title: The role of additive in diketopyrrolopyrrole-based small molecular bulk heterojunction solar cells.
abstract: 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.
authors.affiliation: Department of Chemistry, Shanghai University, Shanghai, 200444, P. R. China.
authors.forename: Hongyu
authors.initials: H
authors.lastname: Wang
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
authors.forename: Laju
authors.initials: L
authors.lastname: Bu
authors.forename: Jun
authors.initials: J
authors.lastname: Gao
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Wei
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Russell
mesh_terms: D003460:Crystallization; D011137:Polystyrenes / Q000737:chemistry; D011758:Pyrroles / Q000138:chemical synthesis / Q000737:chemistry*; D012993:Solar Energy; D013876:Thiophenes / Q000737:chemistry; D017971:Tin Compounds / Q000737:chemistry
chemical_list: D011137:Polystyrenes; D011758:Pyrroles; D013876:Thiophenes; D017971:Tin Compounds; C533756:poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate); C109984:indium tin oxide
keywords: X-ray diffraction; crystallization; morphology; organic photovoltaics