Space charge layers in organic field-effect transistors with Gaussian or exponential semiconductor density of states

2007 ◽  
Vol 101 (2) ◽  
pp. 024514 ◽  
Author(s):  
G. Paasch ◽  
S. Scheinert
Keyword(s):  
Space Charge ◽  
Density Of States ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors

Tuning the Threshold Voltage in Organic Field Effect Transistors by Space Charge Polarization of Gate Dielectrics

2009 ◽  
Vol 1154 ◽  
Author(s):  
Heisuke Sakai ◽  
Koudai Konno ◽  
Hideyuki Murata
Keyword(s):  
Space Charge ◽  
Active Layer ◽  
Threshold Voltage ◽  
Field Effect ◽  
Gate Dielectrics ◽  
Field Effect Transistors ◽  
Space Charge Polarization ◽  
Chemical Doping ◽  
Organic Field Effect Transistors ◽  
Charge Polarization

AbstractStudies of gate dielectrics in organic field effect transistors (OFETs) have been attractive because the electric properties of OFETs are susceptibly affected by the choice of the gate dielectrics. Here, we demonstrate a tunable threshold voltage in an organic field effect transistor (OFET) using an ion-dispersed gate dielectrics. By applying external electric field (Vex) to the gate dielectrics, the dispersed ions in the gate dielectrics are separated by electrophoresis and form space charge polarization. The drain current of the OFET increased over 1.9 times and the threshold voltage (Vth) decreased 22 V (from -35.1 V to -13.1 V).The shift direction of Vth was easily tuned by the polarity of the external voltage. The dielectric permittivity of the gate dielectrics and mobility of the active layer were unchanged after the polarization of the gate dielectrics. The UV-VIS differential absorption spectra of the OFETs indicate that there is no chemical doping in the active layer of the OFETs. These results indicated the shifts of threshold voltages were originated from the polarization of gate dielectrics.

scholarly journals Biorecognition in Organic Field Effect Transistors Biosensors: The Role of the Density of States of the Organic Semiconductor

2016 ◽  
Vol 88 (24) ◽  
pp. 12330-12338 ◽  
Author(s):  
Marcello Berto ◽  
Stefano Casalini ◽  
Michele Di Lauro ◽  
Simone L. Marasso ◽  
Matteo Cocuzza ◽  
...  
Keyword(s):  
Density Of States ◽  
Organic Semiconductor ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors
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