Intrinsic charge-mobility in benzothieno[3,2-b][1]benzothiophene (BTBT) organic semiconductors is enhanced with long alkyl side-chains

2018 ◽  
Vol 20 (23) ◽  
pp. 15970-15979 ◽  
Author(s):  
M. Alkan ◽  
I. Yavuz
Keyword(s):  
Charge Carrier ◽  
Organic Semiconductors ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Side Chains ◽  
Charge Mobility ◽  
Structural Order ◽  
Alkyl Side Chains

Longer alkyl side-chains in BTBTs regulate structural order, cause balanced transport and lead to enhanced intrinsic charge-carrier mobility.

scholarly journals Remarkable enhancement of charge carrier mobility of conjugated polymer field-effect transistors upon incorporating an ionic additive

2016 ◽  
Vol 2 (5) ◽  
pp. e1600076 ◽  
Author(s):  
Hewei Luo ◽  
Chenmin Yu ◽  
Zitong Liu ◽  
Guanxin Zhang ◽  
Hua Geng ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Carrier ◽  
Conjugated Polymer ◽  
Carrier Mobility ◽  
Field Effect Transistors ◽  
Theoretical Calculations ◽  
Charge Carrier Mobility ◽  
Side Chains ◽  
Alkyl Side Chains ◽  
Ionic Additive

Organic semiconductors with high charge carrier mobilities are crucial for flexible electronic applications. Apart from designing new conjugated frameworks, different strategies have been explored to increase charge carrier mobilities. We report a new and simple approach to enhancing the charge carrier mobility of DPP-thieno[3,2-b]thiophene–conjugated polymer by incorporating an ionic additive, tetramethylammonium iodide, without extra treatments into the polymer. The resulting thin films exhibit a very high hole mobility, which is higher by a factor of 24 than that of thin films without the ionic additive under the same conditions. On the basis of spectroscopic grazing incidence wide-angle x-ray scattering and atomic force microscopy studies as well as theoretical calculations, the remarkable enhancement of charge mobility upon addition of tetramethylammonium iodide is attributed primarily to an inhibition of the torsion of the alkyl side chains by the presence of the ionic species, facilitating a more ordered lamellar packing of the alkyl side chains and interchain π-π interactions.

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.

Spectroscopic Assessment of Charge‐Carrier Mobility in Crystalline Organic Semiconductors

2021 ◽  
pp. 2100579
Author(s):  
Oleg G. Kharlanov ◽  
Dmitry R. Maslennikov ◽  
Elizaveta V. Feldman ◽  
George G. Abashev ◽  
Oleg V. Borshchev ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Organic Semiconductors ◽  
Carrier Mobility ◽  
Charge Carrier Mobility

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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