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Subtle Balance Between Length Scale of Phase Separation and Domain Purification in Small‐Molecule Bulk‐Heterojunction Blends under Solvent Vapor Treatment
Author(s) -
Li Miaomiao,
Liu Feng,
Wan Xiangjian,
Ni Wang,
Kan Bin,
Feng Huanran,
Zhang Qian,
Yang Xuan,
Wang Yunchuang,
Zhang Yamin,
Shen Yan,
Russell Thomas P.,
Chen Yongsheng
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.201502645
Subject(s) - solvent , materials science , small molecule , crystallization , molecule , annealing (glass) , boiling , chemical engineering , nanotechnology , organic chemistry , chemistry , biochemistry , engineering , composite material
A series of solvents with different solubilities for DR3TBDTT and PC 71 BM, and different boiling points, is used for solvent vapor annealing (SVA) treatment to systematically investigate the solvent–morphology–performance relationship. The presence of solvent molecules inside bulk‐heterojunction (BHJ) thin films promotes the mobility of both donor and acceptor molecules, leading to crystallization and aggregation, which are important in modulating morphology.