LAUSR

Conjugated polymers and small molecules (SMs) with fused electron-rich and electron-deficient building blocks are promising materials for low-cost organic electronic devices. Benzotrithiophene (BTT) is one such electron-rich hybrid building block composed of three fused thiophene moieties with an extended π-system that has been widely used to synthesize a variety of electronic materials. Additionally, BTT is a planar and sulfur-rich core with a number of distinct advantages, including structural diversity, tunable electro-optical properties, and exceptional hole-transport behavior. So far, four BTT-based isomers have been synthesized on a gram scale from seven isomeric structures, three of which are symmetric (BTT1-3) and one of which is asymmetric (BTT5), for use in a variety of optoelectronic applications. However, no report summarizing the progress of BTT-based semiconductors for electronic applications is available. The current review presents an overview of the recent developments in BTT-based monomers, polymers, and SMs, as well as their applications in energy harvesting. Additionally, recent advances on charge transport devices, most notably organic solar cells, organic thin field-effect transistors, and perovskite solar cells were also surveyed and summarized. We anticipate that our comprehensive review will stimulate further research and development of future BTT-based electronic materials, particularly for low-cost and high-performance organic electronic devices . This article is protected by copyright. All rights reserved.