Toward Additive-Free Small-Molecule Organic Solar Cells: Roles of the Donor Crystallization Pathway and Dynamics

Maged Abdelsamie, Neil D. Treat, Kui Zhao, Caitlin McDowell, Mark A. Burgers, Ruipeng Li, Detlef-M. Smilgies, Natalie Stingelin, Guillermo C. Bazan, Aram Amassian

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

The ease with which small-molecule donors crystallize during solution processing is directly linked to the need for solvent additives. Donor molecules that get trapped in disordered (H1) or liquid crystalline (T1) mesophases require additive processing to promote crystallization, phase separation, and efficient light harvesting. A donor material (X2) that crystallizes directly from solution yields additive-free solar cells with an efficiency of 7.6%. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)7285-7292
Number of pages8
JournalAdvanced Materials
Volume27
Issue number45
DOIs
StatePublished - Sep 29 2015

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