Rational Materials Design for In Operando Electropolymerization of Evolvable Organic Electrochemical Transistors

• Organic electrochemical transistors formed by in operando electropolymerization of the semiconducting channel are increasingly becoming recognized as a simple and effective implementation of synapses in neuromorphic hardware. However, very few studies have reported the requirements that must be met to ensure that the polymer spreads along the substrate to form a functional conducting channel. The nature of the interface between the substrate and various monomer precursors of conducting polymers through molecular dynamics simulations is investigated, showing that monomer adsorption to the substrate produces an increase in the effective monomer concentration at the surface. By evaluating combinatorial couples of monomers baring various sidechains with differently functionalized substrates, it is shown that the interactions between the substrate and the monomer precursor control the lateral growth of a polymer film along an inert substrate. This effect has implications for fabricating synaptic systems on inexpensive, flexible substrates. © 2022 The Authors. 

Subject headings

NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)

NATURVETENSKAP  -- Kemi -- Polymerkemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Polymer Chemistry (hsv//eng)

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Nanoteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Nano-technology (hsv//eng)

NATURVETENSKAP  -- Kemi -- Organisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Organic Chemistry (hsv//eng)

Keyword

2;3-dihydrothieno[3

4-b][1

4]dioxin-5-yl)thiophene

5-bis(2

electropolymerization

ETE-S

evolvable transistors

organic electrochemical transistors

silanes

synaptic transistors

Conductive films

Functional materials

Molecular dynamics

Monomers

Polymer films

Semiconducting films

Substrates

Transistors

2

3-dihydrothieno[3

Electropolymerisation

Evolvable

Evolvable transistor

Synaptic transistor

Conducting polymers

2;3-dihydrothieno[3

4-b][1

4]dioxin-5-yl)thiophene

5-bis(2

electropolymerization

ETE-S

evolvable transistors

organic electrochemical transistors

silanes

synaptic transistors

Publication and Content Type

ref (subject category)

art (subject category)