 Organic solar cells have been widely studied due to their low cost and high flexibility. However, they suffer from poor efficiency and short lifetimes due to charge carrier recombination at the interfaces between the active layers and electrodes. In this study, researchers developed a new type of organic solar cell with an electron transport layer, ETL, composed of a blend of organic and organic materials. This combination of materials was found to reduce recombination and increase the efficiency of the solar cell. Additionally, the researchers demonstrated that the use of this ETL can be applied to both fullerines and non-fullerines, suggesting its universal applicability. This article was authored by Zhu Asu, Jose Prince Matalimathu, Joseph Bern slowik, and others.