Journal ArticleDOI
Efficient Small Molecule Bulk Heterojunction Solar Cells with High Fill Factors via Pyrene-Directed Molecular Self-Assembly
Olivia P. Lee,Alan T. Yiu,Alan T. Yiu,Pierre M. Beaujuge,Pierre M. Beaujuge,Pierre M. Beaujuge,Claire H. Woo,Claire H. Woo,Thomas W. Holcombe,Jill E. Millstone,Jill E. Millstone,Jessica D. Douglas,Jessica D. Douglas,Mark S. Chen,Jean M. J. Fréchet,Jean M. J. Fréchet,Jean M. J. Fréchet +16 more
TLDR
This work has shown that attaching C2-pyrene as the small molecule end-group to a diketopyrrolopyrrole core leads to materials with a tight, aligned crystal packing and favorable morphology dictated by π-π interactions, resulting in high power conversion efficiencies and high fill factors.Abstract:
Efficient organic photovoltaic (OPV) materials are constructed by attaching completely planar, symmetric end-groups to donor-acceptor electroactive small molecules. Appending C2-pyrene as the small molecule end-group to a diketopyrrolopyrrole core leads to materials with a tight, aligned crystal packing and favorable morphology dictated by π-π interactions, resulting in high power conversion efficiencies and high fill factors. The use of end-groups to direct molecular self-assembly is an effective strategy for designing high-performance small molecule OPV devices.read more
Citations
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Journal ArticleDOI
Small molecule semiconductors for high-efficiency organic photovoltaics
TL;DR: This review summarizes the developments in small molecular donors, acceptors, and donor-acceptor dyad systems for high-performance multilayer, bulk heterojunction, and single-component OPVs and focuses on correlations of molecular chemical structures with properties, such as absorption, energy levels, charge mobilities, and photovoltaic performances.
Journal ArticleDOI
Highly π-extended copolymers with diketopyrrolopyrrole moieties for high-performance field-effect transistors.
TL;DR: Two donor-acceptor (D-A) copolymer PDVTs based on diketopyrrolopyrole and (E)-2-(2-(thiophen-2-yl)vinyl)thiophene (TVT) units are synthesized for solution-processed field-effect transistors (FETs) to strengthen the coplanarity of the polymer backbone.
Journal ArticleDOI
Design of nanostructures based on aromatic peptide amphiphiles
TL;DR: This review rationalises the structural features which govern the self-assembly of aromatic peptide amphiphiles by focusing on four segments, paving the way to a more rational design of nanomaterials based on aromatic peptides.
Journal ArticleDOI
Diketopyrrolopyrrole (DPP)-based materials for organic photovoltaics
Sanyin Qu,He Tian +1 more
TL;DR: The application of DPP-based materials is described, highlighting the applications in optoelectrical fields.
Journal ArticleDOI
Organic and Polymeric Semiconductors Enhanced by Noncovalent Conformational Locks.
TL;DR: This review offers a comprehensive and general summary of conjugated systems with such noncovalent conformational locks, including O···S, N··· s, X···s, and H··S through-space interactions, together with analysis by density functional theory computation, X-ray diffraction, and microstructural characterization, as well as by evaluation of charge transport in organic thin-film transistors and solar cells.
References
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Journal ArticleDOI
Polymer–Fullerene Composite Solar Cells
TL;DR: Polymer-based organic photovoltaic systems hold the promise for a cost-effective, lightweight solar energy conversion platform, which could benefit from simple solution processing of the active layer.
Journal ArticleDOI
For the Bright Future—Bulk Heterojunction Polymer Solar Cells with Power Conversion Efficiency of 7.4%
TL;DR: The past success in organic light-emitting diodes provides scientists with confidence that organic photovoltaic devices will be a vital alternate to the inorganic counterpart, and the easiness of the fabrication holds the promise of very low-cost manufacturing process.
Journal ArticleDOI
C−H Activation for the Construction of C−B Bonds
TL;DR: Investigations revealed that the conversion of C-H bonds to C-B bonds was both thermodynamically and kinetically favorable and highlighted the accessible barriers for C- H bond cleavage and B-C bond formation during the borylation of alkanes and arenes.
Journal ArticleDOI
Materials and applications for large area electronics: solution-based approaches.
TL;DR: This work focuses on Organic Electronics Materials, which consist of Organic Transistors, Polymer Semiconductors, and Poly(3,2-b)thiophenes, and investigates the role of bias stress in these materials.
Journal ArticleDOI
Dependence of Regioregular Poly(3-hexylthiophene) Film Morphology and Field-Effect Mobility on Molecular Weight
R. Joseph Kline,Michael D. McGehee,Ekaterina N. Kadnikova,Jinsong Liu,Jean M. J. Fréchet,Michael F. Toney +5 more
TL;DR: In this article, the authors showed that in-plane π-stacking does not cause the mobility−MW relationship, and that modifying the morphology for a constant number-average molecular weight (MW) by changing the casting conditions or annealing the samples strongly affects the charge transport and morphology in the low-mobility, low-MW films, but has little effect on the high-mogulular poly(3-hexylthiophene).