Affiliation:
1. National Center for Nanoscience and Technology Beijing 100190 China
2. College of Materials Science and Engineering Zhengzhou University Zhengzhou 450001 China
Abstract
AbstractThe A2‐A1‐D‐A1‐A2‐type molecules consist of one electron‐donating (D) core flanked by two electron‐accepting units (A1 and A2) and have emerged as an essential branch of nonfullerene acceptors (NFAs). These molecules generally possess higher molecular energy levels and wider optical bandgaps compared with those of the classic A‐D‐A‐ and A‐DA'D‐A‐type NFAs, owing to the attenuated intramolecular charge transfer effect. These characteristics make them compelling choices for the fabrication of high‐voltage organic photovoltaics (OPVs), ternary OPVs, and indoor OPVs. Herein, the recent progress in the A2‐A1‐D‐A1‐A2‐type NFAs are reviewed, including the molecular engineering, structure‐property relationships, voltage loss (Vloss), device stability, and photovoltaic performance of binary, ternary, and indoor OPVs. Finally, the challenges and provided prospects are discussed for the further development of this type of NFAs.
Funder
Chinese Academy of Sciences
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
1 articles.
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