Low Band Gap Conjugated Semiconducting Polymers

Important parameters of an organic semiconductor material are the electronic band gap (Eg) and position highest occupied lowest unoccupied bands versus vacuum. These called valence conduction for inorganic semiconductors. For semiconductors defining often molecular orbital (HOMO) (LUMO). One advantage semiconducting polymers is ability to tune HOMO LUMO levels by chemical design. The photovoltaic solar cells need absorbers with a smaller bandgap maximize power conversion efficiency these devices. There several strategies synthesize low optoelectronic applications. In this manuscript, updated overview on current status conjugated will be given. design principles polymers, properties resulting materials, important applications devices realized class briefly discussed.