research in organic electronics. Efforts to develop field-effect transistors (FETs), plastic solar cells, organic RFIDs, and electrochemical sensors all depend on availability of reliable organic semiconductors with choices of different molecular architectures and consistent quality. Sigma-Aldrich is pleased to offer these conjugated polymer semiconductors.
Poly(3-alkylthiophenes) are used as p-channel conductors in organic FETs,1 and p-type materials in heterojunction photovoltaic (PV) devices2 with highest performance achieved to-date. Semiconductor performance of these polymers can be degraded by residual catalyst impurities,3 defects in polymer chain regiospecificity,4,5 and low molecular weight of the polymers. Our electronic-grade poly(3-alkylthiophenes) are highest quality materials available in the research market, with consistently high purity, regioregularity, and molecular weight. The choice of the hexyl-, octyl-, and dodecyl- side-chains will allow you to explore effects of polymer architecture6 without worrying about differences in quality of the materials.
Availability of n-type (electron-mobile) organic semiconductors is one of the main challenges to fabricating n-channel FETs and heterojunctions PVs. We are pleased to offer the ladder polymer poly(benzobisimidazobenzophenanthroline (BBL), one of the few conjugated polymers showing n-channel behavior. This material, processed from solutions in methanesulfonic acid, shows high electron mobility in polymer FETs.7 Organic solar cells with promising performance were fabricated from BBL with MEH-PPV 8 and poly(3-alkylthiophene)9 p-type polymers.