scholarly journals Nanodielectrics approaches to low-voltage organic transistors and circuits

2020 ◽  
Vol 91 (2) ◽  
pp. 20201 ◽  
Author(s):  
Seunghyuk Lee ◽  
Heesung Han ◽  
Chang-Hyun Kim

In this review, advances in nanoscale dielectric materials for organic field-effect transistors (OFETs) are summarized. OFETs are highly promising device units for ultra-thin, light-weight, flexible, and wearable electronics systems, while the operating voltages of the reported devices are in many cases much higher than what is relevant to modern technological applications. Key aspects behind this issue are clarified in terms of basic transistor device physics, which translate into the important motivations for realizing nanodielectric-based low-voltage OFETs. Different possibilities of a device design are explained in detail by introducing important recent publications on each material class. Finally, several forward-looking remarks on the integration of nanodielectrics into next-generation OFETs are provided.

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Yuhao Shi ◽  
Yingkai Zheng ◽  
Jialiang Wang ◽  
Ran Zhao ◽  
Tao Wang ◽  
...  

Organic field-effect transistors (OFETs) are of the core units in organic electronic circuits, and the performance of OFETs replies critically on the properties of their dielectric layers. Owing to the intrinsic flexibility and natural compatibility with other organic components, organic polymers, such as poly(vinyl alcohol) (PVA), have emerged as highly interesting dielectric materials for OFETs. However, unsatisfactory issues, such as hysteresis, high subthreshold swing, and low effective carrier mobility, still considerably limit the practical applications of the polymer-dielectric OFETs for high-speed, low-voltage flexible organic circuits. This work develops a new approach of using supercritical CO2 fluid (SCCO2) treatment on PVA dielectrics to achieve remarkably high-performance polymer-dielectric OFETs. The SCCO2 treatment is able to completely eliminate the hysteresis in the transfer characteristics of OFETs, and it can also significantly reduce the device subthreshold slope to 0.25 V/dec and enhance the saturation regime carrier mobility to 30.2 cm2 V−1 s−1, of which both the numbers are remarkable for flexible polymer-dielectric OFETs. It is further demonstrated that, coupling with an organic light-emitting diode (OLED), the SCCO2-treated OFET is able to function very well under fast switching speed, which indicates that an excellent switching behavior of polymer-dielectric OFETs can be enabled by this SCCO2 approach. Considering the broad and essential applications of OFETs, we envision that this SCCO2 technology will have a very broad spectrum of applications for organic electronics, especially for high refresh rate and low-voltage flexible display devices.


2013 ◽  
Vol 26 (2) ◽  
pp. 288-292 ◽  
Author(s):  
Mi Jang ◽  
Ji Hoon Park ◽  
Seongil Im ◽  
Se Hyun Kim ◽  
Hoichang Yang

2019 ◽  
Vol 65 ◽  
pp. 259-265 ◽  
Author(s):  
Haifeng Ling ◽  
Dequn Wu ◽  
Tao Wang ◽  
Xudong Chen ◽  
Mingdong Yi ◽  
...  

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