Daewon Chung, Chandran Balamurugan, Byoungwook Park, Hyeonryul Lee, Ilhyeon Cho, Chaerin Yoon, Soyeon Park, Yong-Ryun Jo, Joonhyeon Jeon, Soonil Hong, Sooncheol Kwon
The bulk-heterojunction (BHJ) system that uses a π-conjugated polymer as an electron donor, and a fullerene derivative as an electron acceptor, is widely used in organic solar cells (OSCs) to facilitate efficient charge separation and extraction. However, the conventional BHJ system still suffers from unwanted phase segregation caused by the existence of significant differences in surface energy between the two BHJ components and the charge extraction layer during film formation. In the present work, we demonstrate a sophisticated control of fast film-growth kinetics that can be used to achieve a uniform distribution of donor and acceptor materials in the BHJ layer of OSCs without undesirable phase separation...
March 11, 2024: Nanomaterials