Strategic Engineering of H-/J-Aggregation Equilibrium in Non-Fullerene Acceptors Toward High-performance Organic Photovoltaics

Key Points

• The aim is to control H- and J-aggregation in small-molecule acceptors to improve performance in organic photovoltaics.
• Molecular engineering of asymmetric small-molecule acceptors.
• Use of alkoxyphenyl/2-octyldodecyl side chains.
• Evaluation of electron transport in organic solar cells.
• Enhanced vertical electron transport was observed.
• Controlled aggregation states lead to improved performance.