A
highly
soluble,
non-toxic,
and
biocompatible
polymer
polyvinylpyrrolidone
(PVPy)
was
explored
as
a
gate
dielectric
to
demonstrate
low-voltage
operated
p-channel
organic
transistors.
Devices
with
TIPS-Pentacene:
Polystyrene
channel
layer
exhibited
good
electrical
characteristics
at
−5
V
operation.
Moreover,
excellent
repeatability,
bias-stress
stability,
ambient
stability
up
3
months
were
demonstrated
for
these
The
circuit
capability
also
investigated
through
implementation
of
resistive
load
inverter
circuits.
Organic
transistors
such
eco-friendly
solution-processed
materials
will
be
suitable
future
sustainable
electronic
systems
applications.
Memories - Materials Devices Circuits and Systems,
Journal Year:
2024,
Volume and Issue:
7, P. 100102 - 100102
Published: Feb. 2, 2024
In
this
paper,
firstly,
reports
on
use
of
various
nature
originated
polysaccharides
as
gate
dielectric
candidates
for
organic
field
effect
transistors
(OFETs)
to
achieve
eco-friendliness
and
eventual
biodegradability
in
devices,
are
summarized.
To
emphasize
the
same,
performance
flexible
OFETs
fabricated
with
cyanoethyl
cellulose
(CEC),
a
synthetically
modified
is
comprehensively
investigated.
A
widely
studied
TIPS-pentacene:
PS
blend
used
form
active
layer
these
showing
p-channel
transistor
operation
at
low
voltage
−5
V.
Along
high
performance,
devices
exhibited
excellent
repeatability
shelf
life
up
10
months
ambient
conditions.
Effect
repeatability,
bias-stress,
bending
stability
were
investigated
confirm
decent
electrical
stability.
The
device
can
sustain
even
after
application
200
cycles.
Moreover,
annealing
temperature
was
observe
their
suitability
real
applications.
These
findings
suggest
that
be
suitable
eco-sustainable
electronics.
Advanced Materials Technologies,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 17, 2024
Abstract
Controlled
cross‐linking
of
polymer
dielectric
poly
(4‐vinylphenol)
(PVP)
is
demonstrated
as
an
effective
tool
in
enhancing
the
performance
flexible
organic
synaptic
transistors
(OSTs).
Investigation
variation
concentration
agent
methylated
(melamine‐co‐formaldehyde)
(PMCF)
PVP
bilayer
combination
with
high‐
k
hafnium
oxide
(HfO
2
)
gate
devices
shows
that
lower
results
better
memory
performance.
OSTs
26%
PMCF
(by
mass)
exhibit
excellent
window
>
4
V
for
GS
sweep
±5
V,
static
retention
≈10
s,
dynamic
500
cycles,
and
≈125
continuous
program/erase
cycles.
Pulse
paired
facilitation
relaxation
time
constants
370
4670
ms
respectively
slow
rapid
phases
regulating
modulation
amplitude
≈1
resemble
a
biological
synapse.
Through
excitatory
post
current
characteristics,
spike
timing
dependant
plasticity
voltage
are
clearly
observed,
low
energy
consumption
per
on
order
10
pJ.
Further,
by
leveraging
intricate
interconnected
data
transfer
computation
phenomenon,
“AND”
logic
effectively
implemented
using
these
OSTs.
These
exciting
may
open
up
new
directions
toward
development
hardware
neuromorphic
computing.
Macromolecular Rapid Communications,
Journal Year:
2024,
Volume and Issue:
45(12)
Published: March 28, 2024
Abstract
Many
crucial
components
inside
electronic
devices
are
made
from
non‐renewable,
non‐biodegradable,
and
potentially
toxic
materials,
leading
to
environmental
damage.
Finding
alternative
green
dielectric
materials
is
mandatory
align
with
global
sustainable
goals.
Carboxymethyl
cellulose
(CMC)
a
bio‐polymer
derived
has
outstanding
properties.
Herein,
citric
acid,
dextrin,
CMC
based
hydrogels
prepared,
which
biocompatible
biodegradable
exhibit
rubber‐like
mechanical
properties,
Young
modulus
values
of
0.89
MPa.
Hence,
thin
film
CMC‐based
hydrogel
explored
as
suitable
high‐k
candidate
for
operation
at
low
voltages,
demonstrating
high
constant
up
78.
These
fabricated
transistors
reveal
stable
capacitance
(2090
nF
cm
−2
)
≈±3
V
operation.
Using
polyelectrolyte‐type
approach
poly‐(2‐vinyl
anthracene)
(PVAn)
surface
modification,
this
study
demonstrates
layer
(d
≈30
nm)
small
voltage
threshold
(
th
≈−0.8
V),
moderate
transconductance
g
m
≈65
nS),
ON–OFF
ratio
(≈10
5
).
Furthermore,
the
exhibits
performance
under
bias
stress
±
3.5
100
cycles
switching
tests.
The
modified
desirable
low‐voltage
operation,
further
highlighting
its
biocompatibility.
Advanced Materials Technologies,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 9, 2024
Abstract
Ubiquitous
electronic
gadgets
in
lives
have
led
to
an
increase
waste
(e‐waste),
posing
a
threat
the
environment
and
ecology
that
must
be
addressed.
This
work
demonstrates
use
of
gelatin,
natural
protein,
for
development
flexible
biodegradable
substrates
synaptic
transistors
using
same
material
as
gate
dielectric.
The
fabricated
p‐channel
exhibit
high
electrical
stability
exceptional
characteristics
through
spike
timing
dependent
plasticity
(STDP),
voltage
(SVDP),
number
(SNDP),
respectively
upon
variation
post‐synaptic
current
(PSC)
with
time,
amplitude,
stimuli.
These
devices
pulse
paired
facilitation
(PPF)
relaxation
time
constants
range
≈10
ms
regulating
modulation
amplitude
1
greatly
resembling
biological
synapse.
Study
on
variability
among
distinct
over
multiple
cycles
demonstrate
outstanding
repeatability
plasticity.
showcase
significant
PSC
values
almost
linear
SNDP,
while
consuming
ultralow
power
≈11.7
fJ.
Excellent
is
observed
when
subjected
bending
sequences.
Complete
dissolution
these
aqueous
environments
hour
without
any
alteration
temperature
or
pH
confirms
excellent
biodegradability
leading
toward
transient
neuromorphic
circuits
systems
adhere
concepts
circular
economy.
IEEE Transactions on Electron Devices,
Journal Year:
2023,
Volume and Issue:
71(1), P. 762 - 768
Published: Nov. 21, 2023
Ecofriendly
solution
processed
organic
transistors
were
demonstrated
on
a
biodegradable
paper
substrate
for
−5-V
operation.
Blend
of
semiconductor
TIPS-pentacene
and
polystyr-
ene
(PS)
polymer
was
utilized
to
form
the
active
layer,
along
with
natural
protein,
i.e.,
gelatin
as
primary
gate
dielectric,
both
which
offer
eco-friendliness
from
proc-
ess
material
aspects.
Fabricated
showed
excellent
transistor
behavior
p-channel
opera-
tion
maximum
process
transconductance
value
15
nF/
$\text{V}\cdot
\text{s}$
leading
mobility
2.3
cm2/
obtained
capacitance
density
derived
at
1
kHz.
The
average
threshold
voltage
−0.7
V
suitable
low-voltage
achieved
decent
ON/OFF
current
ratio
notation="LaTeX">$\sim
10^{{4}}$
.
High
electrical
stability
through
repeatability
transfer
characteristics
bias-stress
measurements.
Excellent
environmental
in
normal
ambient
observed
up
seven
weeks.
These
devices
circuit
applicability
switching
resis-
tive
load
inverters
good
sensitivity
ultraviolet
(UV)
light,
making
them
candidate
exploration
multifunctional
disposable
application.
ChemSusChem,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 21, 2024
Abstract
The
spread
of
point‐of‐care
(PoC)
diagnostic
tests
using
electrochemical
sensors
poses
a
significant
environmental
challenge,
especially
in
limited‐resource
settings
due
to
the
lack
waste
management
infrastructure.
This
issue
is
expected
intensify
with
emergence
Internet
Medical
Things
(IoMT),
necessitating
eco‐friendly
solutions
for
disposable
devices.
review
discusses
efforts
develop
green
and
sustainable
PoC
devices,
clarifying
terms
like
biodegradability
transient
electronics.
It
explores
potential
biodegradable
materials
fabrication
technologies,
emphasizing
electronics
low‐energy
consumption
low‐carbon
footprint
techniques,
particularly
favoring
printing
methods.
highlights
examples
necessary
electronic
components
containing
devices
their
role
device
sustainability.
Finally,
it
examines
feasibility
integrating
these
technologies
into
comprehensive
addressing
imminent
need
testing.
discussion
serves
as
guide
researchers
developers
striving
mitigate
impact
testing
era
IoMT
personalized
medicine.
