scholarly journals Self-Assembly Polymorphism of Regioisomeric Diketopyrrolopyrrole-Based π-Conjugated Organic Semiconductors

2019 ◽  
Vol 123 (2) ◽  
pp. 1185-1193 ◽  
Author(s):  
Xinrui Miao ◽  
Jinxing Li ◽  
Lei Ying ◽  
Fabien Silly ◽  
Chunshan Che ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Self Assembly ◽  
Conjugated Organic Semiconductors

Fused Ambipolar Aza-isoindigos with NIR absorption

2021 ◽  
Author(s):  
Liping Yao ◽  
Danlei Zhu ◽  
Hailiang Liao ◽  
Sheik Haseena ◽  
Mahesh kumar Ravva ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
High Performance ◽  
Low Cost ◽  
Light Weight ◽  
The Past ◽  
Pi Conjugated ◽  
Nir Absorption ◽  
Conjugated Organic Semiconductors

Due to their advantages of low-cost, light-weight, and mechanical flexibility, much attention has been focused on pi-conjugated organic semiconductors. In the past decade, although many materials with high performance has...

scholarly journals STM study on the self-assembly of oligothiophene-based organic semiconductors

2011 ◽  
Vol 2 ◽  
pp. 802-808 ◽  
Author(s):  
Elena Mena-Osteritz ◽  
Marta Urdanpilleta ◽  
Erwaa El-Hosseiny ◽  
Berndt Koslowski ◽  
Paul Ziemann ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Self Assembly ◽  
Theoretical Calculations ◽  
The Self ◽  
Scanning Tunneling ◽  
Ambient Conditions ◽  
Tunneling Microscopy ◽  
Substitution Pattern ◽  
Electronic Density ◽  
The Individual

The self-assembly properties of a series of functionalized regioregular oligo(3-alkylthiophenes) were investigated by using scanning tunneling microscopy (STM) at the liquid–solid interface under ambient conditions. The characteristics of the 2-D crystals formed on the (0001) plane of highly ordered pyrolitic graphite (HOPG) strongly depend on the length of the π-conjugated oligomer backbone, on the functional groups attached to it, and on the alkyl substitution pattern on the individual thiophene units. Theoretical calculations were performed to analyze the geometry and electronic density of the molecular orbitals as well as to analyze the intermolecular interactions, in order to obtain models of the 2-D molecular ordering on the substrate.

Recent Advances in the Computational Characterization of π-Conjugated Organic Semiconductors

2019 ◽  
pp. 37-106
Author(s):  
Jean-Luc Bredas ◽  
Xiankai Chen ◽  
Thomas Körzdörfer ◽  
Hong Li ◽  
Chad Risko ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Recent Advances ◽  
Conjugated Organic Semiconductors

Soft template assisted self-assembly: a general strategy toward two-dimensional molecular crystals for high-performance organic field-effect transistors

2022 ◽  
Author(s):  
Xinzi Tian ◽  
Jiarong Yao ◽  
Siyu Guo ◽  
Zhaofeng Wang ◽  
Yanling Xiao ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Self Assembly ◽  
High Performance ◽  
Field Effect Transistors ◽  
Molecular Crystals ◽  
Soft Template ◽  
General Strategy ◽  
Two Dimensional ◽  
Organic Field Effect Transistors ◽  
Intrinsic Properties

Two-dimensional molecular crystals (2DMCs) are highly desirable to probe the intrinsic properties in organic semiconductors and are promising candidates for constructing high-performance optoelectronic devices. Liquids such as water are favorable...

Facile synthesis and self-assembly of diazafluorenone-based p–n (donor–acceptor) organic semiconductors

Tetrahedron ◽  
2012 ◽  
Vol 68 (39) ◽  
pp. 8216-8221 ◽  
Author(s):  
Wei-Jie Li ◽  
Hai-Mei Wu ◽  
Yi-Bao Li ◽  
Chao-Peng Hu ◽  
Ming-Dong Yi ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Self Assembly ◽  
Facile Synthesis ◽  
Donor Acceptor

Control of the Mesoscopic Organization of Conjugated Thiophene Oligomers, Induced by Self-Assembly Properties

1993 ◽  
Vol 328 ◽  
Author(s):  
Francis Garnier ◽  
A. Yassar ◽  
R. Hajlaoui ◽  
G. Horowitz ◽  
F. Deloffre
Keyword(s):  
Structural Properties ◽  
Organic Semiconductors ◽  
Self Assembly ◽  
Field Effect Transistors ◽  
Charge Carrier Mobility ◽  
Molecular Engineering ◽  
Molecular Organization ◽  
Conjugated Oligomers ◽  
Planar Molecules ◽  
Mesoscopic Level

ABSTRACTConjugated oligomers form a fascinating class of molecular semiconductors, which open the perspective of control of electronic and structural properties through the variation of their chemical structure. For analysing the correlation between charge transport and structural properties, sexithiophene, 6T, was substituted by hexyl groups, both on the terminal α positions (α,ωDH6T) and as pendant groups in β position (β,β′DH6T). Structural characterizations by X-ray diffraction show that vacuum evaporated thin films of 6T and α,ωDH6T consist of layered structure in a monoclinic arrangement, with all-planar Molecules standing on the substrate, and that a much longer range ordering is observed when passing from 6T to α,ωDH6T, evidencing a large increase of molecular organization at the mesoscopic level. Electrical characterizations also indicate a significant enhancement of anisotropy of conductivity, with a ratio of 120 in favor of the conductivity along the stacking axis for α,ωDH6T. The charge carrier mobility, measured on field-effect transistors fabricated from these conjugated oligomers, also shows a large increase by a factor of 25 when passing from 6T to α,ωDH6T, and reaches a value close to 10-1cm2V-1s-1. In contrast, ββ′DH6T presents very low conductivity and mobility. These observations are attributed to the self-assembly properties brought by alkyl groups in α,ω position, and confirm the large potential of molecular engineering of organic semiconductors.

scholarly journals Hydrogen-Bonded Conjugated Materials and Their Application in Organic Field-Effect Transistors

2021 ◽  
Vol 9 ◽  
Author(s):  
Xin Shi ◽  
Weiwei Bao
Keyword(s):  
Organic Semiconductors ◽  
Self Assembly ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
Conjugated Materials ◽  
Chemical Structures ◽  
Simple Strategy ◽  
Stacking Order ◽  
Hydrogen Bonded

Recent research on organic semiconductors has revealed that the composition of the constituent organic material, as well as the subtle changes in its structure (the stacking order of molecules), can noticeably affect its bulk properties. One of the reasons for this is that the charge transport in conjugated materials is strongly affected by their structure. Further, the charge mobility increases significantly when the conjugated materials exhibit self-assembly, resulting in the formation of ordered structures. However, well-organized nanostructures are difficult to obtain using classical solution processing methods, owing to their disordered state. A simple strategy for obtaining well-ordered material films involves synthesizing new conjugated materials that can self-organize. Introducing hydrogen bonding in the materials to yield hydrogen-bonded material superstructures can be a suitable method to fulfill these critical requirements. The formed hydrogen bonds will facilitate the assembly of the molecules into a highly ordered structure and bridge the distance between the adjacent molecules, thus enhancing the intermolecular charge transfer. In this minireview, hydrogen-bonded small molecules and polymers as well as the relationship between their chemical structures and performances in organic field-effect transistors are discussed.

The effect of side-chain length on the microstructure and processing window of zone-cast naphthalene-based bispentalenes

2019 ◽  
Vol 7 (43) ◽  
pp. 13493-13501 ◽  
Author(s):  
Katelyn P. Goetz ◽  
Kohei Sekine ◽  
Fabian Paulus ◽  
Yu Zhong ◽  
Daniel Roth ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thin Films ◽  
Charge Carrier ◽  
Organic Semiconductors ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Side Chain ◽  
Processing Window ◽  
Conjugated Organic Semiconductors ◽  
Structure And Microstructure

The solubilizing side-groups of solution-processable π-conjugated organic semiconductors affect both the crystal structure and microstructure of the respective thin films and thus charge-carrier mobility in devices.

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