[22p-P07-1~25] 12.5 Organic solar cells

[22p-P07-5] Selective Extraction of Non-Fullerene Acceptors from Bulk-Heterojunction Layer in Organic Solar Cells for Detailed Analysis of Microstructure

〇Akira Takahara¹, Masahiro Nakano¹, Kenji Genda¹, Md. Shahiduzzaman², Makoto Karakawa^1,2,3, Tetsuya Taima^1,2,3, Kohshin Takahashi¹ (1.Kanazawa Univ., 2.NanoMaRi, Kanazawa Univ., 3.InFiniti, Kanazawa Univ.)

Keywords:organic solar cells, bulk-heterojunction, nonfullerene acceptor

Detailed analyses of the microstructures of bulk-heterojunction (BHJ) layers are important for improving the efficiency of organic solar cells. However, analyses of the microstructures of BHJ films are difficult because they are composed of a complex mixture of donor and acceptor materials. We have reported a method for the selective extraction of nonfullerene acceptors (NFAs) from a BHJ layer. The microstructures of the BHJ layer was analyzed by analyzing the thin film of donor material only, in which NFAs were removed, and the correlation with photovoltaics properties was evaluated.