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.
Abstract:
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, 4, 20230122.
https://doi.org/10.1002/EXP.20230122