Journal ArticleDOI
Universalization of the Phase Diagram for a Model Rod-Coil Diblock Copolymer
TLDR
In this paper, the Flory−Huggins interaction is measured for a model rod-coil block copolymer system, poly(alkoxyphenylenevinylene-b-isoprene), by fitting the interfacial segregation of block copolerant to a homopolymer interface and by using the random phase approximation (RPA) for block co-olymers.Abstract:
The Flory−Huggins interaction is measured for a model rod−coil block copolymer system, poly(alkoxyphenylenevinylene-b-isoprene), by fitting the interfacial segregation of block copolymer to a homopolymer interface and by using the random phase approximation (RPA) for block copolymers The measured interfacial segregation of a block copolymer to the interface between homopolymers, fit with a self-consistent field theory (SCFT) simulation using χ as a variable parameter, gives a functional form χ = 348/T − 0091 When RPA is applied to neutron scattering curves for the rod−coil system above the order−disorder transition, the theoretical structure factors are inconsistent with observed scattering curves due to complex aggregated structures formed in the nematic and isotropic states Using the Flory−Huggins parameter and a previously measured value of the Maier−Saupe parameter, the PPV-b-PI phase diagram may be converted from system-specific variables to dimensionless parameters Under the assumptions that tread more
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Recent Advances, Design Guidelines, and Prospects of All-Polymer Solar Cells.
TL;DR: This review provides a comprehensive overview of the important work in all-PSCs including rational design rules for efficient PDs and PAs, blend morphology control, and light harvesting engineering, and highlights the importance of all- PSCs for future implementation and commercialization.
Journal ArticleDOI
Block Copolymers for Organic Optoelectronics
TL;DR: In this paper, the authors describe both the synthesis and self-assembly of block copolymers for organic optoelectronics, and suggest that block-copolymer strategies previously employed for more classical, insulating polymer systems may be very useful in organic electronics.
Journal ArticleDOI
Determining the role of polymer molecular weight for high-performance all-polymer solar cells: its effect on polymer aggregation and phase separation.
Hyunbum Kang,Mohammad Afsar Uddin,Changyeon Lee,Ki-Hyun Kim,Thanh Luan Nguyen,Wonho Lee,Yuxiang Li,Cheng Wang,Han Young Woo,Bumjoon J. Kim +9 more
TL;DR: High M(n) PPDT2FBT(H) promoted a strong "face-on" geometry in the blend film, suppressed the formation of an excessively large crystalline domain, and facilitated molecularly intermixed phases with P(NDI2OD-T2), leading to a power conversion efficiency exceeding 5%, which is one of the highest values for all-PSCs reported thus far.
Journal ArticleDOI
Crystallization assisted self-assembly of semicrystalline block copolymers
Wei-Na He,Jun-Ting Xu +1 more
TL;DR: In this paper, the self-assembly of block copolymers (BCPs) in the presence of crystallization is reviewed, for BCPs in the bulk, thin films, single crystals and micelles.
Journal ArticleDOI
Mesogen -jacketed liquid crystalline polymers
TL;DR: The semi-rigid rod-like MJLCP with a tunable rod shape in both length and diameter provides an excellent building block in designing novel rod-coil liquid crystalline block copolymers which can self-assemble into hierarchical supramolecular nanostructures depending on the competition between liquid crystal formation and microphase separation.
References
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Approximations Leading to a Unified Exponential/Power-Law Approach to Small-Angle Scattering
TL;DR: In this article, a unified approach to the analysis of small-angle scattering is presented that describes scattering from complex systems that contain multiple levels of related structural features, such as the overall radius of gyration and the substructural persistence length.
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The 30 m Small-Angle Neutron Scattering Instruments at the National Institute of Standards and Technology
TL;DR: In this paper, two high-resolution, general-purpose, small-angle neutron scattering instruments have been constructed at the National Institute of Standards and Technology's Center for Neutron Research.