Journal ArticleDOI
Organization of Acenes with a Cruciform Assembly Motif
Qian Miao,X. Chi,Shengxiong Xiao,Roswitha Zeis,Michael Lefenfeld,Theo Siegrist,Michael L. Steigerwald,Colin Nuckolls +7 more
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TLDR
This study explores the assembly in the crystalline state of a class of pentacenes that are substituted along their long edges with aromatic rings forming rigid, cruciform molecules, and finds that a planar acene core is the exception rather than the rule.Abstract:
This study explores the assembly in the crystalline state of a class of pentacenes that are substituted along their long edges with aromatic rings forming rigid, cruciform molecules. The crystals were grown from the gas phase, and their structures were compared with DFT-optimized geometries. Both crystallographic and computed structures show that a planar acene core is the exception rather than the rule. In the assembly of these molecules, the phenyl groups block the herringbone motif and further guide the arrangement of the acene core into higher order structures. The packing for the phenyl-substituted derivatives is dictated by close contacts between the C-H's of the pendant aromatic rings and the carbons at the fusions in the acene backbone. Using thiophene substituents instead of phenyls creates cofacially stacked acenes. In thin films, the thiophene-substituted derivative forms devices with good electrical properties: relatively high mobility, high ON/OFF ratios, and low threshold voltage for device activation. An unusual result is obtained for the decaphenyl pentacene when devices are fabricated on its crystalline surface. Although its acene cores are well isolated from each other, this material still exhibits good electrical properties.read more
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Semiconducting π-conjugated systems in field-effect transistors: a material odyssey of organic electronics.
TL;DR: The focus of this review will be on the performance analysis of π-conjugated systems in OFETs, a kind of device consisting of an organic semiconducting layer, a gate insulator layer, and three terminals that provide an important insight into the charge transport of ρconjugate systems.
Journal ArticleDOI
The larger acenes: versatile organic semiconductors.
TL;DR: New approaches to add functionality were developed to improve the processability of these materials in solution, allowing the synthesis of acenes larger than pentacene, which have hitherto been largely unavailable and poorly studied.
Journal ArticleDOI
Twisted Intramolecular Charge Transfer and Aggregation-Induced Emission of BODIPY Derivatives
Rongrong Hu,Erik Lager,Angelica Aguilar-Aguilar,Jianzhao Liu,Jacky Wing Yip Lam,Herman H. Y. Sung,Ian D. Williams,Yongchun Zhong,Kam Sing Wong,Eduardo Peña-Cabrera,Ben Zhong Tang +10 more
TL;DR: Boron dipyrromethene (BODIPY) derivatives 1 and 2 consisting of donor and acceptor units with dual photoresponses to solvent polarity and luminogen aggregation are developed through taking advantage of twisted intramolecular charge transfer (TICT) and aggregation-induced emission (AIE) processes as discussed by the authors.
Journal ArticleDOI
A transferable model for singlet-fission kinetics
Shane R. Yost,Jiye Lee,Mark W. Wilson,Tony C. Wu,David P. McMahon,Rebecca R. Parkhurst,Nicholas J. Thompson,Daniel N. Congreve,Akshay Rao,Kerr Johnson,Matthew Y. Sfeir,Moungi G. Bawendi,Timothy M. Swager,Richard H. Friend,Marc A. Baldo,Troy Van Voorhis +15 more
TL;DR: This work lays the foundation for tailoring molecular properties like solubility and energy level alignment while maintaining the high fission yield required for photovoltaic applications.
References
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Organic Thin Film Transistors for Large Area Electronics
TL;DR: In this article, the authors present new insight into conduction mechanisms and performance characteristics, as well as opportunities for modeling properties of organic thin-film transistors (OTFTs) and discuss progress in the growing field of n-type OTFTs.
Journal ArticleDOI
Elastomeric Transistor Stamps: Reversible Probing of Charge Transport in Organic Crystals
Vikram C. Sundar,Jana Zaumseil,Vitaly Podzorov,Etienne Menard,R. L. Willett,Takao Someya,Michael Gershenson,John A. Rogers +7 more
TL;DR: This method, which eliminates exposure of the fragile organic surface to the hazards of conventional processing, enables fabrication of rubrene transistors with charge carrier mobilities as high as ∼15 cm2/V·s and subthreshold slopes as low as 2nF·V/decade·cm2.
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Tetrathiafulvalenes, oligoacenenes, and their buckminsterfullerene derivatives: the brick and mortar of organic electronics.
Journal ArticleDOI
Functionalized Pentacene: Improved Electronic Properties from Control of Solid-State Order
TL;DR: The preparation of two functionalized pentacene derivatives, and the effect of this functionalization on both the solid-state ordering and the electronic properties of the resulting crystals is reported.