Stability evaluation and gate-distance effects on electrolyte-gated organic field-effect transistor based on organic semiconductors

2018 ◽  
Author(s):  
Emil J. W. List-Kratochvil ◽  
Giovani Ligorio ◽  
Hugo José N. P. Dias Mello ◽  
Simon Dalgleish ◽  
Marcelo Mulato
Keyword(s):  
Organic Semiconductors ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Stability Evaluation ◽  
Organic Field Effect Transistor ◽  
Distance Effects ◽  
Effect Transistor

On Razors Edge: Influence of the Source Insulator Edge on the Charge Transport of Vertical Organic Field Effect Transistors

MRS Advances ◽  
2017 ◽  
Vol 2 (23) ◽  
pp. 1249-1257 ◽  
Author(s):  
F. Michael Sawatzki ◽  
Alrun A. Hauke ◽  
Duy Hai Doan ◽  
Peter Formanek ◽  
Daniel Kasemann ◽  
...  
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Organic Solar Cells ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Field Effect Transistors ◽  
Electrical Power ◽  
Strong Impact ◽  
Organic Field Effect Transistor ◽  
Effect Transistor

ABSTRACTTo benefit from the many advantages of organic semiconductors like flexibility, transparency, and small thickness, electronic devices should be entirely made from organic materials. This means, additionally to organic LEDs, organic solar cells, and organic sensors, we need organic transistors to amplify, process, and control signals and electrical power. The standard lateral organic field effect transistor (OFET) does not offer the necessary performance for many of these applications. One promising candidate for solving this problem is the vertical organic field effect transistor (VOFET). In addition to the altered structure of the electrodes, the VOFET has one additional part compared to the OFET – the source-insulator. However, the influence of the used material, the size, and geometry of this insulator on the behavior of the transistor has not yet been examined. We investigate key-parameters of the VOFET with different source insulator materials and geometries. We also present transmission electron microscopy (TEM) images of the edge area. Additionally, we investigate the charge transport in such devices using drift-diffusion simulations and the concept of a vertical organic light emitting transistor (VOLET). The VOLET is a VOFET with an embedded OLED. It allows the tracking of the local current density by measuring the light intensity distribution.We show that the insulator material and thickness only have a small influence on the performance, while there is a strong impact by the insulator geometry – mainly the overlap of the insulator into the channel. By tuning this overlap, on/off-ratios of 9x105 without contact doping are possible.

Effect of thiophene/furan substitution on organic field effect transistor properties of arylthiadiazole based organic semiconductors

2020 ◽  
Vol 8 (48) ◽  
pp. 17297-17306
Author(s):  
Anna Pachariyangkun ◽  
Masayuki Suda ◽  
Sarinya Hadsadee ◽  
Siriporn Jungsuttiwong ◽  
Phattananawee Nalaoh ◽  
...  
Keyword(s):  
Charge Transport ◽  
Transport Properties ◽  
Organic Semiconductors ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Organic Field Effect Transistor ◽  
Channel Layer ◽  
Effect Transistor

This study determines that furan could display comparable charge transport properties to its thiophene analogue. The OFET device employing furan-substituted benzothiadiazole as the channel layer showed a mobility (μmax) of 0.0122 cm2 V−1 s−1.

scholarly journals Multi-functional organic field effect transistor based on a dual doped P3HT

2021 ◽  
Vol 8 (5) ◽  
pp. 823-835
Author(s):  
Thomas Debesay ◽  
◽  
Sam-Shajing Sun ◽  
Messaoud Bahoura ◽  
◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Organic Semiconductors ◽  
Active Layer ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Electrical Characterization ◽  
Charge Carrier Mobility ◽  
Organic Field Effect Transistor ◽  
Effect Transistor ◽  
The Impact

<abstract> <p>A dual doped regio-regular poly(3-hexylthiophene-2, 5-diyl) (P3HT) was investigated to develop a multi-functional organic field effect transistor (OFET). OFETs based on a pristine P3HT and a dual doped P3HT (P3HT:PCBM:I<sub>2</sub> blend) were fabricated to study the impact of doping on the electrical properties of the samples, and to examine the mechanism through which it amplified the output performance of the doped OFETs. A series of experimental techniques such as device electrical characterization, active layer surface analysis, and photon absorptivity measurements were conducted to quantitatively characterize the principal parameters that are susceptible to change as a result of doping. Topographic mapping revealed the expected doping-induced improvements in surface morphology, which could be associated with the ability of iodine to improve interdigitation between adjacent P3HT chains. Similarly, absorption spectra showed a 3 nm red-shift of the light absorbance spectrum of the doped samples compared to the undoped samples. The electrical conductivity of the samples was also examined at various conditions of temperature and light intensity, and the values obtained from the doped sample were approximately one order of magnitude higher compared to those of the undoped sample at room temperature, which explains the reason behind the higher output current drawn from the doped device compared to that of the undoped OFET. The explanation for this is two-fold, both PCBM and iodine promote the generation of free charge carriers, which increases the electrical conductivity of the active layer; and in addition to that, the improved P3HT main-chain interdigitation brought about by the introduction of iodine results in an increase in charge-carrier mobility, which also results in higher electrical conductivity. The findings of this study offers valuable information that could be instrumental in further advancing the future organic semiconductors based studies.</p> </abstract>

Spatial Extent of Interaction between Excitons and Polarons in a Bilayer Organic Field-Effect Transistor

ACS Photonics ◽  
2021 ◽  
Author(s):  
Haripriya Kesavan ◽  
Subhamoy Sahoo ◽  
Sanjoy Jena ◽  
Jayeeta Bhattacharyya ◽  
Debdutta Ray
Keyword(s):  
Field Effect ◽  
Field Effect Transistor ◽  
Spatial Extent ◽  
Organic Field Effect Transistor ◽  
Effect Transistor

Theoretical Insights on Tunable Optoelectronics and Charge Mobilities in Cyano-Perylenediimides: Interplays between -CN Numbers and Positions

2021 ◽  
Author(s):  
Raka Ahmed ◽  
Arun Manna
Keyword(s):  
Field Effect ◽  
Field Effect Transistor ◽  
Organic Field Effect Transistor ◽  
Research Attention ◽  
Effect Transistor ◽  
Potential Use

Air-stable perylenediimide (PDI) and its derivatives, in particularly the cyano-functionalized ones have attracted great research attention for their potential use in flexible optoelectronics, organic field-effect-transistor (OFET) as n-type transport materials...

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