Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Increased Static Charge–Induced Threshold Voltage Shifts and Memristor Activity in Pentacene OFETs Comprising Polystyrene–Based Gate Dielectrics Containing Electroactive Small Molecule Crystallites

Journal Article · · Advanced Functional Materials
 [1];  [2];  [3]
  1. Department of Materials Science and Engineering Johns Hopkins University Baltimore MD 21218 USA; Johns Hopkins University
  2. Department of Physics and Astronomy Johns Hopkins University Baltimore MD 21218 USA
  3. Department of Materials Science and Engineering Johns Hopkins University Baltimore MD 21218 USA
Top-contact bottom-gate pentacene OFETs are fabricated with single layer dielectrics comprised of either polystyrene (PS), poly(4-methylstyrene) (P4MS), or poly(4-tert-butylstyrene) (P4TBS). The polystyrenes are blended with varying concentrations of two different small molecules, dibenzotetrathiafulvalene (DBTTF) and 2,8-difluoro-5,11-bis(triethylsilylethynyl)anthradithiophene (diF-TES-ADT), to form small, separated crystallites contained throughout the polymer dielectric layer. The OFET characteristics of these devices are investigated and their threshold voltage shifts are measured after –70 V static charging for 5 min. Two-terminal measurements are conducted using multiple different gate biases in the range of –50 to +50 V to investigate memristor behavior in the devices. OFETs containing DBTTF exhibited ΔVth increases as large as 330% relative to control OFETs containing no DBTTF, while OFETs containing at least 7.5 wt.% DBTTF exhibited memristor activity, with currents ranging from 20 nA to 44 µA depending on the applied bias. Furthermore, this work demonstrates that including small, separated crystallites in polymer dielectrics enhances their charge storage ability and can be promising for creating nonbinary memory devices for data processing. Additionally, the observed memristor activity indicates the OFETs in this work can be used in development of neuromorphic systems that aim to mimic the synaptic behavior of the human nervous system.
Research Organization:
Johns Hopkins University, Baltimore, MD (United States)
Sponsoring Organization:
Office of Naval Research (ONR); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-07ER46465
OSTI ID:
2447090
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 52 Vol. 34; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (50)

The Concept of “Threshold Voltage” in Organic Field-Effect Transistors journal August 1998
Vertically Segregated Structure and Properties of Small Molecule-Polymer Blend Semiconductors for Organic Thin-Film Transistors journal August 2012
Microstructural Control of Charge Transport in Organic Blend Thin-Film Transistors journal July 2014
High-Performance Polymer-Small Molecule Blend Organic Transistors journal March 2009
Reliability of Organic Field-Effect Transistors journal October 2009
The Memristive Magnetic Tunnel Junction as a Nanoscopic Synapse‐Neuron System journal January 2012
Bias Stress Effect in “Air-Gap” Organic Field-Effect Transistors journal April 2012
Electrolyte‐Gated Organic Field‐Effect Transistor Based on a Solution Sheared Organic Semiconductor Blend journal October 2016
Elucidating the Role of Water‐Related Traps in the Operation of Polymer Field‐Effect Transistors journal June 2021
Front Cover: Dinaphthotetrathiafulvalene Bisimides: A New Member of the Family of π‐Extended TTF Stable p‐Type Semiconductors (Chem. Eur. J. 60/2017) journal August 2017
Origin of channel/dielectric interfacial trap states modification by ultraviolet irradiation on organic thin-film transistors journal September 2014
Contact resistance extraction in pentacene thin film transistors journal February 2003
Stability of n-type doped conducting polymers and consequences for polymeric microelectronic devices journal February 1997
Threshold voltage shifting for memory and tuning in printed transistor circuits journal May 2011
Solution-processable organic and hybrid gate dielectrics for printed electronics journal May 2018
Experimental demonstration of associative memory with memristive neural networks journal September 2010
Twistable nonvolatile organic resistive memory devices journal August 2013
Flexible nonvolatile organic ferroelectric memory transistors fabricated on polydimethylsiloxane elastomer journal January 2015
Molecular Assembly-Induced Charge Transfer for Programmable Functionalities journal November 2017
Electronic Structure of Polymer Dielectrics: The Role of Chemical and Morphological Complexity journal October 2018
Synthesis, Fabrication, and Heterostructure of Charged, Substituted Polystyrene Multilayer Dielectrics and Their Effects in Pentacene Transistors journal April 2016
Highly Contrasting Static Charging and Bias Stress Effects in Pentacene Transistors with Polystyrene Heterostructures Incorporating Oxidizable N , N ′-Bis(4-methoxyphenyl)aniline Side Chains as Gate Dielectrics journal July 2018
Charge Trapping in Polymer Electrets with Highly Dilute Blended Arylamine Donors journal April 2021
Maximized Hole Trapping in a Polystyrene Transistor Dielectric from a Highly Branched Iminobis(aminoarene) Side Chain journal July 2021
Oligofluorene−Thiophene Derivatives as High-Performance Semiconductors for Organic Thin Film Transistors journal April 2003
Organic Single-Crystal Field-Effect Transistors of a Soluble Anthradithiophene journal November 2008
The Dielectric Constant of Polystyrene Solutions. journal February 1951
High-Performance Organic Field-Effect Transistors Based on π-Extended Tetrathiafulvalene Derivatives journal June 2005
Novel Selenocycle-Fused TTF-Type of Electron Donors Forming Conducting Molecular Complexes:  Bis(ethyleneseleno)tetrathiafulvalene (BES-TTF), Diselenolotetrathiafulvalene (DS-TTF), and Bis(ethyleneseleno)tetraselenafulvalene (BES-TSF) journal November 1998
Nanoscale Memristor Device as Synapse in Neuromorphic Systems journal April 2010
A synaptic model of memory: long-term potentiation in the hippocampus journal January 1993
The missing memristor found journal May 2008
Solution-printed organic semiconductor blends exhibiting transport properties on par with single crystals journal November 2015
A simple and robust approach to reducing contact resistance in organic transistors journal December 2018
Polymeric charge storage electrets for non-volatile organic field effect transistor memory devices journal January 2015
Printable and flexible electronics: from TFTs to bioelectronic devices journal January 2015
Surface potential profiling and contact resistance measurements on operating pentacene thin-film transistors by Kelvin probe force microscopy journal December 2003
Single-crystal organic field-effect transistors based on dibenzo-tetrathiafulvalene journal December 2004
Polarization effects in the channel of an organic field-effect transistor journal July 2006
Contact resistance of dibenzotetrathiafulvalene-based organic transistors with metal and organic electrodes journal January 2008
Probing phase transitions and stability of organic semiconductor single crystals by dielectric investigation journal January 2011
Effects of trifluoromethyl substituents on interfacial and bulk polarization of polystyrene gate dielectrics journal January 2019
Field-dependent charge transport in organic thin-film transistors: Impact of device structure and organic semiconductor microstructure journal August 2019
Recent advances in neuromorphic transistors for artificial perception applications journal December 2022
Memristor-based neural networks journal February 2013
Effect of organic electroactive crystallites in a dielectric matrix on the electrical properties of a polymer dielectric journal June 2023
Memristor-The missing circuit element journal January 1971
Regulation of Synaptic Efficacy by Coincidence of Postsynaptic APs and EPSPs journal January 1997
Organic Field-effect Transistors Based on Solution-processible Dibenzotetrathiafulvalene Derivatives journal January 2009
Synaptic Modifications in Cultured Hippocampal Neurons: Dependence on Spike Timing, Synaptic Strength, and Postsynaptic Cell Type journal December 1998

Similar Records

Effect of organic electroactive crystallites in a dielectric matrix on the electrical properties of a polymer dielectric
Journal Article · Thu Jun 29 20:00:00 EDT 2023 · Physical Review Materials · OSTI ID:1987653

Microstructural control of charge transport in organic blend thin-film transistors
Journal Article · Wed Jul 16 20:00:00 EDT 2014 · Advanced Functional Materials · OSTI ID:1265395