Intramolecular Charge Carrier Mobility in Fluorene-Thiophene Copolymer Films Studied by Microwave Conductivity

2011 ◽  
Vol 44 (9) ◽  
pp. 3416-3424 ◽  
Author(s):  
Akinori Saeki ◽  
Takahiro Fukumatsu ◽  
Shu Seki
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Microwave Conductivity ◽  
Copolymer Films

Modulation and evaluation of the charge carrier mobility in a polymer alloy of polythiophene and an insulating matrix with an electron accepting molecule

2015 ◽  
Vol 6 (32) ◽  
pp. 5860-5868 ◽  
Author(s):  
Takahiro Fukumatsu ◽  
Akinori Saeki ◽  
Shu Seki
Keyword(s):  
Charge Carrier ◽  
Absorption Spectroscopy ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Direct Access ◽  
Microwave Conductivity ◽  
Time Resolved ◽  
Polymer Alloy ◽  
Contact Measurements

Non-contact measurements with time-resolved microwave conductivity and absorption spectroscopy offer direct access to the charge carrier mobility in conjugated backbones.

The Influence of Nitrogen Position on Charge Carrier Mobility in Enantiopure Aza[6]helicene Crystals

2018 ◽  
Author(s):  
Francesco Salerno ◽  
Beth Rice ◽  
Julia Schmidt ◽  
Matthew J. Fuchter ◽  
Jenny Nelson ◽  
...  
Keyword(s):  
Solid State ◽  
Charge Carrier ◽  
Carrier Mobility ◽  
Chemical Structure ◽  
Crystal Packing ◽  
Charge Carrier Mobility ◽  
Individual Factor ◽  
Charge Mobility ◽  
Order Of Magnitude ◽  
Small Change

<p>The properties of an organic semiconductor are dependent on both the chemical structure of the molecule involved, and how it is arranged in the solid-state. It is challenging to extract the influence of each individual factor, as small changes in the molecular structure often dramatically change the crystal packing and hence solid-state structure. Here, we use calculations to explore the influence of the nitrogen position on the charge mobility of a chiral organic molecule when the crystal packing is kept constant. The transfer integrals for a series of enantiopure aza[6]helicene crystals sharing the same packing were analysed in order to identify the best supramolecular motifs to promote charge carrier mobility. The regioisomers considered differ only in the positioning of the nitrogen atom in the aromatic scaffold. The simulations showed that even this small change in the chemical structure has a strong effect on the charge transport in the crystal, leading to differences in charge mobility of up to one order of magnitude. Some aza[6]helicene isomers that were packed interlocked with each other showed high HOMO-HOMO integrals (up to 70 meV), whilst molecules arranged with translational symmetry generally afforded the highest LUMO-LUMO integrals (40 - 70 meV). As many of the results are not intuitively obvious, a computational approach provides additional insight into the design of new semiconducting organic materials.</p>

Assembly effect on the charge carrier mobility in quaterthiophene-based n/p-materials

2019 ◽  
Vol 7 (22) ◽  
pp. 6649-6655
Author(s):  
A. López-Andarias ◽  
C. Atienza ◽  
J. López-Andarias ◽  
W. Matsuda ◽  
T. Sakurai ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Self Assembly ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Assembly Process ◽  
Charge Mobility

Effect of the peptide-based quaterthiophene self-assembly process on the charge mobility properties of the n/p-materials formed is studied.

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