Premium
Toward Additive‐Free Small‐Molecule Organic Solar Cells: Roles of the Donor Crystallization Pathway and Dynamics
Author(s) -
Abdelsamie Maged,
Treat Neil D.,
Zhao Kui,
McDowell Caitlin,
Burgers Mark A.,
Li Ruipeng,
Smilgies DetlefM.,
Stingelin Natalie,
Bazan Guillermo C.,
Amassian Aram
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201503395
Subject(s) - materials science , crystallization , organic solar cell , molecule , small molecule , nanotechnology , organic molecules , chemical engineering , organic chemistry , polymer , chemistry , composite material , biochemistry , engineering
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%.