Real-time monitoring of trap dynamics reveals the electronic states that limit charge transport in crystalline organic semiconductors

2020 ◽  
Vol 7 (9) ◽  
pp. 2390-2398
Author(s):  
Hamna F. Iqbal ◽  
Emma K. Holland ◽  
John E. Anthony ◽  
Oana D. Jurchescu
Keyword(s):  
Thin Film ◽  
Charge Transport ◽  
Real Time ◽  
Organic Semiconductors ◽  
Thin Film Transistors ◽  
Electronic States ◽  
Organic Thin Film Transistors ◽  
Organic Thin Film ◽  
Real Time Monitoring

Access to the dynamics of trap annihilation/generation resulting from isomer rearrangement identifies the performance-limiting processes in organic thin-film transistors.

What could be the Highest Hopping Mobility in Organic Thin-Film Transistors?

MRS Advances ◽  
2016 ◽  
Vol 1 (38) ◽  
pp. 2659-2664
Author(s):  
Varsha Rani ◽  
Akanksha Sharma ◽  
Subhasis Ghosh
Keyword(s):  
Thin Film ◽  
Charge Transport ◽  
Transport Properties ◽  
Thin Film Transistors ◽  
Weak Coupling ◽  
Theoretical Study ◽  
Schottky Diodes ◽  
Organic Thin Film Transistors ◽  
Electronic Coupling ◽  
Organic Thin Film

ABSTRACTCharge transport properties of pentacene have been investigated by a joint experimental and theoretical study. The growth of pentacene on the substrates shows mainly two different polymorphic phases, a bulk phase and a thin-film phase. The thin-film phase is crucial for the charge transport in two-terminal and three-terminal devices such as organic Schottky diodes and organic thin film transistors, respectively. Experimentally, mobility in two-terminal devices is less by five orders of magnitude than that in three-terminal devices. We show here that this difference can be explained on the basis of strong electronic coupling between molecular dimers located in the ab-plane and relatively weak coupling between the planes (along the c-axis).

scholarly journals Effect of Processing Parameters on Performance of Spray-Deposited Organic Thin-Film Transistors

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Jack W. Owen ◽  
Natalia A. Azarova ◽  
Marsha A. Loth ◽  
Markos Paradinas ◽  
Mariona Coll ◽  
...  
Keyword(s):  
Thin Film ◽  
Organic Semiconductors ◽  
Thin Film Transistors ◽  
Spray Deposition ◽  
Scanning Force Microscopy ◽  
Processing Parameters ◽  
Organic Thin Film Transistors ◽  
Organic Thin Film ◽  
Fabrication Procedure ◽  
Scanning Force

The performance of organic thin-film transistors (OTFTs) is often strongly dependent on the fabrication procedure. In this study, we fabricate OTFTs of soluble small-molecule organic semiconductors by spray-deposition and explore the effect of processing parameters on film morphology and device mobility. In particular, we report on the effect of the nature of solvent, the pressure of the carrier gas used in deposition, and the spraying distance. We investigate the surface morphology using scanning force microscopy and show that the molecules pack along theπ-stacking direction, which is the preferred charge transport direction. Our results demonstrate that we can tune the field-effect mobility of spray-deposited devices two orders of magnitude, from 10−3 cm2/Vs to 10−1 cm2/Vs, by controlling fabrication parameters.

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