Chemistry of Materials,
Год журнала:
2023,
Номер
35(2), С. 405 - 415
Опубликована: Янв. 9, 2023
An
n-type
conjugated
polymer
based
on
diazaisoindigo
(AIID)
and
fluorinated
thiophene
units
is
introduced.
Combining
the
strong
electron-accepting
properties
of
AIID
with
backbone
fluorination
produced
gAIID-2FT,
leading
to
organic
electrochemical
transistors
(OECTs)
normalized
values
4.09
F
cm–1
V–1
s–1
a
transconductance
(gm,norm)
0.94
S
cm–1.
The
resulting
OECTs
exhibit
exceptional
operational
stability
long
shelf-life
in
ambient
conditions,
preserving
100%
original
maximum
drain
current
after
over
3
h
continuous
operation
28
days
storage
air.
Our
work
highlights
advantages
integrating
electron
acceptors
donor
boost
performance
OECTs.
Nature Electronics,
Год журнала:
2023,
Номер
6(4), С. 281 - 291
Опубликована: Апрель 27, 2023
Abstract
By
integrating
sensing,
memory
and
processing
functionalities,
biological
nervous
systems
are
energy
area
efficient.
Emulating
such
capabilities
in
artificial
is,
however,
challenging
is
limited
by
the
device
heterogeneity
of
sensing
cores.
Here
we
report
an
organic
electrochemical
transistor
capable
processing.
The
has
a
vertical
traverse
architecture
crystalline–amorphous
channel
that
can
be
selectively
doped
ions
to
enable
two
reconfigurable
modes:
volatile
receptor
non-volatile
synapse.
As
receptor,
multi-modal
responsive
stimuli
as
light.
synapse,
it
10-bit
analogue
states,
low
switching
stochasticity
good
state
retention.
We
also
show
homogeneous
integration
devices
could
provide
functions
conditioned
reflexes
used
for
real-time
cardiac
disease
diagnoses
via
reservoir
computing.
Chemical Society Reviews,
Год журнала:
2023,
Номер
52(3), С. 1001 - 1023
Опубликована: Янв. 1, 2023
The
organic
electrochemical
transistor
(OECT)
is
one
of
the
most
versatile
bioelectronic
devices.
This
review
a
guide
for
how
to
characterize
OECTs
and
monitor
mixed
charge
transport
swelling
properties
OECT
channel
materials.
Advanced Materials,
Год журнала:
2022,
Номер
34(24)
Опубликована: Апрель 16, 2022
n-Type
organic
mixed
ionic-electronic
conductors
(OMIECs)
with
high
electron
mobility
are
scarce
and
highly
challenging
to
develop.
As
a
result,
the
figure-of-merit
(µC*)
of
n-type
electrochemical
transistors
(OECTs)
lags
far
behind
p-type
analogs,
restraining
development
OECT-based
low-power
complementary
circuits
biosensors.
Here,
two
donor-acceptor
(D-A)
polymers
based
on
fused
bithiophene
imide
dimer
f-BTI2
as
acceptor
unit
thienylene-vinylene-thienylene
(TVT)
donor
co-unit
reported.
The
cyanation
TVT
enables
polymer
f-BTI2g-TVTCN
simultaneously
enhanced
ion-uptake
ability,
film
structural
order,
charge-transport
property.
it
is
able
obtain
volumetric
capacitance
(C*)
170
±
22
F
cm-3
record
OECT
(μe,OECT
)
0.24
cm2
V-1
s-1
for
f-BTI2g-TVTCN,
subsequently
achieving
state-of-the-art
µC*
41.3
cm-1
geometry-normalized
transconductance
(gm,norm
12.8
S
in
accumulation-mode
OECTs.
In
contrast,
only
moderate
1.50
measured
non-cyanated
f-BTI2g-TVT.
These
remarkable
results
demonstrate
great
power
cyano
functionalization
semiconductors
developing
OMIECs
substantial
aqueous
environment
high-performance
Advanced Materials,
Год журнала:
2023,
Номер
unknown
Опубликована: Фев. 28, 2023
Abstract
Flexible
and
stretchable
biosensors
can
offer
seamless
conformable
biological–electronic
interfaces
for
continuously
acquiring
high‐fidelity
signals,
permitting
numerous
emerging
applications.
Organic
thin
film
transistors
(OTFTs)
are
ideal
transducers
flexible
biosensing
due
to
their
soft
nature,
inherent
amplification
function,
biocompatibility,
ease
of
functionalization,
low
cost,
device
diversity.
In
consideration
the
rapid
advances
in
flexible‐OTFT‐based
broad
applications,
herein,
a
timely
comprehensive
review
is
provided.
It
starts
with
detailed
introduction
features
various
OTFTs
including
organic
field‐effect
electrochemical
transistors,
functionalization
strategies
biosensing,
highlight
on
seminal
work
up‐to‐date
achievements.
Then,
applications
wearable,
implantable,
portable
electronics,
as
well
neuromorphic
biointerfaces
detailed.
Subsequently,
special
attention
paid
planar
fibrous
devices.
The
routes
impart
stretchability,
structural
engineering
material
engineering,
discussed,
implementations
e‐skin
smart
textiles
included.
Finally,
remaining
challenges
future
opportunities
this
field
summarized.
Journal of the American Chemical Society,
Год журнала:
2022,
Номер
144(10), С. 4642 - 4656
Опубликована: Март 8, 2022
A
series
of
fully
fused
n-type
mixed
conduction
lactam
polymers
p(g7NCnN),
systematically
increasing
the
alkyl
side
chain
content,
are
synthesized
via
an
inexpensive,
nontoxic,
precious-metal-free
aldol
polycondensation.
Employing
these
as
channel
materials
in
organic
electrochemical
transistors
(OECTs)
affords
state-of-the-art
performance
with
p(g7NC10N)
recording
OECT
electron
mobility
1.20
×
10-2
cm2
V-1
s-1
and
a
μC*
figure
merit
1.83
F
cm-1
s-1.
In
parallel
to
high
performance,
upon
solution
doping
(4-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)phenyl)dimethylamine
(N-DMBI),
highest
thermoelectric
is
observed
for
p(g7NC4N),
maximum
electrical
conductivity
7.67
S
power
factor
10.4
μW
m-1
K-2.
These
results
among
reported
polymers.
Importantly,
while
this
polylactam
ionic-electronic
conductors
(OMIECs)
highlights
that
synthetic
molecular
design
strategies
bolster
can
be
translated
also
achieve
(OTE)
nuanced
approach
must
used
optimize
performance.
Herein,
we
outline
metrics
provide
new
insights
into
guidelines
next
generation
high-performance
applications,
presenting
first
time
single
polymer
within
both
OTE
applications.
Advanced Functional Materials,
Год журнала:
2022,
Номер
32(16)
Опубликована: Янв. 2, 2022
Abstract
As
new
and
better
materials
are
implemented
for
organic
electrochemical
transistors
(OECTs),
it
becomes
increasingly
important
to
adopt
more
economic
environmentally
friendly
synthesis
pathways
with
respect
conventional
transition‐metal‐catalyzed
polymerizations.
Herein,
a
series
of
novel
n‐type
donor–acceptor‐conjugated
polymers
based
on
glycolated
lactone
bis‐isatin
units
reported.
All
the
synthesized
via
green
metal‐free
aldol
polymerization.
The
strong
electron‐deficient
lactone‐building
blocks
provide
low‐lying
lowest
unoccupied
molecular
orbital
(LUMO)
rigid
backbone
needed
efficient
electron
mobility
up
0.07
cm
2
V
−1
s
.
Instead,
polar
atoms
in
ethylene
glycol
side
chains
contribute
ionic
conductivity.
resulting
OECTs
exhibit
normalized
maximum
transconductance
g
m,norm
0.8
S
μC
*
6.7
F
Data
microstructure
show
that
such
device
performance
originates
from
unique
porous
morphology
together
highly
disordered
amorphous
microstructure,
leading
ion‐to‐electron
coupling.
Overall,
design
strategy
provides
an
inexpensive
polymerization
route
high‐performing
OECTs.
Journal of Materials Chemistry C,
Год журнала:
2022,
Номер
10(7), С. 2314 - 2332
Опубликована: Янв. 1, 2022
Bioelectronics
focuses
on
the
establishment
of
connection
between
ion-driven
biosystems
and
readable
electronic
signals.
Organic
electrochemical
transistors
(OECTs)
offer
a
viable
solution
for
this
task.
mixed
ionic/electronic
conductors
(OMIECs)
rest
at
heart
OECTs.
The
balance
ionic
conductivities
OMIECs
is
closely
connected
to
OECT
device
performance.
While
modification
OMIECs'
properties
largely
related
development
conjugated
scaffolds,
such
as
ion
permeability,
solubility,
flexibility,
morphology,
sensitivity
can
be
altered
by
side
chain
moieties.
In
review,
we
uncover
influence
molecular
design
performance
We
summarise
current
understanding
focus
specifically
knowledge
ionic-electronic
coupling,
shedding
light
significance
OMIECs.
show
how
versatile
synthetic
toolbox
chains
successfully
employed
tune
parameters
Nature Communications,
Год журнала:
2022,
Номер
13(1)
Опубликована: Окт. 10, 2022
High-performance
n-type
organic
electrochemical
transistors
(OECTs)
are
essential
for
logic
circuits
and
sensors.
However,
the
performances
of
OECTs
lag
far
behind
that
p-type
ones.
Conventional
wisdom
posits
LUMO
energy
level
dictates
performance.
Herein,
we
show
engineering
doped
state
is
more
critical
OECT
polymers.
By
balancing
charges
to
donor
moiety,
could
effectively
switch
a
polymer
high-performance
material.
Based
on
this
concept,
polymer,
P(gTDPP2FT),
exhibits
record
high
performance
with
μC*
54.8
F
cm-1
V-1
s-1,
mobility
0.35
cm2
response
speed
τon/τoff
=
1.75/0.15
ms.
Calculations
comparison
studies
conversion
primarily
due
uniform
charges,
stabilized
negative
polaron,
enhanced
conformation,
backbone
planarity
at
negatively
charged
states.
Our
work
highlights
role
understanding
polymers'
Advanced Materials,
Год журнала:
2022,
Номер
34(23)
Опубликована: Апрель 21, 2022
Organic
electrochemical
transistors
(OECTs)
represent
an
emerging
device
platform
for
next-generation
bioelectronics
owing
to
the
uniquely
high
amplification
and
sensitivity
biological
signals.
For
achieving
seamless
tissue-electronics
interfaces
accurate
signal
acquisition,
skin-like
softness
stretchability
are
essential
requirements,
but
they
have
not
yet
been
imparted
onto
high-performance
OECTs,
largely
due
lack
of
stretchable
redox-active
semiconducting
polymers.
Here,
a
semiconductor
is
reported
OECT
devices,
namely
poly(2-(3,3'-bis(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)-[2,2'-bithiophen]-5)yl
thiophene)
(p(g2T-T)),
which
gives
exceptional
over
200%
strain
5000
repeated
stretching
cycles,
together
with
performance
on
par
state-of-the-art.
Validated
by
systematic
characterizations
comparisons
different
polymers,
key
design
features
this
polymer
that
enable
combination
nonlinear
backbone
architecture,
moderate
side-chain
density,
sufficiently
molecular
weight.
Using
highly
semiconductor,
intrinsically
fabricated
normalized
transconductance
(≈223
S
cm-1
)
biaxial
up
100%
strain.
Furthermore,
on-skin
electrocardiogram
(ECG)
recording
demonstrated,
combines
built-in
unprecedented
skin
conformability.
Advanced Functional Materials,
Год журнала:
2022,
Номер
32(16)
Опубликована: Янв. 4, 2022
Abstract
Despite
the
growing
attention
on
organic
electrochemical
transistors
(OECTs),
most
research
has
focused
design
of
p‐type
active
materials,
and
number
high‐performance
n‐type
materials
is
limited.
Herein,
a
series
naphthalene
diimide‐based
polymers
incorporated
with
asymmetrically
branched
oligo(ethylene
glycol)
(OEG)
side
chains
are
developed
to
enable
green‐solvent‐processed,
OECTs.
The
OEG
afford
sufficient
solubility
in
eco‐friendly
ethanol/water
solvent
mixtures.
Importantly,
taking
advantage
amphiphilic
nature
OEG‐based
polymers,
solvents
selectively
solvate
hydrophilic
chains,
while
producing
assembled
π−π
stacks
hydrophobic
backbones.
This
enables
highly
ordered
polymer
packing
preferential
edge‐on
orientation,
thus
excellent
lateral
charge
transport.
In
particular,
fine‐tuned
P(NDIMTEG‐T)
provide
compact
backbone
packing,
effective
polaron
generation,
superior
stability
optimized
swelling
capability.
resultant
OECT
shows
best
electrical/electrochemical
performance
family,
represented
by
high
transconductance
(
g
m
)
0.38
S
cm
−1
large
figure‐of‐merit
(µ
C
*)
0.56
F
V
s
.
study
demonstrates
use
aqueous
processing
OECTs,
for
first
time,
suggests
important
guidelines
mixed
ionic‐electronic
conductors
characteristics.