Electrostatic Spray Deposition of Highly-Crystalline TIPS Pentacene Thin Films for Fabrication of Organic Field-Effect Transistors

2012 ◽  
Vol 1501 ◽  
Author(s):  
Norio Onojima ◽  
Hiroki Saito ◽  
Naomichi Nishio ◽  
Takamasa Kato
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Spray Deposition ◽  
Solution Process ◽  
Channel Length ◽  
Organic Films ◽  
Organic Field Effect Transistors ◽  
Electrostatic Spray Deposition ◽  
Promising Solution ◽  
Electrostatic Spray

ABSTRACTThis paper demonstrates that electrostatic spray deposition (ESD) method is a promising solution process to fabricate highly-crystalline organic films (6,13-bis(triisopropylsilylethynyl) pentacene; TIPS pentacene) for the use in bottom-contact organic field-effect transistors (OFETs). We obtained large crystalline domains (i.e., molecularly-oriented domains) by using an o-DCB:acetone mixed solvent (1:1), and observed good transistor behavior in an OFET having the channel length of 20 μm.

scholarly journals Channel length-dependent characterisations of organic thin-film transistors with solution processable gadolinium phthalocyanine derivatives

2019 ◽  
Vol 31 (1) ◽  
pp. 265-273 ◽  
Author(s):  
Seema Barard ◽  
Debdyuti Mukherjee ◽  
Sujoy Sarkar ◽  
T. Kreouzis ◽  
I. Chambrier ◽  
...  
Keyword(s):  
Field Effect ◽  
Liquid Crystalline ◽  
Field Effect Transistors ◽  
Channel Length ◽  
Organic Field Effect Transistors ◽  
Organic Thin Film ◽  
Active Layers ◽  
Order Of Magnitude ◽  
Scaling Down ◽  
Voltage Swing

AbstractSpin-coated 52-nm-thick films of newly synthesised gadolinium liquid crystalline bisphthalocyanine sandwich (GdPc2) complexes with octyl chains non-peripheral positions have been successfully employed as active layers for bottom-gate organic field effect transistors having both short $$(5\,\upmu {\text{m}})$$(5μm) and long $$( 20\,\upmu {\text{m}})$$(20μm) channels. The scaling down of the channel length $$( L )$$(L) decreases the field effect mobility due to the increase in the contact resistance between the gold electrodes and the GdPc2 semiconducting layer. Values of on–off ratio and sub-threshold voltage swing are higher nearly one order of magnitude for $$L = 5 \,\upmu{\text{ m}}$$L=5μm than those for $$L = 20\;\upmu m$$L=20μm.

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