Liquid crystalline organic semiconductors

2019 ◽  
pp. 303-313
Author(s):  
Hiroaki Iino ◽  
Jun-ichi Hanna
Keyword(s):  
Organic Semiconductors ◽  
Liquid Crystalline

Charge-Transport in Crystalline Organic Semiconductors with Liquid Crystalline Order.

ChemInform ◽  
2005 ◽  
Vol 36 (44) ◽  
Author(s):  
Panos Vlachos ◽  
Bassam Mansoor ◽  
Matthew P. Aldred ◽  
Mary O'Neill ◽  
Stephen M. Kelly
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Liquid Crystalline ◽  
Crystalline Order

Surface equilibration mechanism controls the molecular packing of glassy molecular semiconductors at organic interfaces

2021 ◽  
Vol 118 (42) ◽  
pp. e2111988118
Author(s):  
Marie E. Fiori ◽  
Kushal Bagchi ◽  
Michael F. Toney ◽  
M. D. Ediger
Keyword(s):  
Organic Semiconductors ◽  
Physical Vapor Deposition ◽  
Liquid Crystalline ◽  
Glass Structure ◽  
Organic Substrate ◽  
Molecular Packing ◽  
Organic Interfaces ◽  
Superlattice Structures ◽  
Liquid Crystalline Materials ◽  
Underlying Substrate

Glasses prepared by physical vapor deposition (PVD) are anisotropic, and the average molecular orientation can be varied significantly by controlling the deposition conditions. While previous work has characterized the average structure of thick PVD glasses, most experiments are not sensitive to the structure near an underlying substrate or interface. Given the profound influence of the substrate on the growth of crystalline or liquid crystalline materials, an underlying substrate might be expected to substantially alter the structure of a PVD glass, and this near-interface structure is important for the function of organic electronic devices prepared by PVD, such as organic light-emitting diodes. To study molecular packing near buried organic–organic interfaces, we prepare superlattice structures (stacks of 5- or 10-nm layers) of organic semiconductors, Alq3 (Tris-(8-hydroxyquinoline)aluminum) and DSA-Ph (1,4-di-[4-(N,N-diphenyl)amino]styrylbenzene), using PVD. Superlattice structures significantly increase the fraction of the films near buried interfaces, thereby allowing for quantitative characterization of interfacial packing. Remarkably, both X-ray scattering and spectroscopic ellipsometry indicate that the substrate exerts a negligible influence on PVD glass structure. Thus, the surface equilibration mechanism previously advanced for thick films can successfully describe PVD glass structure even within the first monolayer of deposition on an organic substrate.

Novel High-Performance Liquid-Crystalline Organic Semiconductors for Thin-Film Transistors

2009 ◽  
Vol 21 (13) ◽  
pp. 2727-2732 ◽  
Author(s):  
Ping Liu ◽  
Yiliang Wu ◽  
Hualong Pan ◽  
Yuning Li ◽  
Sandra Gardner ◽  
...  
Keyword(s):  
Thin Film ◽  
Organic Semiconductors ◽  
Thin Film Transistors ◽  
High Performance ◽  
Liquid Crystalline

Cross-Linked Liquid-Crystalline Materials − A Possible Strategy to Ordered Organic Semiconductors

2004 ◽  
Vol 16 (22) ◽  
pp. 4286-4291 ◽  
Author(s):  
Jens Barche ◽  
Silvia Janietz ◽  
Marcus Ahles ◽  
Roland Schmechel ◽  
Heinz von Seggern
Keyword(s):  
Organic Semiconductors ◽  
Liquid Crystalline ◽  
Crystalline Materials ◽  
Liquid Crystalline Materials

scholarly journals Design of donor–acceptor star-shaped oligomers for efficient solution-processible organic photovoltaics

2014 ◽  
Vol 174 ◽  
pp. 313-339 ◽  
Author(s):  
S. A. Ponomarenko ◽  
Y. N. Luponosov ◽  
J. Min ◽  
A. N. Solodukhin ◽  
N. M. Surin ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Organic Photovoltaics ◽  
Liquid Crystalline ◽  
Organic Photovoltaic ◽  
Future Perspectives ◽  
Photovoltaic Properties ◽  
Design Synthesis ◽  
Alkyl Groups ◽  
Donor Acceptor ◽  
Successful Approach

This contribution describes recent progress in the design, synthesis and properties of solution-processible star-shaped oligomers and their application in organic photovoltaics. Even though alternative chemistry has been used to design such oligomers, the most successful approach is based on a triphenylamine donor branching center, (oligo)thiophene conjugated spacers and dicyanovinyl acceptor groups. These are mainly amorphous low band-gap organic semiconductors, though crystalline or liquid crystalline ordering can sometimes be realized. It was shown that the solubility, thermal behavior and structure of such molecules in the bulk strongly depend on the presence and position of alkyl groups, as well as on their length. The photovoltaic properties of solution-processed molecules of this type are now approaching 5% which exceeds those of vacuum-sublimed devices. The design rules and future perspectives of this class of organic photovoltaic molecules are discussed.

Charge-transport in crystalline organic semiconductors with liquid crystalline order

2005 ◽  
pp. 2921 ◽  
Author(s):  
Panos Vlachos ◽  
Bassam Mansoor ◽  
Matthew P. Aldred ◽  
Mary O'Neill ◽  
Stephen M. Kelly
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Liquid Crystalline ◽  
Crystalline Order

Intertwined Lamello-Columnar Coassemblies in Liquid-Crystalline Side-Chain Π-Conjugated Polymers: Toward a New Class of Nanostructured Supramolecular Organic Semiconductors

2014 ◽  
Vol 47 (5) ◽  
pp. 1715-1731 ◽  
Author(s):  
Danli Zeng ◽  
Ibtissam Tahar-Djebbar ◽  
Yiming Xiao ◽  
Farid Kameche ◽  
Navaphun Kayunkid ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Organic Semiconductors ◽  
Liquid Crystalline ◽  
Side Chain ◽  
New Class

38.1: Highly Thermally-Stable OFETs Fabricated with Liquid Crystalline Organic Semiconductors

2012 ◽  
Vol 43 (1) ◽  
pp. 497-500 ◽  
Author(s):  
Hiroaki Lino ◽  
Takayuki Usui ◽  
Takeo Kobori ◽  
Jun-ichi Hanna
Keyword(s):  
Organic Semiconductors ◽  
Liquid Crystalline ◽  
Thermally Stable

New liquid crystalline solution processible organic semiconductors and their performance in field effect transistors

2003 ◽  
Author(s):  
Maxim N. Shkunov ◽  
Weimin Zhang ◽  
David Graham ◽  
David Sparrowe ◽  
Martin Heeney ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Field Effect ◽  
Liquid Crystalline ◽  
Field Effect Transistors ◽  
Crystalline Solution
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