Conjugated Inorganic-Organic Hybrid Polymers with p-Block Elements

Conjugated polymers with small band gaps and the ensuing semiconductivity are increasingly used as active layers in organic electronics. In order to achieve purpose-built polymers with specific band gaps and optimized charge transport properties, covalent doping with inorganic main group heteroelements has proven to be a promising strategy during the past 20 years. This review highlights recent advances in the introduction of single heteroatoms of Group 13 to 15 into the organic conjugated main chain of such hybrid polymers, with a particular focus on the fine-tuning of the photophysical properties for applications in electronic devices. The emerging field of polymers containing p-block multiple bonds is covered in the second part, aiming to provide a comprehensive overview of research in the arena of conjugated polymers incorporating main group motifs in the main chain. The electronic and structural properties are significantly altered by the interaction at the inorganic-organic interface and can be optimized using regio- or stereoisomers and targeted post-functionalization. A general trend toward the heavier elements is evident, pushing the door wide open to a vast uncharted terrain with huge potential for further developments in inorganic-organic hybrid polymers for electronics and sensing materials with advanced properties.