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The Role of Additive in Diketopyrrolopyrrole‐Based Small Molecular Bulk Heterojunction Solar Cells
Author(s) -
Wang Hongyu,
Liu Feng,
Bu Laju,
Gao Jun,
Wang Cheng,
Wei Wei,
Russell Thomas P.
Publication year - 2013
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.201302848
Subject(s) - materials science , crystallization , nanotechnology , chemical engineering , engineering
A new diketopyrrolopyrrole‐based small molecule for solution‐processed OPVs is synthesized. The chemical additive has a profound effect in refining the morphology and, thus, significantly increases the efficiencies of the devices. The role of the additive is characterized by various techniques and the additive‐driven structure–property relationship is established, which reveals that the additive affects the crystallization, PCBM aggregation, and phase separation.