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.

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 Orientation analysis of pentacene molecules in organic field-effect transistor devices using polarization-dependent Raman spectroscopy

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Bishwajeet Singh Bhardwaj ◽  
Takeshi Sugiyama ◽  
Naoko Namba ◽  
Takayuki Umakoshi ◽  
Takafumi Uemura ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Charge Carrier ◽  
Molecular Orientation ◽  
Field Effect ◽  
High Performance ◽  
Carrier Mobility ◽  
Field Effect Transistors ◽  
Charge Carrier Mobility ◽  
Orientation Distribution ◽  
High Resolution Technique

Abstract Pentacene, an organic molecule, is a promising material for high-performance field effect transistors due to its high charge carrier mobility in comparison to usual semiconductors. However, the charge carrier mobility is strongly dependent on the molecular orientation of pentacene in the active layer of the device, which is hard to investigate using standard techniques in a real device. Raman scattering, on the other hand, is a high-resolution technique that is sensitive to the molecular orientation. In this work, we investigated the orientation distribution of pentacene molecules in actual transistor devices by polarization-dependent Raman spectroscopy and correlated these results with the performance of the device. This study can be utilized to understand the distribution of molecular orientation of pentacene in various electronic devices and thus would help in further improving their performances.

Isoindigo-based polymer field-effect transistors: effects of selenophene-substitution on high charge carrier mobility

2015 ◽  
Vol 51 (38) ◽  
pp. 8120-8122 ◽  
Author(s):  
Kwang Hun Park ◽  
Kwang Hee Cheon ◽  
Yun-Ji Lee ◽  
Dae Sung Chung ◽  
Soon-Ki Kwon ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Field Effect ◽  
Carrier Mobility ◽  
Field Effect Transistors ◽  
Charge Carrier Mobility ◽  
High Charge ◽  
Crystalline Order ◽  
High Charge Carrier Mobility

The selenophene-substitution can lead to a higher crystalline order as well as a high charge carrier mobility in isoindigo-based polymers.

Temperature-Dependent Ambipolar Charge Carrier Mobility in Large-Crystal Hybrid Halide Perovskite Thin Films

2019 ◽  
Vol 11 (23) ◽  
pp. 20838-20844 ◽  
Author(s):  
Alexander Biewald ◽  
Nadja Giesbrecht ◽  
Thomas Bein ◽  
Pablo Docampo ◽  
Achim Hartschuh ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Carrier ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Temperature Dependent ◽  
Large Crystal ◽  
Halide Perovskite

Dianthraceno[a,e]pentalenes: synthesis, crystallographic structures and applications in organic field-effect transistors

2015 ◽  
Vol 51 (3) ◽  
pp. 503-506 ◽  
Author(s):  
Gaole Dai ◽  
Jingjing Chang ◽  
Wenhua Zhang ◽  
Shiqiang Bai ◽  
Kuo-Wei Huang ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Field Effect ◽  
Carrier Mobility ◽  
Field Effect Transistors ◽  
Charge Carrier Mobility ◽  
Dense Packing ◽  
Organic Field Effect Transistors ◽  
High Charge ◽  
Crystallographic Structures ◽  
High Charge Carrier Mobility

Two stable dianthraceno[a,e]pentalenes were synthesized and DAP2 exhibited a high charge carrier mobility of 0.65 cm2 V−1 s−1 due to its dense packing.

Design Rules to Maximize Charge-Carrier Mobility along Conjugated Polymer Chains

2020 ◽  
Vol 11 (16) ◽  
pp. 6519-6525
Author(s):  
Suryoday Prodhan ◽  
Jing Qiu ◽  
Matteo Ricci ◽  
Otello M. Roscioni ◽  
Linjun Wang ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Conjugated Polymer ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Polymer Chains ◽  
Design Rules ◽  
Conjugated Polymer Chains

New π-conjugated thieno[3,2-b]indole derivatives and charge carrier mobility in their thin films

2019 ◽  
Vol 68 (6) ◽  
pp. 1204-1207 ◽  
Author(s):  
A. E. Alexandrov ◽  
A. R. Tameev ◽  
A. S. Steparuk ◽  
R. A. Irgashev ◽  
G. L. Rusinov
Keyword(s):  
Thin Films ◽  
Charge Carrier ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Indole Derivatives

Effect of Film Morphology on Charge Transport in C60-based Organic Field Effect Transistors

2010 ◽  
Vol 1270 ◽  
Author(s):  
Mujeeb Ullah ◽  
Andrey K. Kadashchuk ◽  
Philipp Stadler ◽  
Alexander Kharchenko ◽  
Almantas Pivrikas ◽  
...  
Keyword(s):  
Grain Size ◽  
Charge Carrier ◽  
Substrate Temperature ◽  
Charge Transport ◽  
Field Effect ◽  
Carrier Mobility ◽  
Field Effect Transistors ◽  
Charge Carrier Mobility ◽  
Film Morphology ◽  
Organic Field Effect Transistors

AbstractThe critical factor that limits the efficiencies of organic electronic devices is the low charge carrier mobility which is attributed to disorder in organic films. In this work we study the effects of active film morphology on the charge transport in Organic Field Effect Transistors (OFETs). We fabricated the OFETs using different substrate temperature to grow different morphologies of C60 films by Hot Wall Epitaxy. Atomic Force Microscopy images and XRD results showed increasing grain size with increasing substrate temperature. An increase in field effect mobility was observed for different OFETs with increasing grain size in C60 films. The temperature dependence of charge carrier mobility in these devices followed the empirical relation named as Meyer-Neldel Rule and showed different activation energies for films with different degree of disorder. A shift in characteristic Meyer-Neldel energy was observed with changing C60 morphology which can be considered as an energetic disorder parameter.

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