Details

Autor(en) / Beteiligte

• Love, John A
• Chou, Shu-Hua
• Huang, Ye
• Bazan, Guilllermo C
• Nguyen, Thuc-Quyen

Titel

Effects of solvent additive on "s-shaped" curves in solution-processed small molecule solar cells

Ist Teil von

• Beilstein journal of organic chemistry, 2016-11, Vol.12 (1), p.2543-2555

Ort / Verlag

Germany: Beilstein-Institut zur Föerderung der Chemischen Wissenschaften

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• A novel molecular chromophore, p-SIDT(FBTThCA8) , is introduced as an electron-donor material for bulk heterojunction (BHJ) solar cells with broad absorption and near ideal energy levels for the use in combination with common acceptor materials. It is found that films cast from chlorobenzene yield devices with strongly s-shaped current-voltage curves, drastically limiting performance. We find that addition of the common solvent additive diiodooctane, in addition to facilitating crystallization, leads to improved vertical phase separation. This yields much better performing devices, with improved curve shape, demonstrating the importance of morphology control in BHJ devices and improving the understanding of the role of solvent additives.