Research progress and application of high efficiency organic solar cells based on benzodithiophene donor materials

This summary diagram comprehensively and reasonably reviews the evolution of BDT-based donor materials over the last 20 years by subdividing the molecular design strategies of main-chain engineering, side-chain engineering as well as other engineering based on the detailed molecular structure of BDT-based polymer donors and small molecule donors.


In recent decades, the demand for clean and renewable energy has grown increasingly urgent due to the irreversible alteration of the global climate change. As a result, organic solar cells (OSCs) have emerged as a promising alternative to address this issue. In this review, we summarize the recent progress in the molecular design strategies of benzodithiophene (BDT)-based polymer and small molecule donor materials since their birth, focusing on the development of main-chain engineering, side-chain engineering and other unique molecular design paths. Up to now, the state-of-the-art power conversion efficiency (PCE) of binary OSCs prepared by BDT-based donor materials has approached 20%. This work discusses the potential relationship between the molecular changes of donor materials and photoelectric performance in corresponding OSC devices in detail, thereby presenting a rational molecular design guidance for stable and efficient donor materials in future.

Author list:

Congqi Lin, Ruixiang Peng*, Jingyu Shi, Ziyi Ge*

How to cite:

C. Lin, R. Peng, J. Shi, Z. Ge, Exploration 2024, 20230122.